Privacy Policy
Last updated: September 24, 2026
Contents
- Processing that stays on your device
- Removing photo metadata
- Access to your photos
- What is stored on your device
- How long data is kept and how to delete it
- Sharing
- Purchases and payment
- Information handled through Apple
- What the App does not use
- Children’s privacy
- Security
- Your rights
- Changes to this policy
- Contact
In short
- Your photos, the faces in them and your edits are processed entirely on your iPhone and are never sent anywhere.
- The only time the app talks to the internet is to confirm a Blurin Pro purchase (with Apple and RevenueCat).
- No ads, no account and no tracking of you across other companies’ apps or websites.
This Privacy Policy explains how the iPhone app “Blurin” (the “App”) handles your photos and information. The App is provided by Yuhei Koike (the “Developer”).
Processing that stays on your device
Everything involved in editing a photo happens on your iPhone. Photos are never uploaded to the Developer’s servers or to any third-party service.
- Face detection: Apple’s Vision framework, together with a head-detection model built into the App, finds the faces and heads in a photo.
- Background blur: machine-learning models built into the App (Core ML) tell people from the background and estimate depth.
- My Stickers: cutting a subject out of a photo uses Apple’s Vision framework.
- Every machine-learning model ships inside the App; nothing is downloaded from the internet to use them.
- Face and head detections are used only to decide where a mask goes and how big it is. Some effects also use the positions of the eyes and mouth to fit the mask; these are handled in memory while the photo is being processed and are never saved.
- The App does not create or store anything that could tell whose face it is (such as face templates or embeddings).
Removing photo metadata
When you save or share a photo, the App automatically removes the information embedded in the image:
- location (GPS)
- capture details such as the date and time, the camera model and its settings (EXIF, TIFF and maker-specific data)
- descriptive data such as author and caption (IPTC and similar)
Only the orientation is kept, so the picture displays the right way up.
Access to your photos
- To open a photo, the App uses the iOS photo picker. Only the photos you choose are handed to the App, so it does not ask for access to your whole photo library. Photos opened in Blurin from another app, such as Files, are handled the same way.
- To save a photo, the App asks only for “add only” access to your photo library. That permission does not let the App see the photos in your library.
- The App never reads your whole library and never accesses photos in the background.
- The App does not use the camera.
What is stored on your device
The App keeps the following on your iPhone, in its own private storage. None of it is sent to the Developer.
| What | Details |
|---|---|
| Recent photos (up to 10) | a copy of each photo you opened, a smaller copy used for detection, the thumbnail shown on Home, and your mask, tracing, background and crop settings |
| Background analysis | temporary data that lets a background blur reopen quickly (up to 10 photos; excluded from device backups) |
| My Stickers | stickers you cut out of photos (encrypted so they cannot be read while your iPhone is locked) |
| Presets | effect combinations you saved |
| Settings | theme colour, detection mode, the order of effects and similar choices |
| Display records | whether a tip or notice has been shown, whether a rating request has been shown, and the number of days of use it is based on |
| Purchase status | whether Blurin Pro is active |
| Temporary files | images made for batch processing or sharing (removed when batch processing is closed, or at your next save or share) |
How long data is kept and how to delete it
- Up to 10 recent photos are kept. When you open an 11th, the oldest is deleted automatically, together with everything that belongs to it.
- Deleting a photo on the Home screen deletes all of its files and settings.
- Deleting the App removes everything it stored from your device.
- Because of how iOS works, the App’s private storage may be included in iCloud Backup or a backup to your computer (the background analysis is excluded). You can manage backups in iOS Settings.
Sharing
Sharing uses the iOS share sheet. You choose where a photo goes (for example LINE, Instagram or Mail); the App never sends anything on its own. Once sent, the photo is handled under the privacy policy of the service you sent it to.
Purchases and payment
Blurin Pro purchases are processed by Apple through the App Store. The Developer never receives payment details such as card numbers or billing addresses.
To confirm purchases, manage Pro access and restore purchases, the App uses a service from RevenueCat, Inc. RevenueCat handles:
- an anonymous user ID that the App creates automatically (not tied to your name or email address)
- the products bought, purchase history, and transaction and receipt validation data
- entitlement status, country or region, and currency
This information is used only to provide Pro features, restore purchases and look into purchase problems. It is never used for advertising or tracking. Photos, face detections, edited images, presets and mask settings are never sent to RevenueCat. See RevenueCat’s privacy policy for how RevenueCat handles data.
Information handled through Apple
- Rating requests: the App may show Apple’s standard rating prompt. iOS decides whether and how often it appears, and the App never learns what rating you gave.
- Diagnostics: if you allow “Share With App Developers” in your iPhone settings, Apple provides the Developer with crash reports and aggregated usage figures. Apple handles this under its own privacy policy and does not provide it in a form that identifies you. You can change this in Settings → Privacy & Security → Analytics & Improvements.
What the App does not use
- advertising or the advertising identifier
- analytics services (such as Google Analytics or Firebase)
- third-party crash reporting tools
- social media SDKs (such as Facebook or X)
- accounts or sign-in
Children’s privacy
The App is designed to be used by people of all ages. It does not collect anyone’s photos, face data or edits, including children’s. Purchases on the App Store may require a parent’s approval under Apple’s rules, and purchase information is handled by Apple and RevenueCat as described above.
Security
- Everything the App stores is kept in its own private storage, which other apps cannot read.
- When your iPhone has a passcode, iOS encrypts the data on the device. My Stickers are additionally protected so they cannot be read while your iPhone is locked.
Your rights
Because your photos, face data and edits never reach the Developer, the Developer holds none of them to disclose, correct or delete. You can remove the data on your device at any time by deleting it in the App or deleting the App. For purchase information handled by Apple or RevenueCat, contact us and we will help as far as the law allows.
- EU and UK (GDPR): purchase information is processed to perform the contract of providing Pro features.
- California (CCPA): the Developer does not sell or share personal information (including for cross-context behavioral advertising).
- Japan (Act on the Protection of Personal Information): photos and face detections are handled only on your device; the Developer never acquires or holds them.
Changes to this policy
When this policy changes, the “Last updated” date on this page changes with it. Important changes will be announced in the App or in the App Store release notes. If a way of counting how the App is used is ever introduced, this policy will be updated and the change announced in the App before it takes effect. Advertising and tracking will not be introduced.
Translations of this policy are provided for convenience. If a translation differs from this English version, the English version prevails.
Contact
For questions about this policy, contact:
- Developer: Yuhei Koike
- Email: blurin.support@icloud.com