Motion awareness on iPhone

Tremor Tracker.
Movement in view.

A live view of local motion, an alert for sustained shaking and recent earthquake information — in a calm, readable iPhone app.

Place your iPhone on a stable surface, flat or in a suitable charging stand, and keep the app open while monitoring.
Adjust sensitivity and view actual detection scores, live traces and recorded events.
Use local sound, flash and whistle controls from one screen.

Read the story Explore features

Local measurements and catalogue context do not predict earthquakes or establish danger. Alerts can be false or missed. Sound and light controls do not contact emergency services or guarantee reception.

Tremor Tracker main screen with actual detection score out of 100 and live motion trace

The story

A thoughtful way to observe movement.

Tremor Tracker brings the iPhone’s motion readings into view. Start monitoring on a stable surface, let the detector calibrate, and explore how sustained movement differs from the surrounding background.

Notice sustained motion

The detector considers the motion pattern, duration and background noise. When its conditions are met, it can sound an alert. Sensitivity adjusts the movement thresholds so you can choose the setting for your setup.

Designed with care

The main screen stays dark and readable. Live traces and expandable measurement panels give a clear overview, with deeper detector and catalogue details available when you want them.

Set it down, start monitoring, and let the display dim.

Place the iPhone flat on a stable surface or upright in a suitable charging stand. Use external power for longer sessions. After calibration and the selected Sleep Delay, the app can dim its display while remaining open in the foreground. Locking the phone or leaving the app can interrupt measurement and alerts.

Special features

Measurements, context and practical controls.

One focused interface for live motion, adjustable local alerts, recorded evidence and optional signaling tools.

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Motion monitoring

Calibrate to the local background and view device motion on a live trace. Sleep Mode dims the app display while it stays in the foreground.

Local alerts

The existing local and catalogue-supported alarm routes detect qualifying sustained movement. Choose sensitivity and local delay in Settings.

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Readable insight

Actual algorithm scores appear as points out of 100. The score is not an earthquake probability, and starting an alarm does not raise it.

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Signaling Function

Play an SOS sound, flash the light or use a whistle sound. A Stop All control ends these local outputs.

At-a-glance status

Power and communication indicators give a quick view of the available services. The alert and signaling screens share the same five indicators. LOC describes an available location fix; it does not establish an exact position or successful signal delivery.

Recent earthquakes on the map

Browse recent USGS/NEIC, GFZ GEOFON and EMSC catalogue events. The map and event details add context to local readings. A possible catalogue match does not prove what caused the phone to move.

A clear main screen built for quick understanding.

A large detection score, live seismograph and direct monitoring control put the essential information in view. The calculated score is displayed unchanged, including when an alarm starts.

Scores such as 55/100 are algorithm points, not a probability.
Large type and strong contrast for low-light use.
A live trace shows the phone’s measured motion.

Main monitoring screen with an actual detection score out of 100.

Technical detail when you want it.

Open the measurement panels to inspect motion components, background noise, timing and the detector’s evidence. Recorded alarms retain their calculated scores.

Expandable local measurement panels.
Sensor values and detector settings available for inspection.
Exportable logs for your own review.

Alert controls within reach.

The alert screen combines a torch control and a prominent snooze button. A motion alarm reports that the detector conditions were met; the app does not establish the cause or level of danger.

Alert controls, shown without a real earthquake event.

Sound and light from one screen.

Signaling Function keeps the sound, flash and whistle controls together. Use them separately and stop them together. These are local outputs, with no automatic call or message to emergency services.

SOS sound and flashing light when the device supports them.
Whistle playback and a clear Stop All control.
Adjust playback with the native volume control.

Signaling Function with sound, light, whistle and Stop All.

Live measurements when you want an overview. Detailed evidence when you want to look closer.

Seismic context

See what has been happening around you.

Explore recent earthquake catalogue entries from USGS/NEIC, GFZ GEOFON and EMSC. Location is used for earthquake distances and map context.

Local sensing, wider context

USGS/NEIC, GFZ GEOFON and EMSC are monitored independently. A matching P- or S-wave arrival within 500 km can be used from whichever source reports it first. Unavailable sources are skipped and retried after 60 seconds. Alarm logs retain the matching sources and any missing confirmation; a possible match does not establish causation.

Latest 24 hours

Browse the most recent catalogue window and inspect event details, magnitudes and provider information. Provider credits and licence notices remain available in the app and exported alarm evidence.

Screens

A closer look at the experience.

A calm main screen, direct alert controls and a separate sound-and-light signaling screen.

Main monitoring screen with the actual detection score and live trace.

Signaling Function with sound, flash, whistle and Stop All.

APP STORE

Tremor Tracker for
iPhone

Live motion measurements, adjustable local alerts and recent earthquake information in one clear view. Explore the readings, review recorded events and keep practical sound and light controls close at hand.

Tremor Tracker.Movement in view.