# Su vs Compass

The clearest difference is in-app purchases: Su at none against Compass's 4. Su also leads on iOS requirement (8.0 vs 13.0). Compass's advantage is update cadence (every 9 days vs every 23 months). On price, ads and device support there is nothing between them.

Both are free to download. Compass sells 4 in-app purchases, starting at $3.99 per 7 days. Su asks for nothing beyond the download.

Su ships an update every 23 months, Compass every 9 days. The most recent releases landed on September 13, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Su | Compass |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 9 days** |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 35 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [takashi ishimoto](https://appshunter.io/developer/1491708628) | [宽 汪](https://appshunter.io/developer/1737109141) |

## What reviewers say

### Su

[App page](https://appshunter.io/ios/app/su/id1491709516)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Su free?

Su is free to download, with no in-app purchases.

### Is Compass free?

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

### Do Su or Compass have ads?

Neither Su nor Compass shows ads.

### Which is updated more often, Su or Compass?

Su ships an update every 23 months, and Compass every 9 days. Most recently, Su was updated on September 13, 2026 and Compass on October 2, 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.*