# 15 vs Decode the Code

The clearest difference is in-app purchases: 15 at none against Decode the Code's 5. 15 also leads on iOS requirement (8.0 vs 11.0). Decode the Code's advantage is update cadence (every 6 weeks vs every 14 months). On price, ads and device support there is nothing between them.

Both are free to download. Decode the Code sells 5 one-off in-app purchases. 15 asks for nothing beyond the download.

15 ships an update every 14 months, Decode the Code every 6 weeks. The most recent releases landed on September 9, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | 15 | Decode the Code |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (13 ratings)](https://appshunter.io/ios/app/decode-the-code/id1421984663/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 14 months | **Every 6 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 46 MB | 121 MB |
| Requires iOS | **8.0** | 11.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chuanming Chang](https://appshunter.io/developer/1001571025) | [Square Lion LLC](https://appshunter.io/developer/1222755999) |

## What reviewers say

### 15

[App page](https://appshunter.io/ios/app/15-puzzle-classic/id1105760140)

**Features:** macOS Compatibility

**In-app purchases:** none


### Decode the Code

[App page](https://appshunter.io/ios/app/decode-the-code/id1421984663)

A puzzle game inspired by a classic board game where players guess a hidden code in limited attempts. Earn in-game currency to unlock new content and challenge yourself with harder modes. Track your progress and compare it with friends.

**Highlights:** Code-breaking gameplay, Unlockable content packs, Hard Mode challenges, Stats tracking, Friend comparisons, Limited-time packs

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 Coins | $0.99 | one-time |
| Remove Ads | $0.99 | one-time |
| Special Pack | $0.99 | one-time |
| 55 Coins | $4.99 | one-time |
| 120 Coins | $9.99 | one-time |


## Frequently asked questions

### Is 15 free?

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

### Is Decode the Code free?

Decode the Code is free to download, with in-app purchases available.

### Do 15 or Decode the Code have ads?

Both 15 and Decode the Code show ads.

### Which is updated more often, 15 or Decode the Code?

15 ships an update every 14 months, and Decode the Code every 6 weeks. Most recently, 15 was updated on September 9, 2026 and Decode the Code on June 1, 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.*