Comparison

Mahjong Sort vs Deck 21

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Mahjong Sort

Features
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Do you want to relax and unwind? Let's play Mahjong Sorting! This is a novel casual puzzle game that allows players to fully relax their body and brain How to Play Mahjong Sorting Click on Mahjong to move the same tiles to the same container. Only identical Mahjong tiles can be moved. Don't underestimate it Let's give it a try!

About

Deck 21

Features
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"Deck 21" is a strategic reimagining of the classic blackjack, featuring a new mechanic that transforms each round into a dynamic challenge. In addition to the traditional rules of trying to reach 21 points without going over, cards have special abilities that can increase or decrease their value, changing the course of the game at any time. This mechanic adds a layer of strategy and unpredictability, making every decision crucial. Players will need to think beyond the basics, considering not only the cards they have, but also the effects they can activate to influence the outcome. With intuitive and dynamic gameplay, "Deck 21" promises an immersive experience for those looking for an innovative and challenging card game. In addition to the single-player mode, "Deck 21" features competitive multiplayer, allowing players to challenge their friends in strategic matches and compete to see who can master the card variations and emerge victorious. With intuitive and dynamic gameplay, "Deck 21" promises an immersive experience for those looking for an innovative and challenging card game.

Screenshots

Mahjong Sort4 screens
Deck 213 screens

Verdict

The call

The clearest difference is ads: Deck 21 at none against Mahjong Sort's shown. Deck 21 also leads on update cadence (daily vs every 3 days). On price, in-app purchases, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Mahjong Sort ships an update every 3 days, Deck 21 daily. The most recent releases landed on September 14, 2026 and September 9, 2026 respectively.

Scorecard2 real differences · 4 level
Mahjong Sort versus Deck 21: the parameters behind the verdict, then further details
ParameterMahjong SortDeck 21
PriceFreeFree
Update frequencyEvery 3 daysDaily — better
AdsYesNo — better
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size18 MB74 MB
Age rating4+4+
Developer玉娥 李Andre Salvador

In-app purchases

None

Mahjong Sort

No in-app purchases

None

Deck 21

No in-app purchases

Questions

Is Mahjong Sort free?
Mahjong Sort is free to download, with no in-app purchases.
Is Deck 21 free?
Deck 21 is free to download, with no in-app purchases.
Do Mahjong Sort or Deck 21 have ads?
Mahjong Sort shows ads; Deck 21 does not.
Which is updated more often, Mahjong Sort or Deck 21?
Mahjong Sort ships an update every 3 days, and Deck 21 daily. Most recently, Mahjong Sort was updated on September 14, 2026 and Deck 21 on September 9, 2026.

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