BlackBox vs Plaud: Phone App vs AI Recorder Device
Plaud is an AI work companion built around Plaud's own recorder devices: it captures meetings and calls, transcribes in 112+ languages, writes summaries and runs tasks with Plaud Agent, synced through Plaud's cloud. BlackBox needs no extra device — it turns the phone you already carry into an all-day or scheduled recorder with on-device transcription, but it doesn't write summaries.
We make BlackBox, so read this as informed rather than neutral. Every Plauddetail 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 Spot something out of date?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 Plaud: feature by feature
| Feature | BlackBox | Plaud |
|---|---|---|
| Platforms | ✓iPhone and Android | ◐Plaud device + iPhone, Android, web and desktop apps |
| Keeps recording with the screen off | ✓Yes — screen off, in your pocket, in other apps | –Not stated in listing |
| Built for all-day (24/7) recording | ✓Yes — press record once and it runs all day | –Not stated in listing |
| 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 | –Not stated in listing |
| Storage per hour of audio | ✓≈14.4 MB per hour | –Not stated in listing |
| Recording format | ✓AAC, 32 kbps mono, 16 kHz (tuned for speech) | –Not stated in listing |
| Works without an account | ✓No account | ✕Account-based; syncs across Plaud apps |
| Where your audio is kept | ✓On your phone; optional backup to your own Files / Drive folder | ✕Synced to Plaud's cloud |
| Transcription | ✓Yes — on-device, nothing uploaded | ◐Yes — 112+ languages; monthly minutes depend on plan |
| Speaker labels | ✓Yes — on-device | –Not stated in listing |
| AI summaries | ✕No | ✓Yes — summaries and Plaud Agent |
| 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 | ✓Plaud devices capture phone calls |
| Works with just your phone | ✓Yes — no extra device | ✕Built around a Plaud recorder device |
✓ 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 Plaud users complain about
Themes from 1–2★ App Store and Google Play reviews of the Plaud app we read in October 2026, paraphrased.
Plans on top of hardware
The largest theme: owners who bought a device and then found transcription minutes running out, with an ongoing plan needed to keep using the AI features.
Source: App Store reviewsCancelling and billing
Several reviewers describe difficulty cancelling plans bought outside the app store.
Source: App Store reviewsDevice reliability
Some report the recorder disconnecting from the phone, short battery life, fuzzy recordings or repeated beeping.
Source: App Store reviewsNeeds the device
A few reviewers didn't realise the app is designed around separate Plaud hardware, and missed being able to just record on their phone when the device was left at home.
Source: App Store reviewsWhen to pick Plaud instead
- You want AI summaries, follow-up drafts and reports generated from your conversations — BlackBox doesn't do this.
- You need to capture phone calls, which a Plaud device is designed for.
- You want a dedicated recorder separate from your phone, and transcription in 112+ languages.
- Your organisation needs the compliance Plaud lists (GDPR, HIPAA, SOC 2, ISO 27001).
When BlackBox fits better
- You don't want to buy, charge and carry another device — BlackBox uses your phone.
- You want recordings and transcripts to stay on your phone, with no account and no cloud.
- You want recording on weekday and weekend schedules or all day, without transcription minutes to ration.
- You want the library behind Face ID or a passcode.
Frequently asked questions
Can I get Plaud-style recording without buying a device?
Yes, for the recording and transcription part. BlackBox records in the background all day or on a schedule using your phone, and transcribes on-device. It doesn't produce AI summaries or agent tasks like Plaud.
Where does each app keep recordings?
Plaud's listing describes recordings and transcripts syncing across Plaud Mobile, Web and Desktop through its cloud. BlackBox keeps audio on your phone, with an optional backup to your own Files or Drive folder.
Can BlackBox record phone calls like a Plaud device?
No. BlackBox records the room around your phone, not the call line. Capturing calls is a genuine reason to choose Plaud.
References
- Plaud — App Store listing — PLAUD LLC, checked Oct 25, 2026
- Plaud — Google Play listing — PLAUD LLC, checked Oct 25, 2026
- Plaud — App Store ratings and reviews — Apple, checked Oct 25, 2026
- Plaud — Google Play ratings and reviews — Google Play, checked Oct 25, 2026
- BlackBox features and FAQ — BlackBox
More comparisons
Go deeper
Try BlackBox next to Plaud
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.