An on-device phone guard. The user sets a 4-digit PIN inside the app, then arms a "guard" screen and leaves the phone on a table. If the phone is lifted (accelerometer), the screen is touched, a wrong app PIN is entered, or the charger is unplugged, the app takes ONE still photo with the front camera, plays an alarm sound, and writes a local "evidence record" (photo, time, trigger type, how long the guard had been running, measured light level, and a small accelerometer trace called a motion signature). In the dark the screen flashes white once so the frame is usable. After a real trigger the app immediately locks to its PIN pad so the person who touched the phone cannot see the evidence. Records are shown in an evidence vault and can be deleted individually or all at once. Monetization: free to use; a single one-time non-consumable in-app purchase called "Pro" (product id wtmp_pro) unlocks an unlimited vault (free keeps the last 3 records), an activity report, the decoy screen (the phone appears switched off while guarding), and the alarm/charger triggers. There are no subscriptions, no accounts, no login, no ads. The app explicitly CANNOT see the device's system lock screen passcode attempts — this is stated inside the app. Permissions used: CAMERA (one frame per trigger), VIBRATE, INTERNET and com.android.vending.BILLING (used only to process the Google Play one-time purchase). It does not request location, contacts, microphone, storage, accessibility or usage-access permissions.