15 vs Decode the Code
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
15
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“15-puzzle” is a classic and funny game. It may be also called “Gem Puzzle”, “Boss Puzzle”, “Game of Fifteen”, “Mystic Square”… It is a sliding puzzle which you need to move all the tiles/cards back to their original positions. You can play by yourself, or compete with your friends. The features of this APP: ◎ Support single player mode and two players mode. ◎ Can select cards number ◎ Provide the statistics of your records ◎ Game Center supported
Decode the Code
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.
- Code-breaking gameplay
- Unlockable content packs
- Hard Mode challenges
- Stats tracking
- Friend comparisons
- Limited-time packs
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Based off of the Mastermind board game, Decode the Code is a new take on the classic puzzle game. In ten chances or less, try to crack the hidden code. Play more to get coins and unlock new packs to use during the game. Play Hard Mode for an extra challenge and win more coins. Keep track of your stats and compare them with friends. Buy special limited time packs that are always changing.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | 15 | Decode the Code |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.7 (13 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 13 — better |
| Update frequency | Every 14 months | Every 6 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 8.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 46 MB | 121 MB |
| Age rating | 4+ | 4+ |
| Developer | Chuanming Chang | Square Lion LLC |
In-app purchases
15
No in-app purchases
Decode the Code
- 10 Coins$0.99
- Remove Ads$0.99
- Special Pack$0.99
Show 2 moreShow fewer
- 55 Coins$4.99
- 120 Coins$9.99
