# Clear Sudoku 9 vs SYSCALL

The clearest difference is review sentiment: Clear Sudoku 9 at 67% against SYSCALL's 0%. Clear Sudoku 9 also leads on rating (5.0 vs 4.0). SYSCALL's advantage is price (Free vs $1.99). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

SYSCALL is free to download; Clear Sudoku 9 costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Clear Sudoku 9 holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 67% of Clear Sudoku 9's written reviews are positive against 0% of SYSCALL's.

Clear Sudoku 9 ships an update every 9 days, SYSCALL every 11 days. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Clear Sudoku 9 | SYSCALL |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/clear-sudoku-9/id6759276385/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/syscall-mobile/id6781701372/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | **66.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 11 days |
| Monetization | Paid | Paid |
| Size | 2 MB | 18 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Theano Bertsia](https://appshunter.io/developer/1877475650) | [Chilling Moose](https://appshunter.io/developer/1595484986) |

## What reviewers say

### Clear Sudoku 9

[App page](https://appshunter.io/ios/app/clear-sudoku-9/id6759276385)

This Sudoku app prioritizes clarity with large, bold numbers and a clean interface. Enjoy a comfortable puzzle experience with intuitive controls, adjustable difficulty, and daily challenges. Play offline without ads or accounts.

**Highlights:** Large, bold numbers, Clean, uncluttered board, Simple, intuitive controls, Adjustable difficulty levels, Daily challenges, Progress tracking, Offline play

**Features:** macOS Compatibility

**In-app purchases:** none


### SYSCALL

[App page](https://appshunter.io/ios/app/syscall-mobile/id6781701372)

Engage in a unique reverse-engineering and assembly optimization puzzle game set within a 1990s warez BBS. Write and debug assembly programs to crack software, patch code, and navigate a virtual network. Explore a private board with tools and community features.

**Highlights:** Reverse-engineering assembly puzzles, Code tracing and patching, Network hacking challenges, Virtual BBS environment, Assembly pixel art tool, Chip-tune maker

**Features:** Game Controller support

**In-app purchases:** none


## Frequently asked questions

### Is Clear Sudoku 9 free?

Clear Sudoku 9 costs $1.99, with no in-app purchases.

### Is SYSCALL free?

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

### Which has better reviews, Clear Sudoku 9 or SYSCALL?

Clear Sudoku 9 is rated higher. Clear Sudoku 9 averages 5.0 out of 5 from 2 ratings, while SYSCALL averages 4.0 from 1 ratings.

### Do Clear Sudoku 9 or SYSCALL have ads?

Neither Clear Sudoku 9 nor SYSCALL shows ads.

### Which is updated more often, Clear Sudoku 9 or SYSCALL?

Clear Sudoku 9 ships an update every 9 days, and SYSCALL every 11 days. Most recently, Clear Sudoku 9 was updated on October 24, 2026 and SYSCALL on October 26, 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.*