Privacy Policy

Last Updated: March 2026

DASTO ("we," "us") is committed to protecting your privacy. This policy explains how ButterLens handles your data.

1. Device Permissions We Request

ButterLens only requests the following two device permissions, with clear and specific purposes:

• Camera: For live viewfinder and capturing photos with the butter tone effect applied.
• Photo Library: For saving captured photos to your device's photo library. We only write — we never read your existing photos.

2. Data Processing Within the App

Camera image data is processed locally on your device in real time by the Skia rendering engine, applying color filters before saving to your library. The entire process is fully on-device, without network access or intermediate data storage.

3. Data We Do Not Collect or Store

• Name, email, account, or other personal identifiers
• Location data
• Usage analytics data
• Crash reports
• Any copies of photos you take

4. Feedback

If you send feedback via email, the address and message content you provide is used solely to reply to your inquiry. It will not be used for any other purpose or shared with third parties.

5. Children's Privacy

ButterLens is not directed at children under 13. Since we collect no personal data, there is no data privacy risk for children using the app.