The short version
Proof does not require an account. Your beliefs, revisions, proof entries, photos, and feed choices are stored on your iPhone. The app has no ads and does not sell your data. RevenueCat receives limited technical and purchase information so subscriptions can work. PostHog receives anonymous usage events so we can see which features are used. Neither service receives your written beliefs, proof text, or photos.
Information stored on your iPhone
Proof stores the information you create and the settings you choose:
- belief statements and their revisions;
- proof entries, dates, and believability ratings;
- photos you attach to proof entries;
- your reactions to beliefs in the feed;
- reminder time and widget privacy settings; and
- a limited widget snapshot used to show your current belief.
This information uses Apple's local storage systems. Proof does not currently use iCloud sync or a custom cloud database. Depending on your iPhone backup settings, Apple may include app data in a device backup. Apple controls those backups under its own terms and privacy policy.
Photos and the camera
You can attach a photo to a proof entry, either from your photo library or by taking one with the camera. Proof only uses the camera when you open it from the app, and only reads the photos you pick. Photos are resized and stored with your other Proof data on the iPhone. They are not uploaded anywhere by Proof. If you share a proof, the image you approved in the preview is what leaves the app.
Rewriting beliefs
On supported devices, Proof can use Apple's on-device Foundation Models framework to suggest new wording. The app also has a guided rewrite that works without a model. Proof does not send your authored text to a server operated by JPM Inc., and it does not keep a remote transcript of your writing.
Subscriptions and RevenueCat
Proof uses Apple's App Store for billing and RevenueCat to check whether Proof Premium is active. RevenueCat creates an anonymous app user identifier and may process purchase history, subscription status, app and device details, IP address, and related diagnostic information needed to provide the subscription service. Proof does not give RevenueCat your beliefs or proof entries.
Apple and RevenueCat handle this information under their own policies:
Usage analytics and PostHog
Proof uses PostHog to count anonymous usage events, such as finishing onboarding or turning a reminder on. Automatic capture is switched off: no session recordings, no screen recordings, and no automatic logging of taps. Events never include your beliefs, proof text, or photos. Setup steps, reaching the paywall, and purchase steps are always counted anonymously. In setup that includes whether you saved or skipped your first proof, and which of the three suggested lines you tapped (its position, never the words). Every other event follows the analytics toggle in Settings. PostHog processes this information under its own Privacy Policy.
Widgets and reminders
Widgets read a small file in a private App Group shared by Proof and its widget extension. You can hide your belief in widgets; when hidden, the widget shows a neutral prompt instead. The morning and evening reminders are local iPhone notifications. The evening reminder never contains your proof text, and you can keep your belief out of the morning one by hiding it in widget settings.
Sharing
Sharing is optional. Proof creates the image or video on your device and shows you a preview first. Once you use the iOS share sheet, the service or person you choose receives what you send. Their privacy practices apply after the content leaves Proof.
Deleting your data
In Proof, open Settings and choose Delete all Proof data. This removes your authored records, reminders, and widget content from the iPhone. It does not cancel a subscription or erase purchase records kept by Apple or RevenueCat. Removing the app also removes its local data, although an existing Apple device backup may remain until Apple deletes or replaces it under your backup settings.
Website visits and support email
This policy is hosted on jamesmckinney.xyz. The website may use Google Analytics to collect basic browser, device, and visit information when analytics is enabled. Google explains how it handles that information in its Privacy Policy. If you email for support, the email address, message, and anything you attach will be received and used to answer you. Please do not include private belief or proof text unless it is necessary to explain the problem.
Children
Proof is not directed to children under 13, and JPM Inc. does not knowingly collect personal information from children under 13 through the app.
Changes to this policy
If Proof's data practices change, this page will be updated and the date at the top will change. A material change may also be explained in the app or its App Store listing.
Contact
Proof is offered by JPM Inc. Questions about privacy can be sent to james@jamesmckinney.xyz.