Compass One: Altimeter & GPS
underwater Travel iPhoneiPadiPod touch
Compass One: Altimeter & GPS is a free Travel app for iPhone and iPad by underwater. Rated 4.9/5 from 16 ratings. Requires iOS 13.0. Updated August 2, 2026.
- Rating
- 4.9
- 16 ratings
- Price
- Free
- on the App Store
- Size
- 27 MB
- Age 4+
- Updated
- Aug 2
- 2026 · v1.8.1
Screenshots
About Compass One: Altimeter & GPS
Compass One is a FREE & AD-FREE app that focuses on precision and simple yet elegant design. It is truly a professional compass. Navigate EASY with Compass One; get handy information like current location (geographic coordinates, using gps), altitude, atmospheric pressure, current speed, current feels-like temperature in addition to precise pro compass. It works OFFLINE! Great for any outdoor activities such as hiking, camping, trekking, road trips, backpacking, cycling, fishing, driving, etc. The GPS technology will surely come in handy. Notable features: - Compass (8 cardinal directions) - Qibla Finder - easily find the direction towards the Kaaba in Mecca (Pro feature) - Custom Markers - you can add your current locations! Also comes with some world cities! (Pro feature) - Heading - Altimeter for altitude (elevation) info (Pro feature) - Atmospheric Pressure in various units like (hPa, psi, bar, mmHg, inHg) - Flash light with SOS mode for emergency and your Safety - Real-time (feels-like) temperature of your location - Current Location (DMS, UTM, DD) - Voice Compass - Current speed (speedometer) - Offline mode - and more coming! You can also choose the units for each measurement. For example, for current location, you can choose latitude and longitude (DMS), decimal degrees (DD), and UTM (or Universal Transverse Mercator). Disclaimer: this app heavily depends on the device hardware as well as location. Avoid using near metallic / magnetic objects. It is more accurate when used outdoor rather than indoor. If you have any questions or suggestions, please do not hesitate to contact us at: [email protected] • Terms of Service (EULA): https://www.underwwwater.com/terms1 • Privacy Policy: https://www.underwwwater.com/privacy1
Ratings & reviews
4.9
16 ratings
What’s new
Version 1.8.1 · Updated August 2, 2026
Thank you for using Compass One! Many of you requested a way to share saved markers with your friends. Now you can export / import markers from clipboard or from file. :) Enjoy Compassing!
App privacy
The developer, underwater, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to Compass One: Altimeter & GPS
Looking for apps like Compass One: Altimeter & GPS? Here are 6 similar apps on the App Store. The highest rated is Compass XL: GPS Navigation (4.7/5), and all 6 are free to download.
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Marker Compass: Landmarks
4.4
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Direction Compass Camera
3.0
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Compass XL: GPS Navigation
4.7
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Talk Compass
4.4
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Compass Pro - GPS Altimeter
4.2
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Best Compass™
4.7
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Compass One: Altimeter & GPS | 4.9 / 5 (16 ratings) | Free | August 2, 2026 | |
| Marker Compass: Landmarks | 4.4 / 5 (8) | Free | Aug 6, 2026 | Compare |
| Direction Compass Camera | 3.0 / 5 (5) | Free | Jun 23, 2025 | Compare |
| Compass XL: GPS Navigation | 4.7 / 5 (15) | Free | Apr 9, 2026 | Compare |
| Talk Compass | 4.4 / 5 (10) | Free | Jan 6, 2026 | Compare |
| Compass Pro - GPS Altimeter | 4.3 / 5 (16) | Free | Sep 22, 2025 | Compare |
| Best Compass™ | 4.7 / 5 (1,201) | Free | Dec 29, 2025 | Compare |