Blurt for iPhone · updated 31 August 2026
Blurt records and transcribes on the device. There is no transcription server, so there is nothing for us to see, store, or hand over.
The promise
This is the load-bearing claim of the product, so it is the first one stated and the one everything below has to stay consistent with.
Recording uses your iPhone’s microphone. Transcription runs locally with whisper.cpp, and rewriting runs locally with a small language model. No audio and no transcript is sent to any server — not to Team Nebula, and not to anyone else.
There is also no analytics and no tracking. The app contains no analytics SDK. We do not know how often you use Blurt, what you dictate, or whether you opened it today.
Network
Not a category summary — the complete list. Three of the four never happen unless you opt into them.
| Call | When it happens | What it carries |
|---|---|---|
| Model download | Only when you choose to download a speech or rewriting model | The model request. No account, no content. |
| Licence validation | Only if you buy Blurt Pro | Your licence key and an app identifier. Never audio, text, or usage data. |
| Sign in | Only if you choose to create an account | The Apple or Google sign-in exchange, and a session token stored in the Keychain. |
| Vocabulary sync | Only if you signed in and turned sync on — both off by default | Corrected spellings and snippets, each capped at 64 characters. |
Buying Blurt Pro happens on whop.com in your browser, not inside the app. The app only ever validates the resulting key.
The keyboard
iOS asks for “Full Access” before a keyboard extension can read shared storage. Blurt needs it for exactly one thing: so the keyboard can read the transcript that your own Blurt app saved into the shared container on the device.
That is device-local data moving between two halves of the same app. The keyboard has no microphone access and sends nothing anywhere — it contains no networking code at all. Leaving Full Access off means dictation still works; the text just does not appear in place.
Accounts and storage
An account exists for one reason: syncing your vocabulary between your own devices. It is off until you turn it on.
You can sign in with Apple or with Google. Sync is a separate toggle from signing in, so an account alone sends nothing. Audio, transcripts, and your history stay on the phone either way. Apple and Google sign-ins are separate accounts until account linking ships.
Delete the app and everything beside this goes with it. If you turned sync on and want the synced profile removed from our side too, ask us and we will delete it.
Sharing
The share button on a take opens the standard iOS share sheet — Notes, Files, Journal, AirDrop, and so on. Nothing is shared until you pick a destination there.
Questions about any of this go to Team Nebula, who make Blurt. Help with using the app is on the Blurt support page.
