Undertone
Say it out loud.Keep it to yourself.
Undertone turns your voice into a private journal, transcribed entirely on your iPhone. Nothing is uploaded. Ever.
Your most honest thoughts deserve a private place to land.
Talk. Read it back.Keep it.
Speaking is faster than typing and closer to how you actually think. Undertone turns that into a journal you can read, search and return to.
Press record
Say whatever’s on your mind, for ten seconds or ten minutes.
Transcribed on your iPhone
Whisper runs on the Neural Engine. It works in airplane mode, because it never needed the internet.
Yours to keep
Every entry keeps its audio and its words, tagged and dated. Export the whole archive any time.
Everything you need.Nothing you don’t.
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Whisper, built in
OpenAI’s Whisper Medium ships inside the app. Download Small for speed or Large for accuracy.
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Truly offline
No server ever touches your audio or your words. There isn’t one.
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Calm by design
A quiet, distraction-free interface. Reading back feels like turning pages.
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Tags & search
Organise with your own tags and find any entry across your library, locally.
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Playback with waveform
Hear any entry alongside its transcript and scrub to the moment you want.
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Backup & restore
Export your whole journal as one archive and keep it wherever you choose.
Privacy isn’t a setting.It’s the foundation.
Some apps that promise on-device transcription still send your audio to a speech service. Undertone ships its own models, so your words become text in your hand and stay there.
- No cloud storage
- No crash-reporting SDKs
- No ads
- Microphone only while recording
We don’t have your data, so we can’t lose it, sell it or hand it over. The details are in our privacy policy.
Free.
Free to download, free to use. No ads, no subscription, no account — and nothing being sold, including you.
Download on the App StoreRequires iPhone · English transcription