# Realtime Altimeter — GPS Altimeter Without Network

> Offline GPS altimeter, compass, velocimeter, and watermark camera for travelers. (iPhone/iPad app by Zhenlai Xia.)

- Source: https://appshunter.io/ios/app/realtime-altimeter/id1039285626 (this page in markdown: same URL + `.md`)
- Developer: [Zhenlai Xia](https://appshunter.io/developer/1435731218)
- Category: Travel, Navigation
- Price: Free with in-app purchases
- Rating: 4.70/5 from 403 App Store ratings · 39 written reviews indexed
- Age rating: 4+
- Requires: iOS 13 · 6 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2015-09-20
- Data updated: 2026-08-24
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/realtime-altimeter/id1039285626/reviews.md

## What is Realtime Altimeter?

Check your real-time altitude even without network, Must-have App for travel. Also with free compass, velocimeter and barometer.

• Altimeter:  Always get your altitude even if you don't have network, it is useful when you are in some rural areas, mountains etc.

• Compass: Beautifully designed compass is integrated in this app.

• Velocimeter: Want to know your speed when you are walking, riding or in a car? simply open this app.

• Watermark Camera: Take photos with your altitude and GPS information, let's remember your adventure for ever.

## Key features

- Offline altimeter
- Real-time altitude
- Integrated compass
- Velocimeter for speed
- Watermark camera with GPS data

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Recent user reviews (10 of 39)

All indexed reviews: https://appshunter.io/ios/app/realtime-altimeter/id1039285626/reviews.md

### 5/5 — 记录生活的好帮手

*2026-08-04*

方便快捷，可以拍带海拔高度水印照片，给出行旅游增添了不少乐趣

### 5/5 — 简明实用还免费，值得赞扬！

*2026-02-14, version 3.3.6*

非常好

### 4/5 — WGS84？

*2024-10-06, version 3.3.6*

GCJ-02!

### 5/5 — 实时高度表就是好

*2024-09-26*

在进藏的过程中，同车的旅客使用了这个程序，介绍给我，经过使用感觉非常实用、非常好👍……解决了很多问题及注意事项。再次点赞👍

### 1/5 — Compass missing East and West etc.

*2022-11-01, version 3.2*

Look at the image of the “compass” in the App Store. It only has North and South. Totally missing are East, West, NE, SW etc. and all the cardinal points as are degrees. In short it is a beautifully designed decorative compass that can not perform even the most basic compass functions. Additionally it played 3 advertising videos for random products in the 60 seconds I spent changing the altitude settings from meters to feet.

### 3/5 — Accuracy issues

*2022-07-27, version 3.2*

The barometric pressure is incorrect. For example, at present, the actual pressure is 1015.58 mBars (or 29.99 inches), but the app says it’s 878.95 mBars. Not possible! The lowest ever recorded is 870. 

Also, an “inches” unit should be one of the barometric pressure settings.

### 2/5 — Altimeter? Hardly

*2021-06-02, version 3.2*

I’m sitting exactly 3 feet above sea level. So far , I’ve gotten readings any where between -19 ft to 30 ft. It never quits changing.

### 5/5 — 非常好用的软件

*2020-11-24*

对于一些户外运动软件来说，这个软件比较好用，特别是海拔高度的显示很喜欢💕

### 4/5 — Great app

*2020-11-18, version 3.2*

Use this flying my powered Hang glider. Would be perfect if the speed readout font could be larger. My old man eyes can’t see that well anymore🤣🤣

### 1/5 — intrusive

*2020-09-03, version 3.2*

loud and intrusive advertising. deleted instantly

## Frequently asked questions about Realtime Altimeter

### What does the Realtime Altimeter app do?

This app allows you to check your real-time altitude even when you don't have a network connection. It also includes a compass, a velocimeter to measure your speed, and a camera that can add watermarks with altitude and GPS information to your photos.

### Can I use the altimeter without an internet connection?

Yes, a key feature of this app is its ability to provide your altitude readings even when you are in rural areas, mountains, or other locations without network coverage. It relies on GPS for these measurements.

### What other tools are included in the app?

In addition to the altimeter, the app features a beautifully designed compass for navigation, a velocimeter to track your speed while walking, riding, or in a car, and a special camera function that lets you take photos with your altitude and GPS information embedded.

### Is this app free to use?

The app is free to download and use, but it does include in-app purchases and advertisements. This allows for continued development and the offering of additional features or an ad-free experience.

### Who would find this app most useful?

This app is a must-have for travelers, hikers, mountaineers, and anyone who frequently finds themselves in areas with poor or no cellular service. It's also useful for those who want to document their adventures with precise location and altitude data on their photos.

## Version history (last 5 releases)

### 3.4.0 — 2026-07-25

1. Improved front-camera photos on iPhone 17 for more consistent framing with the altitude watermark
2. Refined Settings and other UI details for clearer text and smoother presentation
3. Pinch to zoom with two fingers on the altitude camera

### 3.3.6 — 2024-10-06

1. reduce ads, better user experience

### 3.3.5 — 2024-10-03

1. fix bugs in iOS 18.

### 3.3.4 — 2024-10-02

1. fix bugs in iOS 18

### 3.3.3 — 2023-10-11

fix issue: camera does not work on some devices

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## More apps by Zhenlai Xia

- [宠物爱消除-超萌三消游戏](https://appshunter.io/ios/app/id617707267)
- [Candy Pop : Sweet Night](https://appshunter.io/ios/app/candy-pop-sweet-night/id617709081)
- [Pop Cat : Planet](https://appshunter.io/ios/app/pop-cat-planet/id726114926)
- [Bear Pop](https://appshunter.io/ios/app/bear-pop/id879724924)
- [Pop Octopus!](https://appshunter.io/ios/app/pop-octopus/id882225587)
- [Pop Sugar : Sweet Night & Crazy Candy](https://appshunter.io/ios/app/pop-sugar-sweet-night-and-crazy-candy/id896424658)

All apps by Zhenlai Xia: https://appshunter.io/developer/1435731218

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*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 2026-08-24.*