Read19 vs Gemdoku
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Read19
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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/
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.
- 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
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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
Verdict
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
Both are free to download. Read19 sells 4 in-app purchases, starting at $6.99 per month. Gemdoku asks for nothing beyond the download.
Read19 ships an update every 2 days, Gemdoku daily. The most recent releases landed on September 30, 2026 and October 3, 2026 respectively.
| Parameter | Read19 | Gemdoku |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 days | Daily — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad, Mac — better | iPhone, iPod |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 16 MB | 129 MB |
| Age rating | 4+ | 4+ |
| Developer | 思程 陈 | Lunar Apps |
In-app purchases
Read19
- KataGo Review Plus$6.991 Month
- 300K Visits$1.99
- 1M Visits$3.99
- 3M Visits$9.99
Gemdoku
No in-app purchases









