# AI分身术 vs Roll Call · Teacher Assistant

The clearest difference is in-app purchases: AI分身术 at none against Roll Call · Teacher Assistant's 1. Roll Call · Teacher Assistant's advantage is update cadence (every 3 days vs every 2 months) and iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Roll Call · Teacher Assistant sells 1 one-off in-app purchase. AI分身术 asks for nothing beyond the download.

AI分身术 ships an update every 2 months, Roll Call · Teacher Assistant every 3 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | AI分身术 | Roll Call · Teacher Assistant |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Size | 101 MB | 23 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [锦春 陈](https://appshunter.io/developer/1829977202) | [申生 金](https://appshunter.io/developer/1527691180) |

## What reviewers say

### AI分身术

[App page](https://appshunter.io/ios/app/ai/id6749346562)

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

**In-app purchases:** none


### Roll Call · Teacher Assistant

[App page](https://appshunter.io/ios/app/roll-call-teacher-assistant/id6759387869)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 永久解锁 | $9.99 | one-time |


## Frequently asked questions

### Is AI分身术 free?

AI分身术 is free to download, with no in-app purchases.

### Is Roll Call · Teacher Assistant free?

Roll Call · Teacher Assistant is free to download, with in-app purchases available.

### Do AI分身术 or Roll Call · Teacher Assistant have ads?

Neither AI分身术 nor Roll Call · Teacher Assistant shows ads.

### Which is updated more often, AI分身术 or Roll Call · Teacher Assistant?

AI分身术 ships an update every 2 months, and Roll Call · Teacher Assistant every 3 days. Most recently, AI分身术 was updated on October 30, 2026 and Roll Call · Teacher Assistant on November 5, 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.*