# Tacit OA vs 硕成OA

The clearest difference is iOS requirement: Tacit OA at 11.0 against 硕成OA's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Tacit OA ships an update every 3 weeks, 硕成OA every 2 weeks. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Tacit OA | 硕成OA |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 154 MB | 31 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jiu Tian Yun Technology (wuhan) Limited Company](https://appshunter.io/developer/1554438567) | [Century Sailing Education Technology Group Co., Ltd.](https://appshunter.io/developer/1476513230) |

## What reviewers say

### Tacit OA

[App page](https://appshunter.io/ios/app/tacit-oa/id1554438565)

**Features:** macOS Compatibility

**In-app purchases:** none


### 硕成OA

[App page](https://appshunter.io/ios/app/oa/id1590976485)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tacit OA free?

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

### Is 硕成OA free?

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

### Do Tacit OA or 硕成OA have ads?

Neither Tacit OA nor 硕成OA shows ads.

### Which is updated more often, Tacit OA or 硕成OA?

Tacit OA ships an update every 3 weeks, and 硕成OA every 2 weeks. Most recently, Tacit OA was updated on October 10, 2026 and 硕成OA on October 24, 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.*