AltitudeNow is a barometric altimeter and elevation-session logger for supported iPhones running iOS 17 or later.
AltitudeNow uses Apple's Core Motion framework to access the built-in barometric pressure sensor. The permission is needed for live relative-altitude and pressure readings. AltitudeNow does not use that permission to upload motion data.
Real live readings require a supported physical device with a barometric pressure sensor. The iOS Simulator and devices without supported barometer hardware cannot produce real CMAltimeter readings. AltitudeNow shows an explicit unsupported-device screen instead of inventing altitude values.
Open the iOS Settings app and review AltitudeNow's Motion & Fitness permission, then return to AltitudeNow. The app re-checks permission when it becomes active again.
Live altitude and pressure recording is available without Premium. Free users can browse their 3 most recent saved sessions and use the mountain/peak reference features.
Premium is a one-time non-consumable purchase. There is no subscription.
Open AltitudeNow → Settings → Premium → Restore Purchase while signed into the Apple ID that made the original purchase.
No. AltitudeNow 1.0.6 does not integrate with HealthKit, does not request Health access, and does not read or write Apple Health data.
GPS is not required for the core altitude recorder. Recorded sessions remain in the app's local storage. CSV files are created locally and leave the app only when you explicitly choose a destination in the system share sheet.
AltitudeNow is an informational elevation tool. It is not a certified navigation, aviation, emergency, or safety instrument.