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TOOL 28

Vibration Meter (Seismometer Test)

A free vibration meter. See a live reading of how much your phone is shaking, in g-force, using its built-in motion sensors — handy for checking a washing machine, floor or surface. Not a calibrated seismometer.

Place your phone flat on the surface you want to check — a table, washing machine, floor. Not a calibrated seismometer — for rough vibration sensing only, not earthquake detection or safety decisions.

Check vibration in 2 steps

01
Tap Start

Allow motion access, then place your phone flat on the surface you want to check.

02
Read the live g-force

See the current vibration level and the peak reached during your session, updating live.

Where this helps

Washing machine or appliance checks

See if a machine is vibrating more than usual — a sign it might be unbalanced or need levelling.

Comparing surfaces

Check whether a floor, desk or shelf vibrates noticeably from nearby traffic, machinery or footsteps.

Curiosity about small tremors

Get a rough, relative sense of ground or surface vibration — not a substitute for official seismic monitoring.

Fun demonstrations

Show how sensitive a phone's accelerometer really is.

Benefits

More free utilities

Frequently asked questions

Is this a real seismometer?

No. This uses your phone's ordinary accelerometer, which is far less sensitive and not calibrated like real seismometers, which use specialised, heavily isolated sensors. Use this for rough, relative vibration checks (like a washing machine) — never to detect earthquakes or make any safety decision.

How is the vibration calculated?

It reads your phone's accelerometer (which includes gravity) and continuously separates out the slow-moving “tilt/gravity” part from the fast “shake” part, then reports the shake magnitude in g (where 1g is normal Earth gravity). This isolates actual vibration from you simply tilting or moving the phone around.

Why does it show 0 when I'm not touching my phone?

That's expected — if the surface it's resting on isn't vibrating, there's no shake component to detect, so the reading settles near zero.

Does this work on a laptop?

No — laptops don't reliably expose the motion sensors this needs. Open this page on a phone or tablet.

Is my data uploaded anywhere?

No. Everything is processed on your device in your browser and never sent to a server.

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