Privacy Policy

Last updated: September 26, 2026

StackWorks (the “Developer”) has established this Privacy Policy to explain how the iOS app Kotsu Camera (the “App”) handles users' information.

1. Camera

The App uses the camera to take photos and to give advice on composition, level and brightness. The camera feed is analyzed on your iPhone using Apple's Vision and Core Motion frameworks (to detect the position of faces, people, animals and prominent objects, as well as the horizon, brightness, blur and smudges on the lens). Neither the camera feed nor the results of this analysis are sent to the Developer's servers or to any third party.

2. Photos

Photos you take are saved using “add-only” access to the Photos app. The App does not read any photos in the Photos app. The reference photo taken in Take My Photo (the photo used as the faint overlay) is not saved and is deleted when you end Take My Photo. Photos from a burst that you don't keep are also deleted.

If the App is not allowed to save to the Photos app, the photos you take are kept in the App's temporary storage so that you can share or save them.

For photos taken from the Lock Screen: if the App is allowed to save photos, they are added to the Photos app right away. If not, they are kept in the storage used by the Lock Screen camera and added to the Photos app the next time you open the App.

The App does not add location data to photos. The App does not ask for permission to access your location.

3. Feedback after you take a photo

Feedback is created from the results of the analysis at the moment you took the photo (such as the scene, tilt and subject position). On supported devices, the wording is refined using Apple's on-device language model (Foundation Models). This processing also takes place on your iPhone, and nothing is sent outside it.

4. Settings stored on your device

The App stores your scene, tip level, Auto Shutter and display settings, the number of photos you've taken, and the number of times you've used Take My Photo that day on your iPhone (in UserDefaults). So that the Lock Screen camera works with the same settings, these settings are passed to the App's extension through an Apple framework (App Intents).

5. Network communication

The only network communication the App makes is for In-App Purchases (Apple's StoreKit). Purchases are processed by Apple, and the Developer does not receive your payment information.

6. Children

The App does not knowingly collect information from children. When taking photos of children, please use the App at the discretion of a parent or guardian.

7. Deleting your data

When you delete the App from your iPhone, its settings and any photos in its temporary storage are removed. Photos saved to the Photos app can be deleted in the Photos app.

8. Changes

If this policy changes, the Developer will announce it on this page.

9. Contact

If you have any questions about this policy, please contact us at the following address:
contact@stack-works.dev