# OSS vs 書いて解く簿記

The clearest difference is price: 書いて解く簿記 at Free against OSS's $3.99. 書いて解く簿記 also leads on update cadence (every 4 days vs every 15 months). OSS's advantage is in-app purchases (none vs 5) and iOS requirement (15.1 vs 17.0). On ads and device support there is nothing between them.

書いて解く簿記 is free to download; OSS costs $3.99 up front. 書いて解く簿記 sells 5 one-off in-app purchases. OSS asks for nothing beyond the download.

OSS ships an update every 15 months, 書いて解く簿記 every 4 days. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | OSS | 書いて解く簿記 |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 4 days** |
| Size | 44 MB | 6 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Daisuke Matsubara](https://appshunter.io/developer/1720755722) | [KEISUKE MASUDA](https://appshunter.io/developer/6799662296) |

## What reviewers say

### OSS

[App page](https://appshunter.io/ios/app/oss-db-silver/id6745166641)

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

**In-app purchases:** none


### 書いて解く簿記

[App page](https://appshunter.io/ios/app/id6808084413)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3級 全問題解放 | $4.99 | one-time |
| 2級 全問題解放 | $5.99 | one-time |
| 1級 全問題解放 | $8.99 | one-time |
| 3級・2級 全問題解放 | $9.99 | one-time |
| 2級・1級 全問題解放 | $11.99 | one-time |


## Frequently asked questions

### Is OSS free?

OSS costs $3.99, with no in-app purchases.

### Is 書いて解く簿記 free?

書いて解く簿記 is free to download, with in-app purchases available.

### Do OSS or 書いて解く簿記 have ads?

Neither OSS nor 書いて解く簿記 shows ads.

### Which is updated more often, OSS or 書いて解く簿記?

OSS ships an update every 15 months, and 書いて解く簿記 every 4 days. Most recently, OSS was updated on October 7, 2026 and 書いて解く簿記 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.*