# Decodex vs SYSCALL

The clearest difference is price: Decodex at Free against SYSCALL's $7.99. Decodex also leads on rating (5.0 vs 4.0) and update cadence (every 2 days vs weekly). SYSCALL's advantage is in-app purchases (none vs 4). On ads and device support there is nothing between them.

Decodex is free to download; SYSCALL costs $7.99 up front. Decodex sells 4 one-off in-app purchases. SYSCALL asks for nothing beyond the download.

Decodex holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Decodex ships an update every 2 days, SYSCALL weekly. The most recent releases landed on August 13, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Decodex | SYSCALL |
| --- | --- | --- |
| Price | **Free** | $7.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/decodex-cryptogram-game/id6758961298/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/syscall-mobile/id6781701372/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 19 MB | 17 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aron Csatlos](https://appshunter.io/developer/1661657865) | [Chilling Moose](https://appshunter.io/developer/1595484986) |

## What reviewers say

### Decodex

[App page](https://appshunter.io/ios/app/decodex-cryptogram-game/id6758961298)

Engage in a modern take on classic cryptogram puzzles. Decipher quotes and enigma codes across diverse categories. Track your progress, build streaks, and enjoy a new challenge daily.

**Highlights:** 50+ puzzle categories, Daily enigma challenges, Intuitive user interface, Progress tracking and streaks, Substitution cipher gameplay

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extra Hints - Small Pack | $0.99 | one-time |
| Extra Hints - Big Pack | $1.99 | one-time |
| Decodex Premium | $2.99 | one-time |
| Extra Hints - Ultimate Pack | $4.99 | one-time |


### 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 Decodex free?

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

### Is SYSCALL free?

SYSCALL costs $7.99, with no in-app purchases.

### Which has better reviews, Decodex or SYSCALL?

Decodex is rated higher. Decodex averages 5.0 out of 5 from 3 ratings, while SYSCALL averages 4.0 from 1 ratings.

### Do Decodex or SYSCALL have ads?

Neither Decodex nor SYSCALL shows ads.

### Which is updated more often, Decodex or SYSCALL?

Decodex ships an update every 2 days, and SYSCALL weekly. Most recently, Decodex was updated on August 13, 2026 and SYSCALL on September 28, 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.*