# Tacit OA vs 叭叭

The clearest difference is in-app purchases: Tacit OA at none against 叭叭's 1. Tacit OA also leads on iOS requirement (11.0 vs 13.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 叭叭 sells 1 one-off in-app purchase. Tacit OA asks for nothing beyond the download.

Tacit OA ships an update every 3 weeks, 叭叭 fortnightly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Tacit OA | 叭叭 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Size | 154 MB | 114 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jiu Tian Yun Technology (wuhan) Limited Company](https://appshunter.io/developer/1554438567) | [平顶山流觞科技有限公司](https://appshunter.io/developer/1808835656) |

## What reviewers say

### Tacit OA

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

**Features:** macOS Compatibility

**In-app purchases:** none


### 叭叭

[App page](https://appshunter.io/ios/app/id6463776308)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Open an account | $0.99 | one-time |


## Frequently asked questions

### Is Tacit OA free?

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

### Is 叭叭 free?

叭叭 is free to download, with in-app purchases available.

### Do Tacit OA or 叭叭 have ads?

Neither Tacit OA nor 叭叭 shows ads.

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

Tacit OA ships an update every 3 weeks, and 叭叭 fortnightly. Most recently, Tacit OA was updated on October 25, 2026 and 叭叭 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.*