An objective answer, in seconds
After living through an earthquake, many people keep feeling tremors that aren't there. Tremor Check turns your iPhone into a pocket seismograph: rest it on any surface and its motion sensors — far more sensitive than human perception — tell you whether that surface is really moving.
Made to calm, not to alarm
- A steady green "The ground is still" — the answer you'll see most
- Brief bumps explained with everyday causes (a truck, the washing machine, a door)
- Real sustained shaking measured with intensity and duration
- Apple Watch app: a tap on your wrist only when it's real
- Overnight vibration log — wake up and see that nothing happened
- Free. No ads. No accounts. No tracking. Works completely offline.
Hecho para calmar
Tremor Check fue creado por un sobreviviente de terremoto. Apoya tu iPhone en cualquier superficie y sabrás en segundos si tiembla de verdad. Gratis, privado, sin publicidad — y con alertas en tu Apple Watch solo cuando el movimiento es real.
Important: Tremor Check verifies whether the surface your iPhone rests on is vibrating. It is not an earthquake detection or early-warning service. For official seismic alerts, rely on your regional civil protection services.