Comparison

Gem Mining Robot vs Mahjong

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

Head to head
About

Gem Mining Robot

Features
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A casual game for a self-propelled robot that specializes in digging gems. It has enough power, and with a powerful laser launcher, it can evaporate clay and move almost unimpeded underground. It also has front and rear cannons that can destroy various monsters underground. But it must be able to fire after digging at least one gem. This robot is not omnipotent. It does not know where the gems are, nor where the monsters are. It needs your operation to complete the task. 1. The direction of advance: You need to indicate the direction of advance for it (by gently swipe to up, down, left or right) 2. When to fire: There are various monsters that can automatically track it, and as long as they touch it, the game will over. Therefore, it is best to shoot the monsters before they approach, and of course the score will be consumed. 3. Do nothing about the stone: it can only go around the stone and move forward. However, for the stone that has no obstacles in front or is at the edge of the tunnel, just push it lightly to break through the obstacles and continue to move forward. Because stones can kill all kinds of monsters, in order to save score, it is best to use stones to kill such monsters. Main operations: 1. Swipe: Slide your finger up, down, left, and right anywhere on the screen to change the direction 2. Tap: Tap the location around the robot to fire. Notes: Internet is must to play this game.

About

Mahjong

Engage in a relaxing Mahjong puzzle experience with a mysterious anime girl. Match identical tiles to clear the board, avoid blocked pieces, and aim for combos. Enjoy the calming atmosphere with rainy sounds and lo-fi music, playable on your smartwatch.

Highlights
  • Match 2 identical Mahjong pieces
  • Match any 2 pieces of the same set
  • Avoid blocked pieces
  • Create combos
  • Chill with rainy sounds and lo-fi music
  • Playable on smartwatch
Features
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Everynight, the same dream... The same girl in the rain, ask you to play Mahjong. What are the meaning of all those? So much to be curious about and there is only one way to find out: Solve the puzzle and see what the girl want. * Match 2 pieces of Mahjong with same symbol. * You can match any 2 Mahjong pieces of the same set. * You can not use a blocked piece. * Avoid mistake to make combo. * Chill in rainy sound and low fi music with zero pressure. * Also play on smartwatch. Get the game, help the mysterious girl!

Screenshots

Gem Mining Robot2 screens
Mahjong4 screens

Verdict

The call

The clearest difference is in-app purchases: Mahjong at none against Gem Mining Robot's 5. Mahjong also leads on update cadence (every 2 weeks vs every 5 weeks) and device support (4 vs 2). On price and ads 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. Gem Mining Robot sells 5 one-off in-app purchases. Mahjong asks for nothing beyond the download.

UpkeepUpdate frequency

Gem Mining Robot ships an update every 5 weeks, Mahjong every 2 weeks. The most recent releases landed on October 8, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Gem Mining Robot versus Mahjong: the parameters behind the verdict, then further details
ParameterGem Mining RobotMahjong
PriceFreeFree
Rating—4.7 (69 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—69 — better
Update frequencyEvery 5 weeksEvery 2 weeks — better
AdsYesYes
In-app purchasesYesNo — better
Monetization—Ad-supported
DevicesiPhone, MaciPhone, iPad, iPod, Apple Watch — better
Requires iOS17.615.3 — better
Further details — not scored
Size8 MB272 MB
Age rating4+4+
DeveloperAOBO Co.,LtdGosiha Pte. Ltd

In-app purchases

5 purchases

Gem Mining Robot

One-time5
  • Level 2$0.99
  • Level 3$0.99
  • Level 4$0.99
Show 2 more
  • Level 5$0.99
  • Level 6$0.99
None

Mahjong

No in-app purchases

Questions

Is Gem Mining Robot free?
Gem Mining Robot is free to download, with in-app purchases available.
Is Mahjong free?
Mahjong is free to download, with no in-app purchases.
Do Gem Mining Robot or Mahjong have ads?
Both Gem Mining Robot and Mahjong show ads.
Which is updated more often, Gem Mining Robot or Mahjong?
Gem Mining Robot ships an update every 5 weeks, and Mahjong every 2 weeks. Most recently, Gem Mining Robot was updated on October 8, 2026 and Mahjong on October 24, 2026.

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