# 指南针, GPS经纬度定位 & 大气压海拔测量仪 vs 海拔测试仪

The clearest difference is in-app purchases: 海拔测试仪 at none against 指南针, GPS经纬度定位 & 大气压海拔测量仪's 1. 海拔测试仪 also leads on update cadence (weekly vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 指南针, GPS经纬度定位 & 大气压海拔测量仪 sells 1 one-off in-app purchase. 海拔测试仪 asks for nothing beyond the download.

指南针, GPS经纬度定位 & 大气压海拔测量仪 ships an update monthly, 海拔测试仪 weekly. The most recent releases landed on October 5, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | 指南针, GPS经纬度定位 & 大气压海拔测量仪 | 海拔测试仪 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6739829542/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 90.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | — | Free |
| Size | 20 MB | 13 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MCS Tech Co., Ltd](https://appshunter.io/developer/1585936484) | [观艳 谭](https://appshunter.io/developer/1745017384) |

## What reviewers say

### 指南针, GPS经纬度定位 & 大气压海拔测量仪

[App page](https://appshunter.io/ios/app/gps-and/id1663606955)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 高级会员永久解锁 | $3.99 | one-time |


### 海拔测试仪

[App page](https://appshunter.io/ios/app/id6739829542)

This app serves as a professional outdoor companion, offering real-time altitude measurement and a precise compass for navigation. It also features identification tools for plants and animals, along with GPS-based speed and location tracking.

**Highlights:** Real-time altitude measurement, Precise compass and GPS, Plant and animal identification, Location tracking, GPS speed measurement

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 指南针, GPS经纬度定位 & 大气压海拔测量仪 free?

指南针, GPS经纬度定位 & 大气压海拔测量仪 is free to download, with in-app purchases available.

### Is 海拔测试仪 free?

海拔测试仪 is free to download, with no in-app purchases.

### Do 指南针, GPS经纬度定位 & 大气压海拔测量仪 or 海拔测试仪 have ads?

Neither 指南针, GPS经纬度定位 & 大气压海拔测量仪 nor 海拔测试仪 shows ads.

### Which is updated more often, 指南针, GPS经纬度定位 & 大气压海拔测量仪 or 海拔测试仪?

指南针, GPS经纬度定位 & 大气压海拔测量仪 ships an update monthly, and 海拔测试仪 weekly. Most recently, 指南针, GPS经纬度定位 & 大气压海拔测量仪 was updated on October 5, 2026 and 海拔测试仪 on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*