Comparison

JongKey vs MJ DB

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

Head to head
About

JongKey

Features
Read full description

JongKey is a custom keyboard app that makes it easy to input mahjong tiles. Perfect for recording mahjong games, "What to discard?" discussions, and sharing on social media - making mahjong communication more enjoyable and convenient! 【Key Features】 • Easy input for all 34 types of mahjong tiles and tile backs • Supports two output formats: Unicode emoji and MPS notation • Quick input with intuitive tap operations • Supports Japanese, English, and Chinese (Simplified & Traditional) 【How to Use】 1. Add "JongKey" to keyboards in Settings app 2. Switch keyboards by tapping the globe icon in messaging apps 3. Tap mahjong tiles to input 【Output Formats】 • Unicode: Mahjong tile characters (displayed as emoji) • MPS notation: E S W N, 1m 2m 3m etc. (displayed as text) ※Full Access not required. Your input is not transmitted externally.

About

MJ DB

Features
Read full description

## Game Records - Record scores for each round: Real-time game trend charts - Detailed statistical analysis: Displays historical win rates and fan point distribution trends - Supports modifying/deleting past records, no fear of marking mistakes - Local Connection: Real-time sharing to other local devices, everyone can see - Displays modification and deletion logs for fairness and transparency ## Quick Start - Free, no intrusive ads - Completely offline, simple and easy to use - One-click to join previous players - Record scores with drag and drop of players - Handy tools: Seat shuffling, dice rolling, final settlement (supports grouping two people together for split payments) - Preset and customizable fan point tables, supports Jackpot gameplay ## UIUX - Traditional Chinese and English interface - Supports Dark Mode - Supports iPhone and iPad

Screenshots

JongKey1 screens
MJ DB4 screens

Verdict

The call

The clearest difference is in-app purchases: JongKey at none against MJ DB's 1. JongKey also leads on update cadence (daily vs every 2 days). MJ DB's advantage is ads (none vs shown). On price, 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. MJ DB sells 1 one-off in-app purchase. JongKey asks for nothing beyond the download.

UpkeepUpdate frequency

JongKey ships an update daily, MJ DB every 2 days. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 3 level
JongKey versus MJ DB: the parameters behind the verdict, then further details
ParameterJongKeyMJ DB
PriceFreeFree
Update frequencyDaily — betterEvery 2 days
AdsYesNo — better
In-app purchasesNo — betterYes
DevicesiPhoneiPhone, iPad — better
Requires iOS17.6 — better18.0
Further details — not scored
Size6 MB28 MB
Age rating4+4+
DeveloperYuki Takedawilson chung

In-app purchases

None

JongKey

No in-app purchases

1 purchases

MJ DB

One-time1
  • Remove Ads$0.99

Questions

Is JongKey free?
JongKey is free to download, with no in-app purchases.
Is MJ DB free?
MJ DB is free to download, with in-app purchases available.
Do JongKey or MJ DB have ads?
JongKey shows ads; MJ DB does not.
Which is updated more often, JongKey or MJ DB?
JongKey ships an update daily, and MJ DB every 2 days. Most recently, JongKey was updated on October 11, 2026 and MJ DB on October 7, 2026.

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