Comparison

Read19 vs Gemdoku

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

Head to head
About

Read19

Features
Read full description

Read19 brings cloud-powered KataGo analysis to iPhone, iPad, and Mac. Play directly against AI and watch win rate and score lead update move by move. Import SGF records to explore candidate moves, principal variations, ownership, and whole-game trends. Read19 flags inaccuracies, mistakes, and blunders by win-rate and point loss, so you can focus on the moves that changed the game. Your games and reviews stay on device. Sign in to sync privately with iCloud across devices and export standard SGF files. Read19 prefers secure WSS and falls back to HTTPS on restricted networks. Advanced users can connect to a compatible backend with custom HTTPS/WSS endpoints and an optional Bearer token. Free includes 100,000 visits each calendar month with the Fast model. Plus unlocks the stronger Balanced model, more concurrency, and 2,000,000 monthly visits. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Gemdoku

A relaxing logic puzzle game where you place gems on a board, ensuring one per row, column, and color region without any touching. Offers daily challenges and leaderboards for a competitive yet calm experience.

Highlights
  • Pure deduction gameplay
  • Board sizes up to 10x10
  • In-game hints and tutorials
  • Daily challenges and leaderboards
  • Save progress mid-level
  • Customizable sound and haptics
Features
Read full description

Gemdoku is a calm, clever logic puzzle. Place exactly one gem in every row, every column and every colour region - and no two gems may touch, not even diagonally. Every level has a single solution you can reach by pure deduction: no guessing, ever. HOW IT PLAYS - Tap a tile to mark an X, swipe to mark several, double-tap to place a gem. - Boards grow from 4x4 to 10x10 as you progress, with a HARD level every 10 levels. - Hints explain the exact deduction, so you learn the techniques as you go. - Three lives per level. Lose them all and you can retry any time. EVERY DAY - A Daily Challenge shared by every player - see how many you beat. - A daily streak with a reward chest every 7 days. - A weekly leaderboard of real players. MADE FOR SHORT BREAKS - Levels save mid-way, so you can pick up where you left off. - Sound, voice and haptics you can turn off. - No account needed. Gemdoku is a fresh take on the Queens / Star Battle family of puzzles, built for one-handed play.

Screenshots

Read194 screens
Gemdoku4 screens

Verdict

The call

The clearest difference is in-app purchases: Gemdoku at none against Read19's 4. Gemdoku also leads on iOS requirement (15.0 vs 18.0). Read19's advantage is ads (none vs shown). On price, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Read19 sells 4 in-app purchases, starting at $6.99 per month. Gemdoku asks for nothing beyond the download.

UpkeepUpdate frequency

Read19 ships an update every 2 days, Gemdoku daily. The most recent releases landed on September 30, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 6 level
Read19 versus Gemdoku: the parameters behind the verdict, then further details
ParameterRead19Gemdoku
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 2 daysDaily — better
AdsNo — betterYes
In-app purchasesYesNo — better
Monetization—Ad-supported
DevicesiPhone, iPad, Mac — betteriPhone, iPod
Requires iOS18.015.0 — better
Further details — not scored
Size16 MB129 MB
Age rating4+4+
Developer思程 陈Lunar Apps

In-app purchases

4 purchases

Read19

Subscriptions1
  • KataGo Review Plus$6.991 Month
One-time3
  • 300K Visits$1.99
  • 1M Visits$3.99
  • 3M Visits$9.99
None

Gemdoku

No in-app purchases

Questions

Is Read19 free?
Read19 is free to download, with in-app purchases available.
Is Gemdoku free?
Gemdoku is free to download, with no in-app purchases.
Do Read19 or Gemdoku have ads?
Gemdoku shows ads; Read19 does not.
Which is updated more often, Read19 or Gemdoku?
Read19 ships an update every 2 days, and Gemdoku daily. Most recently, Read19 was updated on September 30, 2026 and Gemdoku on October 3, 2026.

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