BlackBox vs Smart Voice Recorder: Long Recording Compared
Smart Voice Recorder (often searched as Smart Recorder) is a long-running Android recorder known for skipping silence on the fly and recording uncompressed WAV with the screen off. BlackBox is built for all-day and scheduled recording on Android and iPhone, saving compressed hourly files at about 14.4 MB per hour and transcribing them on-device.
We make BlackBox, so read this as informed rather than neutral. Every Smart Voice Recorderdetail below comes from its own store listing or help docs (linked in References); where a listing doesn't say, the table says so rather than guessing. Spot something out of date? Tell us.
BlackBox vs Smart Voice Recorder: feature by feature
| Feature | BlackBox | Smart Voice Recorder |
|---|---|---|
| Platforms | ✓iPhone and Android | ◐Android only |
| Keeps recording with the screen off | ✓Yes — screen off, in your pocket, in other apps | ✓Yes — even with the display off |
| Built for all-day (24/7) recording | ✓Yes — press record once and it runs all day | ◐Long recordings, up to 2 GB per file |
| Scheduled start and stop | ✓Yes — separate weekday and weekend windows | –Not stated in listing |
| Splits long recordings into files automatically | ✓Yes — one file per hour, days auto-archived | –Not stated in listing |
| Recording length limit | ✓No app-imposed limit; runs while the OS allows | ◐Storage-limited; 2 GB cap per file |
| Storage per hour of audio | ✓≈14.4 MB per hour | ✕WAV: about 58–318 MB/hr (16-bit mono, 8–44.1 kHz) |
| Recording format | ✓AAC, 32 kbps mono, 16 kHz (tuned for speech) | ◐WAV/PCM only, 8–44 kHz |
| Works without an account | ✓No account | –Not stated in listing |
| Where your audio is kept | ✓On your phone; optional backup to your own Files / Drive folder | –Not stated in listing |
| Transcription | ✓Yes — on-device, nothing uploaded | –Not stated in listing |
| Speaker labels | ✓Yes — on-device | –Not stated in listing |
| AI summaries | ✕No | –Not stated in listing |
| Works offline | ✓Yes — recording and transcription | –Not stated in listing |
| In-app lock (Face ID / passcode) | ✓Yes — Face ID, Touch ID or passcode | –Not stated in listing |
| Records phone calls | ✕No — records the room, not the call line | ✕No — pauses during calls by default |
| Works with just your phone | ✓Yes — no extra device | ✓Yes |
✓ yes · ◐ partly or with conditions · ✕ no · – not stated in the listing. Background recording on any app runs only while iOS or Android allows it; a phone call takes the microphone from every recorder.
What Smart Voice Recorder users complain about
Themes from 1–2★ Google Play reviews of Smart Voice Recorder we read in October 2026, paraphrased. The Play listing showed its last update as October 30, 2025.
Old recordings becoming unreachable
The strongest theme: after an Android or app update, older files show as greyed out or "storage location unavailable", or are lost after being made to pick a new save folder.
Source: Google Play reviewsRenaming and file details
Reviewers report renames not sticking and recording lengths or dates showing wrongly.
Source: Google Play reviewsRecordings ending early or sounding wrong
Some long-time users describe background recordings ending prematurely, or garbled audio on newer phones.
Source: Google Play reviewsWhen to pick Smart Voice Recorder instead
- You want silence skipped while recording, so overnight or sparse recordings come out short — the app was built to catch sleep talking.
- You want uncompressed WAV with a sample rate you choose, a live spectrum analyzer and a mic gain calibration tool.
- You only use Android and want a simple, single-purpose recorder.
When BlackBox fits better
- You record for many hours and don't want WAV-sized files — 2 GB of 44.1 kHz WAV is under seven hours.
- You want recording to start and stop on its own on weekday and weekend schedules.
- You want each hour as its own file, finished days archived, and on-device transcription.
- You also use an iPhone, or want the library locked behind your fingerprint or a passcode.
Frequently asked questions
How long can Smart Voice Recorder record?
Its listing says recording time is limited by free storage, with a 2 GB limit per file. At 44.1 kHz, 16-bit mono WAV that's roughly six to seven hours per file. BlackBox saves a new file every hour, so there's no single-file cap to hit.
Does BlackBox skip silence?
BlackBox records continuously rather than cutting silence out, and keeps files small by using compressed AAC at 32 kbps (about 14.4 MB per hour). If you specifically want silence removed as you record, Smart Voice Recorder does that.
Is Smart Voice Recorder on iPhone?
We only found it on Google Play. BlackBox is on both the App Store and Google Play.
References
- Smart Voice Recorder — Google Play listing — SmartMob, checked Oct 25, 2026
- Smart Voice Recorder — Google Play ratings and reviews — Google Play, checked Oct 25, 2026
- BlackBox features and FAQ — BlackBox
More comparisons
Go deeper
Try BlackBox next to Smart Voice Recorder
Record all day or on a schedule, browse by the hour and transcribe on-device — no account, and your audio stays on your phone. Test it on your device first: background limits vary by phone.