Your journal stays on your phone.That’s the whole policy.

01Overview

Undertone is a voice journaling app for iPhone. It transcribes your recordings entirely on your device using bundled machine-learning models. This policy explains what the app handles and where it lives.

We built Undertone on a simple premise: a private journal should actually be private.

02What we don’t collect

Undertone does not collect, transmit, log or have access to:

• Your voice recordings. Audio never leaves your device.
• Your transcripts or journal text. Text is generated and stored locally.
• Your name, email or other identifiers. There is no account.
• Usage analytics. No analytics SDKs are included.
• Crash reports. No third-party crash reporting is included.
• Your location. The app never requests it.
• Advertising identifiers. Undertone shows no ads and joins no ad network.

There is no Undertone back-end and no database of user data, because no user data is sent to us.

03What stays on your device

Everything Undertone creates lives in the app’s private sandbox on your iPhone:

• Audio recordings, saved as .m4a files.
• Transcripts and entry text, in a local data store.
• Tags and metadata: titles, dates, durations and your tags.
• Preferences and model choice, stored on-device only.
• Whisper models, compiled and cached locally.

This data is protected by the iOS app sandbox and your device’s encryption. Deleting the app deletes it.

If you use backup, Undertone creates an export archive on your device and saves it wherever you choose, such as Files or iCloud Drive. Where it goes is entirely up to you.

04Permissions

• Microphone, to record entries. It’s active only while you are recording. Undertone does not record in the background.

No other permissions (location, contacts, camera, photos, Bluetooth and so on) are requested.

05Network use

Recording and transcription never use the network. Undertone ships with the Whisper Medium model built in, so it works fully offline from the moment it’s installed.

If you choose to download an optional model (Small or Large), the app fetches those model files from Hugging Face, where the open-source models are hosted. Like any download, that request reveals your IP address and basic device information to Hugging Face under their privacy policy. No recordings, transcripts or journal content are ever sent. If you never download an extra model, Undertone makes no network requests of its own.

Undertone does not include:

• Analytics platforms (Firebase, Mixpanel, Amplitude and similar)
• Advertising networks
• Cloud transcription APIs
• Social logins or identity providers
• Support-chat or feedback SDKs

Undertone uses WhisperKit, an open-source Swift framework, with OpenAI’s Whisper model weights. They run entirely on your device as offline assets. OpenAI has no visibility into your use of Undertone.

06Cost and purchases

Undertone is free. It contains no in-app purchases, subscriptions or ads, and we never receive payment or account information from you. Downloads are handled by the Apple App Store under Apple’s privacy policy.

07Children’s privacy

Undertone does not knowingly collect personal information from anyone, including children under 13. Because it collects no data at all, nothing a child records leaves the device.

08Changes to this policy

If this policy changes, we’ll update the date at the top of this page and, for material changes, mention it in the app’s release notes. We hold no contact details, so we can’t notify you directly.

Not collecting your data is a core product principle, not a legal formality. Any future change will be made in that spirit.

09Contact

Questions about this policy or how Undertone handles data? We’re a small, independent studio and happy to talk. Get in touch.

Jessing Labs · Seattle, WA