# Carl App Pro vs Checkst

The clearest difference is iOS requirement: Checkst at 13.0 against Carl App Pro's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Carl App Pro sells 13 one-off in-app purchases and Checkst sells 1 in-app purchase, starting at $3.99 per 6 months. Whichever you choose, the download price is not the number that matters.

Carl App Pro ships an update every 3 weeks, Checkst every 2 weeks. The most recent releases landed on October 16, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Carl App Pro | Checkst |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 19 MB | 80 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cake Venture Technologies, Inc.](https://appshunter.io/developer/1775035685) | [Magnus Ohle](https://appshunter.io/developer/1865451896) |

## What reviewers say

### Carl App Pro

[App page](https://appshunter.io/ios/app/carl-app-pro/id6752743059)

**Features:** macOS Compatibility

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Majorship: CAED | $1.99 | one-time |
| Majorship: BEED | $1.99 | one-time |
| Majorship: TLETVTED | $1.99 | one-time |
| Majorship: English | $1.99 | one-time |
| Majorship: Filipino | $1.99 | one-time |
| Majorship: Math | $1.99 | one-time |
| Majorship: Values Ed | $1.99 | one-time |
| Majorship: Science | $1.99 | one-time |
| Majorship: Social Science | $1.99 | one-time |
| Quiz(10)+Mock(150) Subject | $1.99 | one-time |
| Carl AI + Download | $1.99 | one-time |
| Majorship Subject (One-Time) | $1.99 | one-time |
| Gen Ed + Prof Ed (Bundle) | $2.99 | one-time |


### Checkst

[App page](https://appshunter.io/ios/app/checkst-study-flashcards/id6757228282)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Checkst Cloud Sync & Group Upload | $3.99 | per 6 months |


## Frequently asked questions

### Is Carl App Pro free?

Carl App Pro is free to download, with in-app purchases available.

### Is Checkst free?

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

### Do Carl App Pro or Checkst have ads?

Neither Carl App Pro nor Checkst shows ads.

### Which is updated more often, Carl App Pro or Checkst?

Carl App Pro ships an update every 3 weeks, and Checkst every 2 weeks. Most recently, Carl App Pro was updated on October 16, 2026 and Checkst on October 20, 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.*