Hands off
my phone.
Arm it on a café table, in your bag or on the charger. If someone picks it up, moves it or pulls the charger, a loud siren starts, and only your PIN stops it. No account. Free with ads; a one-time Pro removes them.
Free · One-time Pro · Android 7.0 and later
Arm it.
Walk away.
Hear it.
How it works
Arm it in a second.
Your PIN stops it.
Four steps, and nothing to sign up for.
- 01Choose what to watchMotion, the charger, or a preset for a café, a bag or night charging.
- 02Set your PIN and armTap Arm. You get a few seconds to put the phone down before it starts watching.
- 03Moved or unplugged?The PIN screen shows for a short moment, then the siren starts, with flash and vibration and the volume kept up.
- 04Enter your PINYour PIN, fingerprint or face stops it. Every alarm is saved in the log on your phone.
Motion alarm
Pick it up?
The siren starts.
When the phone is picked up or moved, the siren starts after the arming delay you chose. Calibration sets the right sensitivity for the table it lies on.
- Arming delay you choose
- Calibrate in 5 seconds on any table
- Siren with flash and vibration
Charger alarm
Unplugged?
It rings.
Leave the phone charging at the airport or in a café. If someone pulls the cable, the siren starts.
- Free, with the motion alarm
- Pro: battery-full alert while charging
- Pro: arm itself when you plug in
Pocket and bag (Pro)
Out of the pocket?
Loud alarm.
Pro adds alarms for the phone taken out of a pocket or bag, earphones pulled out, a touch on the screen, and the SIM removed, plus one-tap presets.
- Pocket, earphones, touch and SIM alarms
- Presets: café, bag, night charge
- Arm at the times you set
Only you stop it
Only your PIN
stops the siren.
The siren goes on until your PIN is entered, or your fingerprint or face where the phone supports it. Your PIN is stored only as a protected hash.
- PIN, fingerprint or face
- PIN pad over the lock screen, if you allow it
- PIN stored as a salted hash, never as itself
Alarm log
Every alarm,
logged on your phone.
See when each alarm went off, what set it off and how it was stopped. The log stays on your phone.
- The last 7 days, free
- Pro: the full log with CSV export
- Delete everything in one place
And more
The small things,
done right.
How a move is told apart
Small shakes pass.
A pick-up doesn't.
While armed, PocketSiren compares the phone's movement with the level set by calibration. A table vibrating or a passing truck stays under it; picking the phone up crosses it and starts the siren.
- Calibrate: the phone measures its table for 5 seconds
- Small vibrations stay under the dashed line
- A pick-up crosses it: the PIN screen, then the siren
Illustrative example. The line moves with the sensitivity you choose.
Pricing
Free does the core job.
Pro is one payment.
Free: motion alarm with arming delay, charger alarm, PIN, fingerprint or face stop, calibration, siren with flash and vibration, and the 7-day log.
PocketSiren Pro
- Pocket and bag, earphones, touch, battery-full and SIM alarms
- One-tap presets: café, bag, night charge
- Arm itself when charging or at set times
- Your own siren sounds
- Stay armed after a restart
- Full alarm log with CSV export
One payment through Google Play, no subscription. Google Play shows the price in your currency. Google Play's refund policy applies.
No catch.
Privacy
Your phone, your alarm.
Your data stays on it.
Sensors are read in memory only while armed. The alarm log and your settings stay on the phone, and your PIN is kept only as a salted hash.
Only what the ad networks in the free version collect: the advertising ID, device and app information, ad interactions and an approximate location from your IP address, never sensor readings, your PIN or the alarm log. Payments are handled by Google Play; PocketSiren checks your purchase on the device. 隐私政策 →
Questions,
answered.
Can a thief just switch the phone off?
PocketSiren can't stop someone holding the power button. It makes noise so people notice; keep your phone's own screen lock and theft protection on too.
Will it go off when a bus passes?
Calibration measures the table for 5 seconds and sets the level, and you can change the sensitivity. Small vibrations stay under it; picking the phone up does not.
Why is there a notification while it is armed?
Android requires a visible notification for an app that keeps watching sensors with the screen off. It shows that the alarm is armed.
What if I forget my PIN?
Use your fingerprint, face or the phone's own screen lock where the phone supports it.
Does it track the phone's location?
No. PocketSiren has no location permission and never reports where the phone is. It is a loud alarm, not a tracker.
What do I get for free?
The motion alarm with an arming delay, the charger alarm, PIN, fingerprint or face stop, calibration, the siren with flash and vibration, and the 7-day log. The free version never expires; it shows ads, and Pro removes them.