# SEIRAKU vs 天文宇宙検定1級 過去問・暗記アプリ

The clearest difference is in-app purchases: SEIRAKU at none against 天文宇宙検定1級 過去問・暗記アプリ's 3. SEIRAKU also leads on iOS requirement (15.0 vs 17.0). 天文宇宙検定1級 過去問・暗記アプリ's advantage is update cadence (fortnightly vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. 天文宇宙検定1級 過去問・暗記アプリ sells 3 one-off in-app purchases. SEIRAKU asks for nothing beyond the download.

SEIRAKU ships an update monthly, 天文宇宙検定1級 過去問・暗記アプリ fortnightly. Both last shipped on November 5, 2026.

## The numbers

| Metric | SEIRAKU | 天文宇宙検定1級 過去問・暗記アプリ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Fortnightly** |
| Size | 26 MB | 42 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Fuji Bit Inc.](https://appshunter.io/developer/1874205957) | [Hajime App Lab](https://appshunter.io/developer/1704838092) |

## What reviewers say

### SEIRAKU

[App page](https://appshunter.io/ios/app/seiraku-celestial-mechanics/id6760764034)

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

**In-app purchases:** none


### 天文宇宙検定1級 過去問・暗記アプリ

[App page](https://appshunter.io/ios/app/1/id6784950185)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告削除 | $3.99 | one-time |
| 全問題解放 | $3.99 | one-time |
| 広告削除+全問題解放 | $5.99 | one-time |


## Frequently asked questions

### Is SEIRAKU free?

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

### Is 天文宇宙検定1級 過去問・暗記アプリ free?

天文宇宙検定1級 過去問・暗記アプリ is free to download, with in-app purchases available.

### Do SEIRAKU or 天文宇宙検定1級 過去問・暗記アプリ have ads?

Both SEIRAKU and 天文宇宙検定1級 過去問・暗記アプリ show ads.

### Which is updated more often, SEIRAKU or 天文宇宙検定1級 過去問・暗記アプリ?

SEIRAKU ships an update monthly, and 天文宇宙検定1級 過去問・暗記アプリ fortnightly. Most recently, SEIRAKU was updated on November 5, 2026 and 天文宇宙検定1級 過去問・暗記アプリ on November 5, 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.*