Best Apps for Android

Updated for 2026

13 Best Voice Recorder Apps for Android

Updated August 2026 · Play listings for Easy Voice Recorder, Audio Recorder and Otter re-read 26 August 2026 · the other ten checked 8 August 2026

Our answer

Easy Voice Recorder is our best overall because presets cover notes, meetings and music, and on 26 August 2026 it was free with ads, Pro from $1.49.

Audio Recorder is our best free pick because recording and sharing are unrestricted, and on 26 August 2026 it was free with no ads, trim tools from $0.99.

Otter is our transcripts pick because it captions speakers live, and on 26 August 2026 it was free with no ads, Pro from $12.99.

Data checked: 26 August 2026.

Thirteen Android voice recorders for lectures, interviews and quick memos. Every rating, install badge, ad label and price below is read from the app’s own Google Play listing. Two picks install on one brand of phone only, and the table says so. Most sit in the wider Music and Audio category.

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Compare all 13 voice recorder apps · rating, ads and what you pay

Everyday memos

Easy Voice Recorder · presets and a Wear OS tile

4.7 stars from more than 622,000 ratings · 50M+ installs · free to install, in-app purchases $1.49 to $4.99 per item · contains ads · by Digipom · Play listing updated 15 July 2026 · checked 26 August 2026

Easy Voice Recorder is our default pick: a 50M+ install badge, 4.7 stars on 26 August 2026, and presets for voice notes, meetings and music. The free build shows ads and cannot make an MP3 at all. MP3, FLAC and AAC, Drive and Dropbox upload, trimming, folders and stereo are all Pro.

  • Plus · presets for notes, meetings and lectures, plus a Wear OS watch tile
  • Plus · unlimited length, background recording and home screen widgets, free
  • Plus · Digipom publishes a help page saying where files are stored
  • Minus · no MP3, FLAC or AAC without paying
  • Minus · contains ads, and Pro is sold as items from $1.49 to $4.99
  • Minus · Bluetooth microphone recording drops to 8000 Hz mono, per that same help page

Skip it if you need MP3 without paying. Choose it over Smart Voice Recorder for cloud upload, trimming and a watch tile.

4.7622K+ ratings on Google PlayGet it on Google Play

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Long sessions

Smart Voice Recorder · skip silence as you record

4.6 stars from 484,895 ratings · 10M+ installs · free to install, one in-app item at $1.99 · contains ads · by SmartMob · Play listing updated 30 October 2025 · checked 8 August 2026

Smart Voice Recorder suits long unattended takes, because it drops silence while it records rather than afterwards. It is free with ads, and the listing never says what the single $1.99 item buys. The blunt limit is format: WAV and PCM only, no MP3 anywhere, with a stated 2 GB ceiling per file.

  • Plus · skip silence applied live, with manual or automatic sensitivity
  • Plus · a calibration screen for background hum before you start
  • Plus · SmartMob documents the storage folder on its own help site
  • Minus · WAV and PCM only, so files are large and there is no MP3
  • Minus · a 2 GB per file ceiling a long overnight take can reach
  • Minus · its description claims 50 million installs while its own badge reads 10,000,000+

Skip it if you need MP3 or a file above 2 GB. Choose it over Easy Voice Recorder for overnight length and dead air trimming. It doubles for capturing outdoor sounds.

4.6485K ratings on Google PlayGet it on Google Play

Also on Best Apps for Android: Best Podcast Apps for Android
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Searchable transcripts

Otter · live transcription while you record

4.7 stars from more than 41,000 ratings · 5M+ installs · free to install, in-app purchases $12.99 to $99.99 per item · no ads · by Otter.ai, listed as OtterAI Transcribe Voice Notes · Play listing updated 18 August 2026 · checked 26 August 2026

Otter is the pick when the words matter more than the audio: live transcription, speaker labels, slide capture on Zoom, Meet and Teams. No ads, and the free Basic plan lists 300 monthly transcription minutes, capped at 30 minutes per conversation. Its own requirements are blunt: an account and an internet connection are mandatory, English, Spanish and French only.

  • Plus · a live transcript with speaker labels while the recording runs
  • Plus · no ads, and a free tier documented at otter.ai/pricing as 300 minutes a month, read there on 8 August 2026
  • Plus · the Play listing was updated 18 August 2026, checked 26 August 2026
  • Minus · transcription needs an internet connection, and three languages only
  • Minus · the Play Data safety block says it may share data with third parties
  • Minus · the free Basic plan stops at 300 transcription minutes a month, 30 minutes per conversation, and 3 lifetime file imports

Skip it if the conversation is confidential or in another language. Choose it over Rev for capturing one meeting on Zoom, Meet or Teams, since Rev is the one built for analysis across several recordings.

4.741K+ ratings on Google PlayGet it on Google Play

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Pixel only

Google Recorder · on-device transcripts, Pixel only

3.3 stars from 15,631 ratings · Pixel phones only, so the Play install badge is not an adoption figure · free, no in-app purchases · no ads · by Google LLC, listed as Recorder · Play listing updated 10 July 2026 · checked 8 August 2026

Google Recorder is our pick for transcribing without uploading, and it costs nothing, with no ads and no purchases. It also carries a low rating, 3.3 stars from 15,631 ratings, checked 8 August 2026. The reason is reach: the listing will not install on a non-Pixel phone.

  • Plus · transcription and search run on the device
  • Plus · free, with no ads and no in-app purchases
  • Plus · searchable transcripts with auto labelled sections, and summaries that Google’s own help page says run in the cloud
  • Minus · Pixel only, and its update notes scope headline features to Pixel 8 and Pixel 9
  • Minus · 3.3 stars from 15,631 ratings, checked 8 August 2026
  • Minus · re-transcribing may process audio on Google servers, per Google’s own help page

Skip it if you do not own a Pixel. Choose it over Otter when the audio must not leave the phone.

Preinstalled on Pixel. The Play listing does not install on other phones, and its install badge reads 1+, which is not a download count.

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Galaxy only

Samsung Voice Recorder · Interview mode on two microphones

4.0 stars from 291,698 ratings · 1B+ installs · free, no in-app purchases · no ads · Data safety reports no data collected · by Samsung Electronics · Play listing updated 27 August 2025 · checked 8 August 2026

Samsung Voice Recorder is already on the phone if you own a Galaxy. It costs nothing, carries no ads and no purchases, and its Data safety section reports no data collected. The limit is its own summary line: this is a recorder for the Galaxy series. Interview mode records two people on the top and bottom microphones as separate waveforms.

  • Plus · Interview mode splits two speakers across two microphones
  • Plus · no ads, no purchases, and no data collected per Data safety
  • Plus · nothing to install or sign into on a Galaxy phone
  • Minus · Galaxy only, and the listing warns supported features vary by device
  • Minus · 4.0 stars from 291,698 ratings, checked 8 August 2026
  • Minus · the listing has not been updated since 27 August 2025

Skip it if you do not own a Galaxy. Choose it over Easy Voice Recorder for a two microphone interview with no install and no ads.

Preinstalled on Galaxy. The Play listing installs only on Samsung devices.

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Music and ideas

Dolby On · automatic mastering on every take

4.1 stars from 25,409 ratings · 5M+ installs · free, no in-app purchases · no ads · by Dolby Laboratories · Play listing updated 12 June 2026 · checked 8 August 2026

Dolby On is free in every sense: no ads, no purchases, nothing gated. It masters every take automatically, with noise reduction, de-essing, dynamic EQ, compression and limiting, and no settings to get wrong. It is also the wrong tool for notes. Its description never mentions transcription, formats or gain, and Data safety says data cannot be deleted.

  • Plus · an automatic mastering chain with nothing to configure
  • Plus · genuinely free: no ads and no in-app purchases
  • Plus · maintained, with the listing updated 12 June 2026
  • Minus · no transcription, and no format or sample rate control
  • Minus · the Data safety section states that data cannot be deleted
  • Minus · built for music, so it answers no lecture, meeting or memo job

Skip it if you need a searchable memo. Choose it over RecForge II for a good sounding take with no settings, next to podcast apps if you publish.

4.125.4K ratings on Google PlayGet it on Google Play

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Stale listing

Awesome Voice Recorder · direct MP3 with folders

4.3 stars from 3,607 ratings · 1M+ installs · free, no in-app purchases · contains ads · by Newkline · Play listing last updated 21 July 2024 · checked 8 August 2026

Awesome Voice Recorder records straight to MP3, WAV or M4A, sorts takes into folders and trims and converts them in the app. Read the date first. The listing has not been updated since 21 July 2024, twenty five months ago, and it is ad supported with nothing sold that removes the ads.

  • Plus · records straight to MP3, WAV or M4A with nothing to buy
  • Plus · folder categories, in-app trimming, converting and sound tags
  • Plus · no in-app purchases at all
  • Minus · no listing update since 21 July 2024
  • Minus · contains ads, with no purchase that removes them
  • Minus · only 3,607 ratings behind a 1M+ badge, and its feature list advertises that secret recording is possible

Skip it if you would be unhappy to lose a recording to an unmaintained app. Choose it over Voice Recorder by Splend Apps only for folder categories and in-app converting.

4.33.6K ratings on Google PlayGet it on Google Play

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Listing changed hands

Parrot Voice Recorder · scheduled starts, under new ownership

4.4 stars from 12,250 ratings · 1M+ installs · free to install, in-app purchases $0.99 to $149.99 per item · contains ads · by One Music Player · Play listing updated 6 May 2025 · checked 8 August 2026

Parrot Voice Recorder is not the app older roundups describe. The listing is published by One Music Player now, not Searing Media, and it has been rewritten around call recording, which modern Android blocks. It is free with ads, its items reach $149.99, and the listing’s permissions note puts scheduled recording in Parrot Pro. The What’s new field is empty.

  • Plus · scheduled recordings that start themselves at a set time, which the permissions note puts in Parrot Pro
  • Plus · Google Drive and Dropbox backup
  • Plus · 4.4 stars from 12,250 ratings, earned under the previous owner
  • Minus · the developer name changed, so older reviews describe a different app
  • Minus · the description is keyword filler built around call recording
  • Minus · items reach $149.99, and the listing has not moved since 6 May 2025

Skip it if you came for the calm memo recorder Parrot used to be. Choose it over Audio Recorder only when a scheduled start is the one feature you cannot do without.

4.412.2K ratings on Google PlayGet it on Google Play

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Free formats

Voice Recorder by Splend Apps · a wide free format range

4.7 stars from 362,679 ratings · 10M+ installs · free to install, one in-app item at $1.99 · contains ads · by Splend Apps · Play listing updated 22 June 2026 · checked 8 August 2026

This is a simple recorder with a wide free format range: MP3, PCM, AAC and AMR, 8 to 44 kHz, 32 to 320 kbps, all free. It carries ads, and the listing never says what the single $1.99 item unlocks. Its selectable audio source line mentions phone calls, then the same page says it is not a dedicated call recorder.

  • Plus · MP3, PCM, AAC and AMR with sample rate and bitrate choice, free
  • Plus · 4.7 stars from 362,679 ratings, joint highest among the ad supported apps here, level with Easy Voice Recorder
  • Plus · sorting by name, date or size once files run to hundreds
  • Minus · contains ads, and the $1.99 item is never explained
  • Minus · the call recording line contradicts itself on the same page
  • Minus · the Data safety section states that data cannot be deleted

Skip it if you want a listing with no ads. Choose it over Easy Voice Recorder when you want MP3 without paying.

4.7363K ratings on Google PlayGet it on Google Play

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Paid transcripts

Rev · analysis across several recordings at once

4.1 stars from 3,102 ratings · 500K+ installs · free to install, in-app purchases $1.99 to $149.99 per item · no ads · by Rev.com · Play listing updated 24 June 2026 · checked 8 August 2026

Rev is the specialist. It runs analysis across several recordings at once and surfaces quotes and contradictions with citations back to the audio. Recording is free with no ads, but human review is paid, from $1.99 to $149.99. Its reach is modest: a 500K+ install badge and 3,102 ratings, checked 8 August 2026.

  • Plus · analysis across several recordings, with citations back to the audio
  • Plus · no ads anywhere in the app
  • Plus · maintained, with the listing updated 24 June 2026
  • Minus · the listing never says where the free tier stops
  • Minus · the 99 percent accuracy headline belongs to the paid human review, and the compliance claims are scoped to enterprise
  • Minus · a 500K+ install badge, checked 8 August 2026

Skip it if you only need a recorder. Choose it over Otter when you have several interviews to compare rather than one meeting to caption.

4.13.1K ratings on Google PlayGet it on Google Play

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Sensitive recordings

Audio Recorder · open source, with crash recovery

4.1 stars from more than 5,800 ratings · 1M+ installs · free to install, in-app purchases $0.99 to $2.49 per item · no ads · Data safety reports no data collected · by Dmytro Ponomarenko · Play listing updated 5 August 2026 · checked 26 August 2026

Audio Recorder is the pick for anything sensitive: no ads, no data collected, and source on GitHub. Trimming and cutting are the Pro features named on the listing. The blunt limit is format: M4A, WAV and 3GP only, no MP3. Broken Record Recovery restores a take after a crash, a feature the listing names.

  • Plus · Broken Record Recovery after a crash, plus auto split of long sessions
  • Plus · no ads, no data collected, and the source published on GitHub
  • Plus · formats, sample and bit rates, background recording and sharing are free
  • Minus · no MP3: the choice is M4A, WAV or 3GP
  • Minus · trimming and cutting are held back for the paid version
  • Minus · recordings live in the app private folder, which the developer cannot change

Skip it if you need MP3 files. Choose it over Voice Recorder by Splend Apps for no ads, no data collection and a published source tree.

4.15.8K+ ratings on Google PlayGet it on Google Play

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Manual gain

Audio Recorder on Android, main screen.Audio Recorder on Android, settings.Audio Recorder on Android, recording list.
Screenshots of Audio Recorder by Dmytro Ponomarenko, captured on our own emulator on 17 August 2026. Tap a shot to enlarge.
X
Audio Recorder, main screen.
Main screen
Audio Recorder, settings.
Settings
Audio Recorder, recording list.
Recording list
Swipe to browse · tap X to close

RecForge II · manual gain, and a 2.9 star rating

2.9 stars from 17,956 ratings · 5M+ installs · free, no in-app purchases · contains ads · by Dje073 · Play listing updated 3 August 2026 · checked 8 August 2026

RecForge II lets you switch Automatic Gain Control off and set the level by hand, though its own listing cautions that AGC control and manual gain are not available on every device, and every codec is free and ad supported. Print the rating beside that: 2.9 stars from 17,956 ratings, checked 8 August 2026, the lowest figure this page prints. Its own release note for the 3 August 2026 build says the record button did nothing on Android 11 and 12.

  • Plus · manual gain with AGC switched off, where the device supports it
  • Plus · eight codecs including FLAC and WAV, plus editing and converting, free
  • Plus · external microphone support with nothing to buy
  • Minus · 2.9 stars from 17,956 ratings, far the lowest score here
  • Minus · the record button was broken on Android 11 and 12 until 3 August 2026
  • Minus · widgets and the recording scheduler are still missing from the 1.2.x line

Skip it if you want a long clean track record. Choose it over Dolby On when you set input levels yourself, alongside multitrack recording or an equalizer app.

2.918K ratings on Google PlayGet it on Google Play

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Cloud upload

ASR Voice Recorder · cloud upload to eight services

4.5 stars from 60,531 ratings · 5M+ installs · free to install, in-app purchases $2.49 to $9.99 per item · contains ads · by NLL APPS · Play listing updated 30 March 2026 · checked 8 August 2026

ASR Voice Recorder is the pick when a recording has to exist somewhere other than the phone: Drive, Dropbox, OneDrive, Box, Yandex Disk, FTP, WebDav and auto email, plus device to device transfer over local WiFi. That headline feature is marked Pro in the app’s own feature list, so the free build is an ordinary recorder with ads.

  • Plus · formats, profiles, tags, notes, converter, speed control and gain are free
  • Plus · NLL APPS documents formats and bitrates on its own product page
  • Plus · 4.5 stars from 60,531 ratings, checked 8 August 2026
  • Minus · the cloud upload that defines the app is Pro only, $2.49 to $9.99
  • Minus · contains ads in the free build
  • Minus · no listing update since 30 March 2026

Skip it if you will not pay for the upload. Choose it over Easy Voice Recorder for upload targets beyond Drive and Dropbox.

4.560.5K ratings on Google PlayGet it on Google Play

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How to choose a voice recorder for Android

Four things decide whether a recorder still suits you in a year: what it records, where the files go, where any transcription happens, and what you are allowed to record.

What the app actually records

Two settings shape the sound: sample rate, usually 44.1 kHz or 48 kHz, and bitrate, where higher means more detail and bigger files. Speech is happy at a modest bitrate. Singing is not.

Format is what catches people out. Android’s own supported media formats table lists built in encoders for AAC, AMR, FLAC, Opus and PCM or WAVE, but not for MP3, which is decode only. That is why WAV and M4A are near universal here while AMR is not, why recording straight to MP3 means the developer ships an encoder, and why Easy Voice Recorder sells MP3 as a Pro feature while Splend Apps gives it away with ads.

Where the files end up

After a few months the problem is finding one file among two hundred. Look for renaming, sorting and bookmarks you can drop mid-recording. Then check where the audio actually lives, because that differs by app: RecForge II saves into the Music folder, Voice Recorder by Splend Apps and ASR Voice Recorder both let you set the recordings folder, and Digipom’s help page names an EasyVoiceRecorder folder, while apps that keep their recordings in app private storage leave you nothing to browse to. Android’s scoped storage rules restrict what an app may touch, and developers have adapted. Dmytro Ponomarenko, who publishes the source of Audio Recorder, explains the consequence in the project’s own README: “There is no plans to add feature where user can change recording directory. Newer versions of Android added restrictions on ability to interact with device file system. There is no simple way how to implement the feature. So all records are stored in app's private dir. Anyway, all record files available for user to download from app's private dir to a public dir.” That is platform behavior, not a bug in one app, and it is why an export button matters more than a folder picker.

On the phone or in the cloud

Transcription is the feature people upgrade for, and the question is where it runs. Cloud transcription uploads your audio to a company server. For a shopping list that is irrelevant. For a medical note or a source interview it is a decision, not a detail.

On-device transcription keeps the audio on the phone. Google is specific in Pixel Phone Help: “Recorder sends audio to an on-device Google service or app to transcribe it. After the audio is transcribed, the Google service or app discards the audio.” The same help center adds a caveat to re-transcribing: “Re-transcribe may process audio files on Google servers.” Both sentences belong together. Recent Galaxy phones can also transcribe, though the Samsung listing mentions only editing transcribed text and never says whether that transcription runs on the phone. Otter and Rev are cloud services by design. If a recording is sensitive, transcribe on the device, or keep a plain file and use our guide to transcribing a voice recording on Android later.

Permissions and consent

A recorder needs the microphone and storage. It does not need contacts or location. Since Android 14, an app that keeps capturing with the screen off must declare a microphone foreground service, which is why a notification sits in the shade during a long take, and why battery optimization can cut short an app that skips it.

Consent is the other half, and the rules vary by place. In many US states and other countries you may record a conversation you are part of, which is called one party consent. Several US states require every participant to agree. Secretly recording a private conversation you are not part of is widely prohibited. Parrot Voice Recorder advertises call recording as its headline feature, and Voice Recorder by Splend Apps offers a call audio source then says on the same page that it is not a dedicated call recorder, while RecForge II states plainly that it does not record calls. The other two are qualified: Easy Voice Recorder’s page says it is “not a call recorder and can’t record phone calls on most phones”, and Smart Voice Recorder’s says the app “is not designed explicitly for recording phone calls” and that “recordings will be paused during phone calls by default”. The safe habit: record your own notes freely, and ask before recording other people. Recording a phone call is a separate job with its own rules, and our guide to recording Android calls legally covers what still works. This is general information, not legal advice.

Pair it with: a podcast app if you publish episodes, an equalizer app for playback, and a music player app for longer captures.

How we verify. Every figure on this page is read from the app’s own Google Play listing, and each entry prints the date it was read.
  • What the listing gives us. Rating and review count, install band, price and the in-app purchase range, the Contains ads label, the Data Safety section, and the developer’s own description where it settles something the store fields cannot.
  • Screenshots. Where a section carries screenshots they are our own emulator captures, and the caption gives the date of capture. Audio Recorder is the one entry with captures on this page.
  • What a listing cannot tell you. It does not say how an app holds up over weeks, how its output sounds, or what it costs in battery, so this page does not rank those. Where an app has been withdrawn, is locked to a region we cannot reach, or sits behind a consent dialog we would have to accept advertising tracking to pass, the entry says so instead of guessing.
Play listings for Easy Voice Recorder, Audio Recorder and Otter were re-read on 26 August 2026. The other ten carry their 8 August 2026 read, and this page is revisited quarterly.

Changelog. 26 August 2026: the Google Play listings for Easy Voice Recorder, Audio Recorder and Otter were re-read. Otter moves to 4.7 stars with its listing updated 18 August 2026; Audio Recorder moves to 4.1 stars with its listing updated 5 August 2026; Easy Voice Recorder is unchanged. The other ten listings keep their 8 August 2026 figures, and the 300 free minutes a month for Otter keeps its 8 August 2026 date because otter.ai publishes it, not Google Play. 8 August 2026: ratings, install badges, ad labels and purchase ranges re-read on all 13 listings. Rev corrected to 4.1 stars. Smart Recorder renamed to its store name. A paid unlock the entry should never have carried was removed from RecForge II, which sells nothing. Awesome Voice Recorder flagged as 25 months without an update.

Keep reading

Voice recorder questions, answered

Which voice recorder app gives the clearest audio?

Format and microphone placement decide that more than the app does. Recording to WAV or PCM avoids compression entirely: Voice Recorder by Splend Apps offers PCM up to 44 kHz in its free build, and Audio Recorder offers WAV with no ads. RecForge II is the only app here that lets you switch Automatic Gain Control off and set the level by hand, though its own listing says AGC control and manual gain are not available on every device, and it sits at 2.9 stars from 17,956 ratings, checked 8 August 2026. Keep the phone microphone pointed at the speaker and away from rustling hands or pockets.

Which of these voice recorder apps have no ads?

Six of the thirteen carry no Contains ads label on their own Play listing, checked 8 August 2026: Otter, Google Recorder, Samsung Voice Recorder, Dolby On, Rev and Audio Recorder. The other seven are ad supported. Only Dolby On, Google Recorder and Samsung Voice Recorder have neither ads nor in-app purchases, and two of those three install on one brand of phone only. All thirteen are free to install.

Can these apps transcribe my recordings into text?

Five of them can. Otter transcribes live while it records, and Rev advertises live transcription on its own listing too, so the difference between them is meeting capture against analysis across several files, not live against ordered later. Google Recorder transcribes on the device, but its listing installs only on Pixel phones. Recent Galaxy phones can transcribe with the built in Samsung recorder, though that listing warns supported features vary by device. ASR Voice Recorder transcribes by uploading to OpenAI Whisper, which its product page lists under cloud upload, so that is cloud transcription and the upload is a Pro feature. The other eight, Easy Voice Recorder, Smart Voice Recorder, Dolby On, Awesome Voice Recorder, Parrot Voice Recorder, Voice Recorder by Splend Apps, Audio Recorder and RecForge II, are audio only, so you would export the file and run it through a transcription service separately.

Is my audio uploaded somewhere when an app transcribes it?

Often, yes. Cloud transcription sends the audio to a company server and returns the text, which is a real concern for confidential conversations. Google states that Recorder transcribes on the device and then discards the audio, although the same help pages add that re-transcribing a file may process it on Google servers. If a recording is sensitive, prefer on device transcription, or keep a plain local file with no transcription at all.

Does recording keep working when the screen is off?

Yes on the eight listings that state it: Easy Voice Recorder, Smart Voice Recorder, Voice Recorder by Splend Apps, Awesome Voice Recorder, ASR Voice Recorder, RecForge II, Audio Recorder and Google Recorder all advertise recording in the background with the display off. Since Android 14, an app that records with the screen off has to declare a microphone foreground service, which is why a persistent notification appears during a long take. If long sessions keep stopping, allow the app to ignore battery optimization in Android settings.

Can any of these apps record a phone call?

Treat that as no. Modern Android blocks ordinary apps from capturing call audio, and the listings reflect it. Easy Voice Recorder states on its own page that it is not a call recorder and cannot record phone calls on most phones. Voice Recorder by Splend Apps offers a call audio source, then says on the same page that it is not a dedicated call recorder. Parrot Voice Recorder advertises call recording as its headline feature and sells it behind a paid tier, which is one reason to be careful with that entry.

Is it legal to record a conversation on my phone?

It depends on where you are. In many US states and other countries you may record a conversation you are part of (one party consent), but several US states require every person to consent (two party or all party consent), and secretly recording a private conversation can be illegal. Recording your own voice notes is fine. The safe habit is to get consent before recording other people. This is general information, not legal advice.

13 Best Voice Recorder Apps for Android, Compared and Verified