# Compass SG vs KoiApp

The clearest difference is in-app purchases: Compass SG at none against KoiApp's 4. KoiApp's advantage is device support (3 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. KoiApp sells 4 in-app purchases, starting at $4.99 per month. Compass SG asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Compass SG | KoiApp |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Size | 58 MB | 26 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HABITAP PTE. LTD](https://appshunter.io/developer/1131905342) | [Kai Bertelsen](https://appshunter.io/developer/6779963594) |

## What reviewers say

### Compass SG

[App page](https://appshunter.io/ios/app/compass-sg/id6443734346)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### KoiApp

[App page](https://appshunter.io/ios/app/koiapp-koi-and-pond-tracker/id6779963592)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KoiSoft Premium | $4.99 | per month |
| Extra storage | $7.99 | per year |
| KoiSoft Premium | $49.99 | per year |
| Studio images ×20 | $9.99 | one-time |


## Frequently asked questions

### Is Compass SG free?

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

### Is KoiApp free?

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

### Do Compass SG or KoiApp have ads?

Neither Compass SG nor KoiApp shows ads.

### Which is updated more often, Compass SG or KoiApp?

Compass SG ships an update every 2 months, and KoiApp every 2 months. Most recently, Compass SG was updated on November 7, 2026 and KoiApp on October 31, 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.*