# Compass vs 海拔测量仪

The clearest difference is monetization model: Compass at free with in-app purchases against 海拔测量仪's subscription. Compass also leads on review sentiment (100% vs 89%). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Compass sells 4 in-app purchases, starting at $3.99 per 7 days and 海拔测量仪 sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Compass ships an update every 10 days, 海拔测量仪 every 9 days. The most recent releases landed on October 17, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Compass | 海拔测量仪 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 89.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 9 days** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 31 MB | 33 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [宽 汪](https://appshunter.io/developer/1737109141) | [艳 杜](https://appshunter.io/developer/1671675512) |

## What reviewers say

### Compass

[App page](https://appshunter.io/ios/app/compass-altimeter/id6483105242)

This app is a versatile outdoor tool offering compass navigation, real-time environmental data, and plant identification. It also includes practical gadgets, travel guides, and video tutorials for outdoor activities.

**Highlights:** Professional compass and navigation, Real-time altitude, pressure, and temperature, AI-powered plant identification, Outdoor travel guides and routes, Latitude and longitude positioning, Integrated outdoor gadgets (flashlight, ruler, spirit level)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Week Premium Membership | $3.99 | per 7 days |
| 1 Week Premium Membership | $6.99 | per 7 days |
| 1 Year Premium Membership | $24.99 | per year |
| Permanent Senior Member | $19.99 | one-time |


### 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 |


## Frequently asked questions

### Is Compass free?

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

### Is 海拔测量仪 free?

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

### Do Compass or 海拔测量仪 have ads?

Neither Compass nor 海拔测量仪 shows ads.

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

Compass ships an update every 10 days, and 海拔测量仪 every 9 days. Most recently, Compass was updated on October 17, 2026 and 海拔测量仪 on October 14, 2026.

---

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