# Tacit OA vs 哲达云

The clearest difference is device support: Tacit OA at 2 against 哲达云's —. On price, in-app purchases and iOS requirement there is nothing between them.

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

## The numbers

| Metric | Tacit OA | 哲达云 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 3 weeks | — |
| Size | 154 MB | 54 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 17+ |
| Developer | [Jiu Tian Yun Technology (wuhan) Limited Company](https://appshunter.io/developer/1554438567) | [HANGZHOU ZETA TECHNOLOGY Co., LTD](https://appshunter.io/developer/1454219187) |

## What reviewers say

### Tacit OA

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

**Features:** macOS Compatibility

**In-app purchases:** none


### 哲达云

[App page](https://appshunter.io/ios/app/id1619922245)

**In-app purchases:** none


## Frequently asked questions

### Is Tacit OA free?

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

### Is 哲达云 free?

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

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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.*