What Kaizen Timer does
Set a countdown, hand the phone over, walk away. When time expires, a full-screen lock appears that only your PIN (or biometric) can dismiss. No app-switching your way out, no “just 5 more minutes”. Zero ads, zero data collection.
Getting started
Install from Play Store, grant permissions, run your first timer.
Features
Timer, PIN, biometric, SOS extend, mute, warnings, presets, stats.
Pricing
Free is 9-min cap per session. Pro is $4.99 lifetime for unlimited.
Reference
Privacy policy (tl;dr: zero data collection), FAQ, troubleshooting.