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

> Offline compass, GPS, altimeter, and weather data for outdoor navigation. (iPhone/iPad app by underwater.)

- Source: https://appshunter.io/ios/app/compass-one-altimeter-and-gps/id6740374842 (this page in markdown: same URL + `.md`)
- Developer: [underwater](https://appshunter.io/developer/1532361507)
- Category: Travel, Navigation
- Price: Free with in-app purchases
- Rating: 4.90/5 from 15 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 27 MB
- Languages: American English
- Released: 2025-01-12
- Data updated: 2026-09-06
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/compass-one-altimeter-and-gps/id6740374842/reviews.md

## What is Compass One?

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): https://www.underwwwater.com/terms1
• Privacy Policy: https://www.underwwwater.com/privacy1

## Key features

- Offline navigation
- GPS coordinates and altitude
- Atmospheric pressure readings
- Flashlight with SOS mode
- Real-time temperature
- Customizable location markers

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Compass One Pro | $9.99 | per 7 days |


## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/compass-one-altimeter-and-gps/id6740374842/reviews.md

### 4/5 — Useful

*2025-02-09*

gooooooooood

**Developer response:** Haha Thank yoooooooooou!

Let us know if you have any suggestions or feedbacks 🤩

Thanks,

### 5/5 — A Must-Have for Outdoor Adventures

*2025-02-05*

This compass app is absolutely fantastic! It’s accurate, easy to use, and works even when I’m off the grid. Whether I’m outdoor (hiking or camping), it gives me useful data. Nice design too. If you spend time outdoors, this app is a lifesaver.

**Developer response:** Dear user, thanks for your review! We have many updates planned so please stay tuned 💪💪💪

### 4/5 — Life saver

*2025-02-05*

I got this app on a whim, not expecting much - just a compass. But oh god, glad i did. In my last hiking, the app’s markers feature saved my life!! Also the needle is beautiful and smooth almost hypnotic. Add more info to markers like distance and custom names and it’ll be even better.

**Developer response:** Thank you for your review 🙏 Glad to hear that the markers were useful! We have many updates planned, so please stay tuned 💪💪💪

### 5/5 — Pretty good

*2025-01-24*

Simple and accurate

**Developer response:** Thanks for your review! We have many updates planned, so stay tuned 💪💪

### 5/5 — Nice one

*2025-01-17*

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!

**Developer response:** **Atmospheric pressure added!**

Thank you so much for your nice review ❤️. Yeah, I like simple designs too! Especially when it really doesn’t need to be complicated!

I’m glad i can tell you that the air pressure data is now included! Hope you like it!

Thanks 😊

## Frequently asked questions about Compass One

### What is Compass One?

Compass One is a free and ad-free travel app that provides a professional compass, GPS coordinates, altitude, atmospheric pressure, and real-time temperature. It's designed for precision and ease of use during outdoor activities.

### Does Compass One work offline?

Yes, Compass One works offline, making it a reliable tool for navigation and information gathering even without an internet connection. This is particularly useful for hiking, camping, and road trips.

### What are the Pro features in Compass One?

Pro features include a Qibla Finder to locate the Kaaba in Mecca, custom markers to save favorite locations, and an altimeter for detailed elevation information. These enhance the app's utility for specific travel and religious needs.

### How accurate is Compass One?

Compass One focuses on precision and depends heavily on device hardware and location services. For best results, it is recommended to use the app outdoors and away from metallic or magnetic objects.

### What devices is Compass One available on?

Compass One is available on iPhone, iPad, and iPod devices. It is designed to leverage the capabilities of Apple's mobile hardware for its navigation features.

### What is the pricing for Compass One Pro?

Compass One Pro is available through a subscription plan costing $9.99 per 7 days, with a 3-day free trial. This unlocks advanced features like the Qibla Finder and custom markers.

### How often is Compass One updated?

The latest version of Compass One is 1.7.5, and it was last updated on December 23, 2025. This indicates a relatively active development cycle, with new features and improvements likely to be added.

### What is the age rating for Compass One?

Compass One has an age rating of 4+, making it suitable for a wide range of users, including children. The app's focus on navigation and safety tools is appropriate for this age group.

## Version history (last 5 releases)

### 1.8.1 — 2026-08-02

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!

### 1.7.5 — 2025-12-23

Thank you for using Compass One! This update includes minor changes to enhance your experience. We appreciate your support and feedback.

### 1.7.4 — 2025-08-17

Thank you for using Compass One! This update includes performance improvements to enhance your experience. We appreciate your support and feedback.

### 1.7.3 — 2025-08-05

Thank you for using Compass One! This update includes minor bug fixes and performance improvements to enhance your experience. We appreciate your support and feedback.

### 1.7.2 — 2025-07-29

Thank you ADVENTURERS for using Compass One! We've added a new page to view and edit the details of each marker.

## Apps similar to Compass One

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Compass: Elevation & Altimeter](https://appshunter.io/ios/app/compass-elevation-and-altimeter/id6743296198) | 4.5 (11) | Free | Travel |

## More apps by underwater

- [R.LERTS for QLD](https://appshunter.io/ios/app/rlerts-for-qld/id6566171913)
- [Qibla & Circles: Salahs Logged](https://appshunter.io/ios/app/qibla-and-circles-salahs-logged/id6740764008)
- [Facechat AI: Chatbot Assistant](https://appshunter.io/ios/app/facechat-ai-chatbot-assistant/id6742225421)
- [R.LERTS for NSW](https://appshunter.io/ios/app/rlerts-for-nsw/id6744289023)
- [R.LERTS for WA](https://appshunter.io/ios/app/rlerts-for-wa/id6747128206)

All apps by underwater: https://appshunter.io/developer/1532361507

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-06.*