# Formosanus vs Tamsui Go

The clearest difference is update cadence: Tamsui Go at monthly against Formosanus's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Formosanus sells 1 one-off in-app purchase and Tamsui Go sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Formosanus ships an update every 2 months, Tamsui Go monthly. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Formosanus | Tamsui Go |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 12 MB | 95 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yu Tse Wu](https://appshunter.io/developer/1032252133) | [YA LING HUANG](https://appshunter.io/developer/1870614380) |

## What reviewers say

### Formosanus

[App page](https://appshunter.io/ios/app/formosanus/id1056896515)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 百岳 | $0.99 | one-time |


### Tamsui Go

[App page](https://appshunter.io/ios/app/tamsui-go/id6758054019)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 小小心意 | $0.99 | one-time |
| 維護能量 | $1.99 | one-time |
| 在地更新支持 | $3.99 | one-time |
| 一起讓服務更好 | $9.99 | one-time |


## Frequently asked questions

### Is Formosanus free?

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

### Is Tamsui Go free?

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

### Do Formosanus or Tamsui Go have ads?

Neither Formosanus nor Tamsui Go shows ads.

### Which is updated more often, Formosanus or Tamsui Go?

Formosanus ships an update every 2 months, and Tamsui Go monthly. Most recently, Formosanus was updated on November 2, 2026 and Tamsui Go 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.*