# OSS vs 簿記一級理論

The clearest difference is price: 簿記一級理論 at Free against OSS's $3.99. 簿記一級理論 also leads on update cadence (fortnightly vs every 15 months). OSS's advantage is iOS requirement (15.1 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

簿記一級理論 is free to download; OSS costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OSS ships an update every 15 months, 簿記一級理論 fortnightly. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | OSS | 簿記一級理論 |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Fortnightly** |
| Size | 44 MB | 2 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Daisuke Matsubara](https://appshunter.io/developer/1720755722) | [UKY DESIGN](https://appshunter.io/developer/1895240906) |

## 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


### 簿記一級理論

[App page](https://appshunter.io/ios/app/id6770537747)

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

**In-app purchases:** none


## Frequently asked questions

### Is OSS free?

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

### Is 簿記一級理論 free?

簿記一級理論 is free to download, with no in-app purchases.

### Do OSS or 簿記一級理論 have ads?

Neither OSS nor 簿記一級理論 shows ads.

### Which is updated more often, OSS or 簿記一級理論?

OSS ships an update every 15 months, and 簿記一級理論 fortnightly. Most recently, OSS was updated on October 7, 2026 and 簿記一級理論 on October 6, 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.*