0h h1 vs Puzzle IO
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
0h h1
This logic puzzle game challenges you to fill a grid with red and blue tiles based on three simple rules. It offers unlimited puzzles across four grid sizes, providing a brain-teasing experience without ads or in-app purchases.
- Tile-based logic puzzles
- Three simple rules
- Unlimited puzzles
- Four grid sizes (4x4 to 10x10)
- Tap to change tile color
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0h h1 is a little logic game that follows three simple rules: - Three red tiles or three blue tiles next to each other in a row or column isn't allowed - A full row or column must have as many blue tiles as it has red ones. - No two rows are the same. No two columns either. Simply tap a tile to make it red or blue and complete the grid. 0h h1 gives you unlimited puzzles for all four grid sizes: 4 x 4 6 x 6 8 x 8 10 x 10 0h h1 is free, without ads, without social network requirements, without locked features and without nag screens. 0h h1 is a little gift to you. We hope you enjoy it. 0h h1 can also be played on 0hh1.com.
Puzzle IO
Experience a modern, fast-paced logic puzzle game based on binary Sudoku. Fill grids with 0s and 1s following specific rules, earn bonuses with a smart point system, and compete globally. Offers endless challenges across six difficulty levels.
- Fill 10x10 grids with 0s and 1s
- Equal 0s and 1s per row/column
- No three identical numbers in a row
- Smart point system with bonuses
- Time-based multipliers for higher scores
- Game Center support and global leaderboards
- Six difficulty levels
- Unlimited unique puzzles
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Addictive Logic Fun! Looking for a fresh take on Sudoku? Puzzle IO brings you a modern, fast-paced, and highly addictive logic puzzle experience! Easy to learn, hard to master! * Fill each 10x10 grid with 0s and 1s * Each row and column must have an equal number of 0s and 1s * No three identical numbers in a row! Think fast, score big! * Smart point system: Earn bonuses by solving grids efficiently! * Time-based multipliers: Solve puzzles quickly for higher scores! * Game Center support: Compete with friends and climb the global leaderboards! Endless Challenges! * Six difficulty levels: Unlock harder modes as you improve! * Unlimited unique puzzles: No two grids are the same! * Clean, modern design: Smooth animations & intuitive controls! Ready to train your brain? Download Puzzle IO - Binary Sudoku now and start playing!
Screenshots
Verdict
The clearest difference is ads: 0h h1 at none against Puzzle IO's shown. 0h h1 also leads on monetization model (free vs free with in-app purchases) and review sentiment (91% vs 74%). Puzzle IO's advantage is update cadence (every 3 weeks vs every 3 months). On price, rating, ratings volume and in-app purchases 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. 0h h1 sells 1 one-off in-app purchase and Puzzle IO sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.7 for 0h h1 against 4.6 for Puzzle IO. Both are backed by a comparable volume of ratings — 303 and 362 respectively. Written reviews are what separate them: 91% of 0h h1's written reviews are positive against 74% of Puzzle IO's.
0h h1 ships an update every 3 months, Puzzle IO every 3 weeks. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.
| Parameter | 0h h1 | Puzzle IO |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (303 ratings) — better | 4.6 (362 ratings) |
| Positive reviews | 90.7% of reviews — better | 74.3% of reviews |
| Number of ratings | 303 | 362 — better |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 3 MB | 107 MB |
| Age rating | 4+ | 4+ |
| Developer | Q42 | 99 Up Games |
Customer experience
0h h1
Puzzle IO
User reviews
0h h1
From 303 App Store ratingsWhat we love
- ✨ No ads or in-app purchases
- 🧠 Challenging yet simple gameplay
- 💡 Helpful hints provided
- 🧠 Great for focus and ADHD
- 👍 Long-term player satisfaction
Room to improve
- ⚠️ Clipboard access prompt
- 🐛 Progress sometimes lost on closing app
- 🐛 Leaderboard scores appear impossible (negative times)
- 🐛 Hints sometimes incorrect or unhelpful
- 🐛 Start game over option missing
Puzzle IO
From 362 App Store ratingsWhat we love
- 👍 Simple mechanics
- 👍 Easy to play one-handed
- 👍 Different difficulty modes
- 👍 Guess function if you're not sure of your options
- 👍 Fun and requires the right level of brain power while not being too difficult
Room to improve
- 🐛 Hint function is not very useful
- 🐛 'Watch video' for hints doesn't work on the paid ad-free version
- 🔋 High battery consumption
- 💸 Too many ads and long ad breaks
- 🐛 Incorrect error detection on completed rows/columns
Bugs and requests
0h h1
Reported bugs
6 issues- Progress forfeited when closing app
- Randomly asks permission to paste from clipboard
- Leaderboard scores with negative times
- Hints sometimes incorrect or unhelpful
- Error display not reliable after update
Show 1 moreShow fewer
- Occasional crashes (implied by 'buggy')
Requested features
13 requests- Continue game progress after closing app
- In-game stats (games played, best times, scores)
- Option to start game over
- Option to highlight and erase incorrect cells
- Customizable color palettes
Show 8 moreShow fewer
- iCloud syncing of scores
- More difficulty settings or games
- Timed version for scoring
- Holiday themes
- Sound effects for clicks
- Background soundtrack
- Bigger maps/grids (e.g., 12x12)
- Integration with Game Center
Puzzle IO
Reported bugs
4 issues- Incorrect error detection on completed rows/columns
- Frequent crashes and bugs
- Game sometimes freezes or becomes unresponsive
- Ads not loading properly, preventing gameplay
Requested features
5 requests- Dark mode option
- Better hint system that explains the logic
- Option to turn off row/column completion notifications
- More challenging puzzle levels
- Ability to create and save custom puzzles
In-app purchases
0h h1
- 0h h1 Supporter$0.99
Puzzle IO
- Remove Ads$2.99
