The Altimeter+ altimeter calculates the altitude of your current location via a GPS, Aster or barometer measurement (for iPhone 6 and later). In addition to this, the app also provides an average calculation of GPS and ASTER altitude data as well as an integral map which shows peaks, a compass and a distance grid.

Features:
- Apple Watch support!
- Barometer altitude measurement (iPhone 6 and later)
- Altimeter with GPS or ASTER measurement
- GPS/ASTER average calculation
- Unit of measurement - imperial or metric
- Integral map with Apple maps and peak indicator, compass and distance grid
- Also functions without active GPS

Peak data from peakhunter.com