# STutor vs CountJack

The clearest difference is price: CountJack at Free against STutor's $0.99. CountJack also leads on update cadence (every 2 days vs every 28 months). STutor's advantage is in-app purchases (none vs 5) and ads (none vs shown). On device support there is nothing between them.

CountJack is free to download; STutor costs $0.99 up front. CountJack sells 5 one-off in-app purchases. STutor asks for nothing beyond the download.

STutor ships an update every 28 months, CountJack every 2 days. The most recent releases landed on September 21, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | STutor | CountJack |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stutor/id714298825/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 28 months | **Every 2 days** |
| Monetization | Paid | — |
| Size | 2 MB | 64 MB |
| Requires iOS | **13.0** | 16.1 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Robert Carlson](https://appshunter.io/developer/714298828) | [Andrey Seleznev](https://appshunter.io/developer/1665252540) |

## What reviewers say

### STutor

[App page](https://appshunter.io/ios/app/stutor/id714298825)

This app assists in solving Sudoku puzzles by offering three levels of hints and employing five logical solving strategies. It allows manual puzzle entry or input via an 81-character string, with options to save, recall, and manage puzzles. The app validates entries against its solution and displays possible numbers for incorrect moves.

**Highlights:** Three levels of hints, Five logical solving strategies, Manual puzzle entry, 81-character string input, Puzzle saving and management, Entry validation against solution, Display of possible numbers

**In-app purchases:** none


### CountJack

[App page](https://appshunter.io/ios/app/countjack/id6462346330)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 coin | $0.99 | one-time |
| 5 coins | $1.99 | one-time |
| 20 coins | $2.99 | one-time |
| 50 coins | $3.99 | one-time |
| 100 coins | $4.99 | one-time |


## Frequently asked questions

### Is STutor free?

STutor costs $0.99, with no in-app purchases.

### Is CountJack free?

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

### Do STutor or CountJack have ads?

CountJack shows ads; STutor does not.

### Which is updated more often, STutor or CountJack?

STutor ships an update every 28 months, and CountJack every 2 days. Most recently, STutor was updated on September 21, 2026 and CountJack on May 16, 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.*