# 天國之歌 vs KeysClass2

天國之歌 and KeysClass2 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

天國之歌 ships an update every 10 months, KeysClass2 every 9 months. The most recent releases landed on September 8, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 天國之歌 | KeysClass2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/id1046778608/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 9 months** |
| Size | 24 MB | 4 MB |
| Requires iOS | **12.0** | 13.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bruce Tseng](https://appshunter.io/developer/1046778607) | [YiLin Wen](https://appshunter.io/developer/1110629566) |

## What reviewers say

### 天國之歌

[App page](https://appshunter.io/ios/app/id1046778608)

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

**In-app purchases:** none


### KeysClass2

[App page](https://appshunter.io/ios/app/keysclass2/id1486556540)

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

**In-app purchases:** none


## Frequently asked questions

### Is 天國之歌 free?

天國之歌 is free to download, with no in-app purchases.

### Is KeysClass2 free?

KeysClass2 is free to download, with no in-app purchases.

### Do 天國之歌 or KeysClass2 have ads?

Neither 天國之歌 nor KeysClass2 shows ads.

### Which is updated more often, 天國之歌 or KeysClass2?

天國之歌 ships an update every 10 months, and KeysClass2 every 9 months. Most recently, 天國之歌 was updated on September 8, 2026 and KeysClass2 on September 9, 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.*