# 海拔测量仪 vs Compass

The clearest difference is review sentiment: 海拔测量仪 at 89% against Compass's 29%. Compass's advantage is monetization model (free with in-app purchases vs subscription) and iOS requirement (13.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 海拔测量仪 sells 3 in-app purchases, starting at $4.99 per 7 days and Compass sells 5 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

海拔测量仪 ships an update every 9 days, Compass every 2 weeks. The most recent releases landed on October 14, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | 海拔测量仪 | Compass |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (39 ratings)](https://appshunter.io/ios/app/compass-gps-positioning/id6745016117/reviews)** |
| Number of ratings | — | **39** |
| Positive reviews | **89.5% of reviews** | 28.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 33 MB | 9 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [艳 杜](https://appshunter.io/developer/1671675512) | [嘉 罗](https://appshunter.io/developer/1763191933) |

## What reviewers say

### 海拔测量仪

[App page](https://appshunter.io/ios/app/id6499491694)

This app provides real-time outdoor data including altitude, weather, and location for activities like hiking and camping. It features a compass, route tracking, and a speed detector. Users can also take photos with custom data watermarks to share with friends.

**Highlights:** Real-time altitude and weather data, Compass for accurate direction, Route and altitude change recording, Speed detection for running/cycling, Photo watermarking with data, GPS location, pressure, UV index

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 专业版包周 | $4.99 | per 7 days |
| 专业版包月 | $9.99 | per month |
| 专业版包年 | $29.99 | per year |


### Compass

[App page](https://appshunter.io/ios/app/compass-gps-positioning/id6745016117)

Navigate outdoors with a precise compass, level tool, and real-time weather updates. Receive extreme weather alerts and capture photos with location-based watermarks. Optimized for low power consumption and offline use.

**Highlights:** Precision compass with GPS data, Smart level tool, Real-time weather monitoring, Extreme weather alerts, Watermark camera, Offline functionality

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 指南针服务 | $9.99 | per 7 days |
| zhinanzhen | $9.99 | per 7 days |
| zhinanzhen | $9.99 | per 7 days |
| zzsub | $19.99 | per month |
| zzsub | $29.99 | per 3 months |


## Frequently asked questions

### Is 海拔测量仪 free?

海拔测量仪 is free to download, with in-app purchases available.

### Is Compass free?

Compass is free to download, with in-app purchases available.

### Do 海拔测量仪 or Compass have ads?

Neither 海拔测量仪 nor Compass shows ads.

### Which is updated more often, 海拔测量仪 or Compass?

海拔测量仪 ships an update every 9 days, and Compass every 2 weeks. Most recently, 海拔测量仪 was updated on October 14, 2026 and Compass on October 16, 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.*