# 知半 vs BlackTom

The clearest difference is update cadence: 知半 at monthly against BlackTom's every 2 months. BlackTom's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

知半 ships an update monthly, BlackTom every 2 months. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 知半 | BlackTom |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Size | 100 MB | 75 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Beijing InDeep Network Technology Co., Ltd](https://appshunter.io/developer/1701401534) | [Tom AI LLC](https://appshunter.io/developer/1829925758) |

## What reviewers say

### 知半

[App page](https://appshunter.io/ios/app/id6748591708)

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

**In-app purchases:** none


### BlackTom

[App page](https://appshunter.io/ios/app/blacktom/id6749303287)

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

**In-app purchases:** none


## Frequently asked questions

### Is 知半 free?

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

### Is BlackTom free?

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

### Do 知半 or BlackTom have ads?

Neither 知半 nor BlackTom shows ads.

### Which is updated more often, 知半 or BlackTom?

知半 ships an update monthly, and BlackTom every 2 months. Most recently, 知半 was updated on October 25, 2026 and BlackTom on October 30, 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.*