# Chatbot Open vs ARphymedes StudentBook

The clearest difference is in-app purchases: ARphymedes StudentBook at none against Chatbot Open's 2. ARphymedes StudentBook also leads on ads (none vs shown). Chatbot Open's advantage is update cadence (every 2 days vs every 6 weeks) and iOS requirement (12.0 vs 14.0). On price and device support there is nothing between them.

Both are free to download. Chatbot Open sells 2 in-app purchases, starting at $0.99 per 7 days. ARphymedes StudentBook asks for nothing beyond the download.

Chatbot Open ships an update every 2 days, ARphymedes StudentBook every 6 weeks. The most recent releases landed on September 23, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Chatbot Open | ARphymedes StudentBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 6 weeks |
| Size | 34 MB | 837 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [晓椰 刘](https://appshunter.io/developer/1649682955) | [DIADRASIS LADAS I. & CO O.E.](https://appshunter.io/developer/1163797391) |

## What reviewers say

### Chatbot Open

[App page](https://appshunter.io/ios/app/chatbot-openassistant-pro/id1671756566)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro for 1 Week | $0.99 | per 7 days |
| Pro for 1 Month | $2.99 | per month |


### ARphymedes StudentBook

[App page](https://appshunter.io/ios/app/arphymedes-studentbook/id6448527002)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chatbot Open free?

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

### Is ARphymedes StudentBook free?

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

### Do Chatbot Open or ARphymedes StudentBook have ads?

Chatbot Open shows ads; ARphymedes StudentBook does not.

### Which is updated more often, Chatbot Open or ARphymedes StudentBook?

Chatbot Open ships an update every 2 days, and ARphymedes StudentBook every 6 weeks. Most recently, Chatbot Open was updated on September 23, 2026 and ARphymedes StudentBook on September 14, 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.*