Undersea Mahjong vs DeckKeeper
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Undersea Mahjong
A classic matching puzzle game where you clear the board by pairing identical tiles. Explore various themes and unlock new game modes to keep the challenge fresh. Compete with others through leaderboards and achievements.
- Classic Mahjong matching gameplay
- Multiple game modes including Memory
- Over 30 themed layouts
- Three difficulty levels
- Multi-language support
- Leaderboards and achievements
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*** UNDERSEA MAHJONG *** Mahjong Game! Mahjong is a classic matching puzzle game. Clear the board by matching all identical and free tiles. Game Features: -Different Game Modes: Undersea Mahjong is not only a Mahjong Game! A bunch of new game modes will be unlocked gradually. Let's start with Undersea Memory and stay tuned for the others! You'll never get bored! -30+ Different Layouts: be ready to travel among the seven wonders, freezing winters and dozen of classical themes. Do not miss the new layouts that will be released! -3 Degree of difficulties to better fit your skills. -Multi Language System: English, Italian, French, Spanish, Portuguese, German, Dutch. -Leader Boards, Achievements, and Social Features.
DeckKeeper
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With DeckKeeper, you can create and customize your own decks of cards by specifying their names and descriptions. When using a deck, the application automatically shuffles the cards and displays them sequentially on the screen of your device. You can simply tap the screen to move to the next card and DeckKeeper will announce its name. This app provides the ultimate gaming experience. You no longer have to waste time shuffling cards or choosing the next card - DeckKeeper does it all automatically, allowing you to focus on the game itself.
Screenshots
Verdict
The clearest difference is update cadence: DeckKeeper at every 3 weeks against Undersea Mahjong's every 3 months. Undersea Mahjong's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases 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. Undersea Mahjong sells 6 one-off in-app purchases and DeckKeeper sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Undersea Mahjong ships an update every 3 months, DeckKeeper every 3 weeks. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.
| Parameter | Undersea Mahjong | DeckKeeper |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3 ratings) — better | — |
| Positive reviews | 42.9% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 66 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Code This Lab srl | Pavel Yashin |
In-app purchases
Undersea Mahjong
- New 7 Wonders Layout$0.99
- Disable Ads$0.99
- Six New Layouts$0.99
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- New Six Winter Layout$0.99
- Coins Pack$1.99
- 100 coins, disable Ads, your name in the credits!$2.99
DeckKeeper
- Remove limits$2.99
- Remove Ads$4.99
Questions
Is Undersea Mahjong free?
Is DeckKeeper free?
Do Undersea Mahjong or DeckKeeper have ads?
Which is updated more often, Undersea Mahjong or DeckKeeper?
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