Precise altitude with barometric calibration, climb and descent rate, an Apple Watch app and tour recording – all in one app. No tracking, no ads.
Offline. No ads. No tracking. Now Altimeter collects no personal data and shares nothing – the App Store privacy label explicitly reads “Data Not Collected”. GPS and barometer run exclusively on your device.
Version 3.6 turns the GPS altimeter into a barometric one: calibrate it once, read it precisely – and always see where the number is coming from.
Tap the altitude and enter a value you know – a summit marker, a trail sign, your own address – or the QNH from a weather report. The app then works barometrically, to within a few metres instead of the 10 to 30 of plain GPS.
Vertical speed in m/min or ft/min, right next to the air pressure. The number ski touring, mountaineering and paragliding actually think in.
Below the altitude it says where it comes from: “GPS · ±12 m” or “Barometric, calibrated”. No more numbers without context.
Ascent and descent used to come from GPS altitude and collected all of its noise. They now come from the pressure sensor – a tour recorded while sitting still no longer books any elevation at all.
Three pages show what the app can do the first time you open it – and that your first three tours are free.
Six atmospheric backdrops turn your altimeter into a true experience – from alpine panorama to mountain lake to waterfall. A different image for every tour.
The lock screen widgets show your current altitude right next to the clock – as a circle, a rectangle or a single line. No tapping, no opening: your altitude is simply there.
The native Now Altimeter app for Apple Watch shows altitude, air pressure and coordinates straight on your wrist – no need to pull out your iPhone. Plus watch face complications and tour recording you start and stop from the watch.
Small, medium and large for your home screen, plus the compact lock screen formats. Altitude, coordinates, air pressure and compass heading always at hand – without ever opening the app.
Adjust font size, colours, transparency and background images however you like, and save as many designs of your own as you want. The design editor is part of Pro.
Track barometer trends in real time. The history graph for the last 60 minutes, with minimum, maximum and change, helps you spot weather shifts early. Right above it sits your climb and descent rate.
Tap REC, start walking, done. Your first three tours are free. Ascent and descent come from the pressure sensor instead of GPS noise – elevation numbers that actually hold up. Recording keeps running in the background, even with the display switched off.
After every tour: a detailed map view of your route with the full elevation profile, peak altitude and duration. Export it as GPX – compatible with Strava, Komoot and Garmin Connect.
For serious outdoor adventures
Plain GPS scatters by 10 to 30 metres depending on reception. Calibrate the altitude once against a value you know – a summit marker, a trail sign, your own address – or enter the QNH from a weather report, and Now Altimeter works barometrically and shows altitude to within a few metres. The line below the number always tells you which source is currently active.
Free: live altitude, coordinates in DMS, decimal degrees and UTM, six background designs, the home and lock screen widgets, and your first three recorded tours including map, elevation profile and GPX export. Pro unlocks altitude calibration, climb and descent rate, the barometer, the compass, unlimited tour recording, the Apple Watch app and the design editor.
Yes – Now Altimeter works fully offline. GPS and barometer run locally on the device. No Wi-Fi or cellular connection required. Perfect for alpine regions and areas without coverage.
Yes – Now Altimeter Pro includes a native Apple Watch app. You see altitude, air pressure, compass and coordinates straight on your wrist, start and stop tours from the watch, and can put complications on your watch face.
GPS provides absolute altitude above sea level but scatters noticeably when reception is poor. The barometer sensor detects changes in altitude very precisely but has no reference point – that's what you supply when you calibrate. QNH is the air pressure from a weather report reduced to sea level. Now Altimeter stores it, so your calibration survives a restart of the app.
Yes – the first three tours for free, unlimited with Pro. One tap on REC is enough. The app saves ascent, descent, peak altitude, the route and duration; afterwards you see route and elevation profile in detail on the map. Ascent and descent are calculated from the pressure sensor, not from GPS altitude.
Yes. Every recorded tour can be shared as a GPX file – compatible with Strava, Komoot, Garmin Connect and any other software that reads GPX. Export works for the three free tours too.
Now Altimeter is free. Now Altimeter Pro costs €2.99 per month or €22.99 per year – around 36% less than twelve monthly payments. The subscription renews automatically and can be cancelled at any time in your Apple ID settings.
Now Altimeter requires iOS 17.0 or later.