# CourseBot vs Calvin Chess Trainer

The clearest difference is update cadence: Calvin Chess Trainer at every 5 days against CourseBot's every 9 months. 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.

CourseBot ships an update every 9 months, Calvin Chess Trainer every 5 days. The most recent releases landed on August 31, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | CourseBot | Calvin Chess Trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 5 days** |
| Size | 5 MB | 215 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hengyu Zhou](https://appshunter.io/developer/788570080) | [DAVID MARKLE](https://appshunter.io/developer/1880745263) |

## What reviewers say

### CourseBot

[App page](https://appshunter.io/ios/app/coursebot/id1041756805)

**Features:** Vision Pro support

**In-app purchases:** none


### Calvin Chess Trainer

[App page](https://appshunter.io/ios/app/calvin-chess-trainer/id6759800929)

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

**In-app purchases:** none


## Frequently asked questions

### Is CourseBot free?

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

### Is Calvin Chess Trainer free?

Calvin Chess Trainer is free to download, with no in-app purchases.

### Do CourseBot or Calvin Chess Trainer have ads?

Neither CourseBot nor Calvin Chess Trainer shows ads.

### Which is updated more often, CourseBot or Calvin Chess Trainer?

CourseBot ships an update every 9 months, and Calvin Chess Trainer every 5 days. Most recently, CourseBot was updated on August 31, 2026 and Calvin Chess Trainer on September 15, 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.*