# Sitor vs Ask Teacher (家长版)

The clearest difference is in-app purchases: Ask Teacher (家长版) at none against Sitor's 10. Ask Teacher (家长版) also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Sitor sells 10 in-app purchases, starting at $11.99 per month. Ask Teacher (家长版) asks for nothing beyond the download.

Sitor ships an update every 2 days, Ask Teacher (家长版) every 3 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | Sitor | Ask Teacher (家长版) |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 days |
| Size | 46 MB | 28 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hangzhou Sitor Cloud Technology Co., Ltd.](https://appshunter.io/developer/6772942927) | [Beijing Shenban Technology Co., Ltd.](https://appshunter.io/developer/1691332255) |

## What reviewers say

### Sitor

[App page](https://appshunter.io/ios/app/sitor/id6772958025)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Monthly | $11.99 | per month |
| Pro Monthly | $23.99 | per month |
| Starter Annual | $93.99 | per year |
| Pro Annual | $187.99 | per year |
| 50 Credits | $3.99 | one-time |
| 200 Credits | $12.99 | one-time |
| 500 Credits | $27.99 | one-time |
| 1000 Credits | $49.99 | one-time |
| 3000 Credits | $129.99 | one-time |
| 5000 Credits | $199.99 | one-time |


### Ask Teacher (家长版)

[App page](https://appshunter.io/ios/app/ask-teacher/id6780327702)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sitor free?

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

### Is Ask Teacher (家长版) free?

Ask Teacher (家长版) is free to download, with no in-app purchases.

### Do Sitor or Ask Teacher (家长版) have ads?

Neither Sitor nor Ask Teacher (家长版) shows ads.

### Which is updated more often, Sitor or Ask Teacher (家长版)?

Sitor ships an update every 2 days, and Ask Teacher (家长版) every 3 days. Most recently, Sitor was updated on October 28, 2026 and Ask Teacher (家长版) on October 28, 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.*