Comparison

Mahjong 4 Friends vs Mental Chronometry

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

Head to head
About

Mahjong 4 Friends

Play various styles of Mahjong against friends or AI. Offers detailed instructions and tutorials for learning rules and strategies. Supports multiple rule sets and scoring for official Mahjongg League cards.

Highlights
  • Play with friends or bots
  • Supports American, Chinese, Hong Kong, British Mahjong
  • In-game instructions and tutorials
  • Scoring for NMJL and Marvelous Mah Jongg cards
  • Customizable game rules
  • Multiplayer room creation
Features
Read full description

Play real American or Chinese Mahjong — free, anytime, with friends or AI players. Play on your own against AI players, invite friends for a full table, or mix both — Mahjong 4 Friends brings the full table experience online. You'll be playing and practicing mahjong in seconds. AMERICAN MAHJONG — JUST LIKE YOUR WEEKLY GAME Play with NMJL (National Mah Jongg League) 2026 and Marvelous cards, complete with Charleston rounds, jokers, and authentic scoring. Everything works exactly the way you expect. CHINESE, HONG KONG & BRITISH VARIANTS Switch styles anytime. Play 13-tile formats with pongs, kongs, chows, and pairs — all fully supported with proper rules. ALWAYS HAVE A GAME Play with friends or fill empty seats with AI players — no waiting for a full table. You can also join public tables to play others. GREAT FOR BEGINNERS AND REGULARS Built-in tips and suggestions help new players learn naturally, without slowing the game down for everyone else. PLAY ANYWHERE Enjoy smooth real-time multiplayer across devices with no complicated setup. Start playing in no time. FREE AND UNLIMITED No paywalls for continued play. No time limits. Play online with friends or offline with AI players, and customize your settings to play your way. Have feedback or want a new feature? We actually read our emails — reach us at support@mahjong4friends.com. We typically respond within 24 hours. Your Mahjong table is now always open. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Mental Chronometry

Features
Read full description

Stop the wheels at the right time to get the best score.

Screenshots

Mahjong 4 Friends4 screens
Mental Chronometry4 screens

Verdict

The call

The clearest difference is price: Mahjong 4 Friends at Free against Mental Chronometry's $0.99. Mahjong 4 Friends also leads on update cadence (monthly vs every 42 months) and chart position (#18 vs unranked). Mental Chronometry's advantage is in-app purchases (none vs 8) and ads (none vs shown). On 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

Mahjong 4 Friends is free to download; Mental Chronometry costs $0.99 up front. Mahjong 4 Friends sells 8 in-app purchases, starting at $0.99 per month. Mental Chronometry asks for nothing beyond the download.

UpkeepUpdate frequency

Mahjong 4 Friends ships an update monthly, Mental Chronometry every 42 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

Scorecard5 real differences · 6 level
Mahjong 4 Friends versus Mental Chronometry: the parameters behind the verdict, then further details
ParameterMahjong 4 FriendsMental Chronometry
PriceFree — better$0.99
Rating4.9 (26K ratings) — better—
Positive reviews75.4% of reviews—
Number of ratings26K — better—
Update frequencyMonthly — betterEvery 42 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#18 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size68 MB201 MB
Age rating12+4+
DeveloperUnwind Media, LLCPaul Cohen

Bugs and requests

Mahjong 4 Friends

Reported bugs

2 issues
  • App freezing or crashing after updates
  • Suggested hands feature not working with new card

Requested features

3 requests
  • Ability to play with real people online
  • Keeping score and progress tracking
  • Support for special hands in Chinese Mahjong

Mental Chronometry

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Mahjong 4 Friends

Subscriptions8
  • Mahjong 4 Friends Premium$0.991 Month
  • Mahjong 4 Friends Premium$2.991 Month
  • NMJL Pro$5.991 Year
Show 5 more
  • Marvelous Pro$5.991 Year
  • Chinese Pro$5.991 Year
  • Ad-Free$5.991 Year
  • Mahjong 4 Friends Premium$9.991 Year
  • Mahjong 4 Friends Premium$19.991 Year
None

Mental Chronometry

No in-app purchases

Questions

Is Mahjong 4 Friends free?
Mahjong 4 Friends is free to download, with in-app purchases available.
Is Mental Chronometry free?
Mental Chronometry costs $0.99, with no in-app purchases.
Do Mahjong 4 Friends or Mental Chronometry have ads?
Mahjong 4 Friends shows ads; Mental Chronometry does not.
Which is updated more often, Mahjong 4 Friends or Mental Chronometry?
Mahjong 4 Friends ships an update monthly, and Mental Chronometry every 42 months. Most recently, Mahjong 4 Friends was updated on October 29, 2026 and Mental Chronometry on October 25, 2026.

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