Tremor tells you about earthquakes the moment they're confirmed — not before they happen, but fast enough to matter. Track your own location for free, with no restrictions, watch over the people and places you care about anywhere in the world, and get clear, calm detail instead of panic.
MULTI-LOCATION WATCHING
Your own location is always covered — full-speed alerts, no restrictions, no paywall. Add more locations to watch parents across the country, family overseas, or a second home, each with its own label, radius, and alert threshold. (Free includes 1 location. Pro unlocks up to 10.)
ALERT LEVELS, DAY AND NIGHT
Pick how sensitive Tremor should be, from every noticeable tremor to only the major ones, and set quiet hours so small quakes don't wake you. Pro adds a free-form threshold slider plus a separate night-time level, so only the big ones break through overnight.
WIDGETS & LIVE ACTIVITY
Add Tremor to your Lock Screen or Home Screen to see the latest earthquake at a glance. When a significant quake strikes near a place you're watching, a Live Activity opens right on your Lock Screen and in the Dynamic Island — magnitude, distance, and aftershock count, updating live until it's over.
TSUNAMI INFORMATION
Tremor relays tsunami bulletins from NOAA's Tsunami Warning Centers (NTWC and PTWC), clearly labeled by level — from routine information statements up to active warnings — so you always know what's real. Notifications are free for everyone; Pro adds a live map layer with threat details.
PRIVACY BY DESIGN
Tremor never asks for background or always-on location access, only what's needed when you set up alerts. We store just an approximate area, about 2.5 km wide, never your exact address. No trail of everywhere you've been, because we never collect one.
TREMOR PRO
Pro is for people who watch over more than themselves:
• Up to 10 watched locations instead of 1
• A free-form alert threshold, plus a separate night-time level, for every location
• Full earthquake history and stats, not just the last 48 hours
• Every widget size, with your choice of which location to display
• Tsunami map layer with threat details
• Alternate app icons
WHAT TREMOR IS — AND ISN'T
Tremor reports earthquakes that have already happened, using data confirmed by USGS and EMSC, as fast as that confirmation reaches us. It is not an early-warning system, and it cannot predict earthquakes or alert you before shaking starts — no app can honestly promise that. What we do promise: clear, fast, honest information for the place you live, and everywhere else you're watching.
Download Tremor and know the moment it matters.
Support: https://alihanaktay-legal.github.io/tremor-legal/tremor-support.html
Privacy Policy: https://alihanaktay-legal.github.io/tremor-legal/tremor-privacy.html
Data: USGS, EMSC (earthquakes) · NOAA NTWC/PTWC (tsunami)
