SODUku vs Modstack
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
SODUku
Engage your mind with a classic Sudoku puzzle game offering thousands of challenges across four difficulty levels. Enjoy a relaxing, ad-supported experience with helpful hints and no time limits. Track your progress and customize your gameplay with different themes and sound options.
- Thousands of Sudoku puzzles
- Four difficulty levels
- Daily new puzzles
- Free hints
- No time limit
- Offline play
- Progress tracking
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Soduku2 is classic sudoku for beginners and advanced players. There are thousands of sudoku puzzles to explore and train your brain, and have fun! Easy play but hard to master. 100% FREE! DOWNLOAD NOW and start having fun! FEATURES • 4 difficulty levels : Easy, Medium, Hard and Expert. Adding unlimited levels in the feature • Daily sudoku, new sudoku game everyday. • Free hints at the first game • No time limit, so you can take your time and relax • Super smooth user interaction! • Fun sound effects • No wifi required, playable offline HOW TO PLAY • Take notes to keep track of possible numbers. • Highlight duplicates to help you solve the puzzle • Made a mistake? Using the eraser feature • Hints are available if you get stuck! • View Statistics and track your progress • Two color themes. • Simple design and sophisticated graphics • Sounds can be disabled if you want a quiet game NOTE: • This app contains litle ads. • Total free, no any items, packages, or levels for purchase Try to enjoy the game using different devices.
Modstack
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Modstack is a tactile programming puzzle about making big moves with a small set of commands. Place Move and Turn tiles into a program, stack modifiers to change what they do, then run your machine. Watch the robot execute each step, learn from the result, and compress your solution until it reaches par. WHAT YOU GET - 36 handcrafted campaign circuits across six chapters - A gentle visual introduction to programs, repetition, and mirroring - Ordered relays, switches, gates, and precision Expert Circuits - A new Easy, Medium, and Hard Daily Circuit every day - Layered hints that nudge without giving away the whole solution - Offline play with progress stored on your device - Purpose-built sound and haptic feedback - No ads, no account, and no tracking The Foundations chapter and Easy Daily are free. A single Full Game Unlock opens the remaining 30 campaign circuits plus Medium and Hard Daily. There is no subscription.
Screenshots
Verdict
The clearest difference is in-app purchases: SODUku at none against Modstack's 1. Modstack's advantage is ads (none vs shown) and update cadence (every 8 days vs every 5 weeks). 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
Both are free to download. Modstack sells 1 one-off in-app purchase. SODUku asks for nothing beyond the download.
SODUku ships an update every 5 weeks, Modstack every 8 days. The most recent releases landed on October 15, 2026 and October 10, 2026 respectively.
| Parameter | SODUku | Modstack |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 5 weeks | Every 8 days — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 53 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Nguyen Thanh Nam | NovoBuild LLC |
In-app purchases
SODUku
No in-app purchases
Modstack
- Unlock Full Modstack$3.99









