Privacy Policy

ScreenGuard for iPhone and iPad · Effective 17 October 2026 (version 1.5)

In short: ScreenGuard does not collect any personal data. There are no accounts, no analytics, no advertising and no tracking. Everything you set up and everything ScreenGuard measures stays on your iPhone.

Who is responsible

Martin Affolter, Zürich, Switzerland, the developer of ScreenGuard. Contact: support.screenguard@gmail.com.

What stays on your device

Screen Time access. ScreenGuard uses Apple's Screen Time framework (Family Controls) to block the apps and websites you choose. Apple only gives the app anonymous tokens for those apps; the developer cannot see which apps you chose or how you use them. Your Screen Time usage data never leaves your device.
Your settings and history. Your locks and their times, days off, lock history, Focus Score, streaks, blocked-app attempts and the name you enter are stored on your iPhone or iPad, in storage shared between ScreenGuard and its widgets and extensions. Only your locks can leave the device, and only if you turn on iCloud sync (see below).
Camera. If you use push-ups to unlock, the camera image is analysed live on your iPhone to count repetitions. No image or video is recorded, stored or sent anywhere.
Insights. Insights and your coach note are worked out on your iPhone, from your own history. Nothing is sent anywhere.
Notifications are scheduled locally on your iPhone; no push server is used.

What can leave your device

iCloud sync (optional, off by default). If you turn on Settings › Sync Locks with iCloud, your locks (their names, times and settings, and Apple's anonymous app tokens) are stored in your own iCloud account so they appear on your other iPhone and iPad with the same Apple ID. This uses Apple's iCloud; the developer has no server and cannot read this data. Your history, Focus Score, streaks and name are not synced. Turning sync off stops it; your iCloud data can be managed in iOS Settings › your name › iCloud.
Quotes. The short quotes on the blocked-app screen are built into the app. No request is made to load them (since version 1.3).
Purchases. Subscriptions and the lifetime purchase are processed entirely by Apple. The developer receives no payment details and no personal information about buyers. See Apple's privacy policy at apple.com/legal/privacy.
Crash reports. If you have enabled "Share with App Developers" in iOS Settings, Apple may share anonymous crash and usage reports with the developer. You can change this in Settings › Privacy & Security › Analytics & Improvements.

What we don't do

No user accounts, no advertising, no third-party analytics or tracking SDKs, no selling or sharing of data, no profiling.

Deleting your data

Your data exists only on your devices (and, with iCloud sync on, your locks in your own iCloud). Deleting ScreenGuard removes it from that device; turn off iCloud sync first to stop sharing locks between devices. Screen Time access can be revoked any time in Settings › Screen Time.

Children

ScreenGuard is a self-control tool for its own user and collects no data from anyone, including children.

Your rights

Under the Swiss Federal Act on Data Protection (FADP) and, where applicable, the EU GDPR, you have the right to information, correction and deletion. Since no personal data is held by the developer, there is nothing to hand over or delete beyond what is on your device; questions are welcome at the address above.

Changes

If this policy changes, the new version is published on this page with a new effective date.