---
title: "Compass One: Altimeter & GPS - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "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 loc"
---

# Compass One: Altimeter & GPS — United States
> Mark Your Travel Memories

![Compass One App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/ad/e7/30/ade73019-a54a-759e-bc60-541b56910cb5/AppIcon-0-0-1x_U007emarketing-0-11-0-85-220.png/434x0w.png)

**Developer:** [underwater](https://apptail.io/developer/underwater-WYoc)
**Category:** Travel
**Rating:** 4.9/5 (16 ratings)
**Price:** Free
**Bundle ID:** com.mammoth.compass
**Store:** Apple App Store
**Country:** United States
**Version:** 1.8.1 (released 2026-08-02)
**Original Release:** 2025-01-12
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6740374842)
**AppTail Page:** [https://apptail.io/app/compass-one-altimeter-gps-CKMu/united-states](https://apptail.io/app/compass-one-altimeter-gps-CKMu/united-states)

## Compass One Description
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: support@underwwwater.com

• Terms of Service (EULA): 
• Privacy Policy: 

## Compass One Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/19/55/b6/1955b6d2-b87a-3cbe-5cc2-e542dd0d3d8b/iPhone_Big_10.jpg/1242x2208.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/35/a4/5d/35a45d44-f647-ee7c-dbc6-e820aae872c3/iPhone_Big_6.jpg/1242x2208.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/18/10/bd/1810bd7f-972f-538e-78e5-ed73bff38eea/iPhone_Big_14.jpg/1242x2208.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/74/04/9b/74049b87-7156-3b58-a9e3-7c2bc0ff6c77/iPhone_Big_13.jpg/1242x2208.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/be/07/88/be0788e3-f1ae-7753-2301-f14bb0c5bcf3/iPhone_Big_12.jpg/1242x2208.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/f9/f9/35/f9f93534-4231-0b6d-0bca-40fdd9a5c6dc/iPhone_Big_9.jpg/1242x2208.png)

## Compass One Rating Breakdown in United States
- 5 stars: 14 (88%)
- 4 stars: 2 (13%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)

## Compass One Reviews in United States

### ***** "Nice one"
I’ve tried many compass / altimeter apps, and I gotta say I love this one the most. We all know that compass apps are no high-tech. So i think a lot of developers over-design it to make it look nicer to stand out. But tell you what, among all fancy looking ones this simple design stood out the most for me! Also the amount of features are just right (altitude, temperature and location and of course heading) though it may be nice to include wind direction and air pressure data. (But dont compromise the current simple design please!!). Love it. It’s unmatched. Well done!
-- OutdoorIsMyIndoor, 2025-01-17

[View all Compass One reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)





## Compass One Available In
- [United States](https://apptail.io/app/compass-one-altimeter-gps-CKMu/united-states)
- [India](https://apptail.io/app/compass-one-altimeter-gps-CKMu/india)
- [China](https://apptail.io/app/compass-one-altimeter-gps-CKMu/china)
- [South Korea](https://apptail.io/app/compass-one-altimeter-gps-CKMu/south-korea)
- [United Kingdom](https://apptail.io/app/compass-one-altimeter-gps-CKMu/united-kingdom)
- [Japan](https://apptail.io/app/compass-one-altimeter-gps-CKMu/japan)
- [Canada](https://apptail.io/app/compass-one-altimeter-gps-CKMu/canada)
- [Mexico](https://apptail.io/app/compass-one-altimeter-gps-CKMu/mexico)
- [Australia](https://apptail.io/app/compass-one-altimeter-gps-CKMu/australia)
- [Brazil](https://apptail.io/app/compass-one-altimeter-gps-CKMu/brazil)
- [Israel](https://apptail.io/app/compass-one-altimeter-gps-CKMu/israel)
- [Vietnam](https://apptail.io/app/compass-one-altimeter-gps-CKMu/vietnam)
- [Chile](https://apptail.io/app/compass-one-altimeter-gps-CKMu/chile)
- [Cyprus](https://apptail.io/app/compass-one-altimeter-gps-CKMu/cyprus)
- [Czechia](https://apptail.io/app/compass-one-altimeter-gps-CKMu/czechia)
- [Germany](https://apptail.io/app/compass-one-altimeter-gps-CKMu/germany)
- [Dominican Republic](https://apptail.io/app/compass-one-altimeter-gps-CKMu/dominican-republic)
- [Algeria](https://apptail.io/app/compass-one-altimeter-gps-CKMu/algeria)
- [Ecuador](https://apptail.io/app/compass-one-altimeter-gps-CKMu/ecuador)
- [Estonia](https://apptail.io/app/compass-one-altimeter-gps-CKMu/estonia)
- [Egypt](https://apptail.io/app/compass-one-altimeter-gps-CKMu/egypt)
- [Spain](https://apptail.io/app/compass-one-altimeter-gps-CKMu/spain)
- [Finland](https://apptail.io/app/compass-one-altimeter-gps-CKMu/finland)
- [Grenada](https://apptail.io/app/compass-one-altimeter-gps-CKMu/grenada)
- [Ghana](https://apptail.io/app/compass-one-altimeter-gps-CKMu/ghana)
- [Greece](https://apptail.io/app/compass-one-altimeter-gps-CKMu/greece)
- [Hong Kong SAR China](https://apptail.io/app/compass-one-altimeter-gps-CKMu/hong-kong)
- [Croatia](https://apptail.io/app/compass-one-altimeter-gps-CKMu/croatia)
- [Hungary](https://apptail.io/app/compass-one-altimeter-gps-CKMu/hungary)
- [Indonesia](https://apptail.io/app/compass-one-altimeter-gps-CKMu/indonesia)
- [Ireland](https://apptail.io/app/compass-one-altimeter-gps-CKMu/ireland)
- [Iceland](https://apptail.io/app/compass-one-altimeter-gps-CKMu/iceland)
- [Italy](https://apptail.io/app/compass-one-altimeter-gps-CKMu/italy)
- [Jamaica](https://apptail.io/app/compass-one-altimeter-gps-CKMu/jamaica)
- [Jordan](https://apptail.io/app/compass-one-altimeter-gps-CKMu/jordan)
- [Kenya](https://apptail.io/app/compass-one-altimeter-gps-CKMu/kenya)
- [Kuwait](https://apptail.io/app/compass-one-altimeter-gps-CKMu/kuwait)
- [Cayman Islands](https://apptail.io/app/compass-one-altimeter-gps-CKMu/cayman-islands)
- [Kazakhstan](https://apptail.io/app/compass-one-altimeter-gps-CKMu/kazakhstan)
- [Lebanon](https://apptail.io/app/compass-one-altimeter-gps-CKMu/lebanon)
- [Sri Lanka](https://apptail.io/app/compass-one-altimeter-gps-CKMu/sri-lanka)
- [Lithuania](https://apptail.io/app/compass-one-altimeter-gps-CKMu/lithuania)
- [Luxembourg](https://apptail.io/app/compass-one-altimeter-gps-CKMu/luxembourg)
- [Latvia](https://apptail.io/app/compass-one-altimeter-gps-CKMu/latvia)
- [Madagascar](https://apptail.io/app/compass-one-altimeter-gps-CKMu/madagascar)
- [North Macedonia](https://apptail.io/app/compass-one-altimeter-gps-CKMu/north-macedonia)
- [Mali](https://apptail.io/app/compass-one-altimeter-gps-CKMu/mali)
- [Malta](https://apptail.io/app/compass-one-altimeter-gps-CKMu/malta)
- [Mauritius](https://apptail.io/app/compass-one-altimeter-gps-CKMu/mauritius)
- [Malaysia](https://apptail.io/app/compass-one-altimeter-gps-CKMu/malaysia)
- [Namibia](https://apptail.io/app/compass-one-altimeter-gps-CKMu/namibia)
- [Nigeria](https://apptail.io/app/compass-one-altimeter-gps-CKMu/nigeria)
- [Norway](https://apptail.io/app/compass-one-altimeter-gps-CKMu/norway)
- [Nepal](https://apptail.io/app/compass-one-altimeter-gps-CKMu/nepal)
- [New Zealand](https://apptail.io/app/compass-one-altimeter-gps-CKMu/new-zealand)
- [Oman](https://apptail.io/app/compass-one-altimeter-gps-CKMu/oman)
- [Panama](https://apptail.io/app/compass-one-altimeter-gps-CKMu/panama)
- [Philippines](https://apptail.io/app/compass-one-altimeter-gps-CKMu/philippines)
- [Pakistan](https://apptail.io/app/compass-one-altimeter-gps-CKMu/pakistan)
- [Portugal](https://apptail.io/app/compass-one-altimeter-gps-CKMu/portugal)
- [Qatar](https://apptail.io/app/compass-one-altimeter-gps-CKMu/qatar)
- [Romania](https://apptail.io/app/compass-one-altimeter-gps-CKMu/romania)
- [Saudi Arabia](https://apptail.io/app/compass-one-altimeter-gps-CKMu/saudi-arabia)
- [Singapore](https://apptail.io/app/compass-one-altimeter-gps-CKMu/singapore)
- [Slovenia](https://apptail.io/app/compass-one-altimeter-gps-CKMu/slovenia)
- [Slovakia](https://apptail.io/app/compass-one-altimeter-gps-CKMu/slovakia)
- [Senegal](https://apptail.io/app/compass-one-altimeter-gps-CKMu/senegal)
- [Suriname](https://apptail.io/app/compass-one-altimeter-gps-CKMu/suriname)
- [Thailand](https://apptail.io/app/compass-one-altimeter-gps-CKMu/thailand)
- [Tunisia](https://apptail.io/app/compass-one-altimeter-gps-CKMu/tunisia)
- [Türkiye](https://apptail.io/app/compass-one-altimeter-gps-CKMu/turkey)
- [Taiwan](https://apptail.io/app/compass-one-altimeter-gps-CKMu/taiwan)
- [Uganda](https://apptail.io/app/compass-one-altimeter-gps-CKMu/uganda)
- [Uruguay](https://apptail.io/app/compass-one-altimeter-gps-CKMu/uruguay)
- [Uzbekistan](https://apptail.io/app/compass-one-altimeter-gps-CKMu/uzbekistan)
- [United Arab Emirates](https://apptail.io/app/compass-one-altimeter-gps-CKMu/united-arab-emirates)
- [South Africa](https://apptail.io/app/compass-one-altimeter-gps-CKMu/south-africa)
- [Armenia](https://apptail.io/app/compass-one-altimeter-gps-CKMu/armenia)
- [Argentina](https://apptail.io/app/compass-one-altimeter-gps-CKMu/argentina)
- [Azerbaijan](https://apptail.io/app/compass-one-altimeter-gps-CKMu/azerbaijan)
- [Belgium](https://apptail.io/app/compass-one-altimeter-gps-CKMu/belgium)
- [Bulgaria](https://apptail.io/app/compass-one-altimeter-gps-CKMu/bulgaria)
- [Bahrain](https://apptail.io/app/compass-one-altimeter-gps-CKMu/bahrain)
- [Brunei](https://apptail.io/app/compass-one-altimeter-gps-CKMu/brunei)
- [Botswana](https://apptail.io/app/compass-one-altimeter-gps-CKMu/botswana)
- [Belarus](https://apptail.io/app/compass-one-altimeter-gps-CKMu/belarus)
- [Belize](https://apptail.io/app/compass-one-altimeter-gps-CKMu/belize)
- [Switzerland](https://apptail.io/app/compass-one-altimeter-gps-CKMu/switzerland)

---

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