Not Evil Sudoku vs PixelTherapy
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Not Evil Sudoku
Enjoy a distraction-free Sudoku experience with helpful features like hints and real-time validation. Track your progress, compete globally, and customize the app with themes. Play daily puzzles for free or upgrade for unlimited games and advanced statistics.
- Fully offline play
- No ads or distractions
- Real-time move validation
- Shake for hints
- Daily puzzles with leaderboards
- Customizable themes and icons
- Notes and auto-clear notes
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A joyful sudoku-solving experience built natively for iPhone and iPad and optimized for a zen solving experience free from bloat and distraction. Designed to be easy to play and meet you where ever you are in your sudoku journey: a casual solver or a sudoku pro. Stuck on a puzzle? Shake your phone for hints and turn on move by move validation in settings to get immediate feedback on your solve. Tickle your brain as you learn new solving strategies and customize the app to your taste with themes and alternate app icons. Play a daily puzzle at a difficulty of your choice and see where you stack up with players across the globe. Or just turn off the stopwatch and relax. Key features: - Fully offline: no internet required - No ads or distractions - Real-time move validation to get immediate feedback - Shake for a hint on the next logical move - Leaderboards with assist tracking - Easy, Medium, and Hard difficulty levels - Light/Dark mode - Stopwatch and best time tracking - Notes: Keep track of candidates - Auto-clear Notes: removes candidate numbers automatically in row, column, and box when they become outdated - Speed demon: Lock numbers and place them in multiple tiles at once - Arithmophobia: Sudoku with letters instead of numbers - Daily streak tracking - Daily reminder notifications - Highlighter: tap a number to highlight all its instances on the board - Themes to customize the interface (some require Pro) - Alternate app icons (Pro) - Charts and statistics (Pro): track solve speed over time and puzzle count by difficulty Play the daily puzzle at your preferred difficulty for free without any limits on assists or game features. Upgrade to Pro with a one-time purchase to unlock unlimited games, detailed stats, more themes, and alternate app icons. Pro supports Family Sharing.
PixelTherapy
Engage in a relaxing color-by-number puzzle designed to reduce stress. Enjoy a peaceful experience with ambient music and no timers. Discover new themed collections and unlock bonus content through daily play and optional ads.
- Stress-free pixel coloring
- Soothing ambient music
- Themed art collections
- Auto-fill power-ups
- Daily streaks and rewards
- Weekly content updates
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Take a mindful break with Pixel Therapy, a relaxing color-by-number puzzle that melts away stress pixel by pixel. No intrusive ads, no timers—just soothing ambient music and the satisfying flow of pixel art coloring. Dive into six themed collections—Jurassic Art, Enchanted Realms, Dream Escapes, Food Marvels, Pattern Rise, and Martian Vistas—featuring hundreds of original illustrations hand-crafted by the developer. New collections arrive regularly to keep your creativity inspired. Key Features Stress-free coloring: Tap each pixel at your own pace—no rush, no pressure. Soothing soundscape: Chill ambient tracks enhance focus and recharge your mind. Smart ad experience: Minimal mini-banners plus optional rewarded ads for bonus popular artworks. Auto-fill power-ups: Rank up to unlock automatic coloring cells and extended “shake-to-reveal” durations. Daily Streak & Rewards: Play every day to earn credits, streak badges, and unlock hidden premium artworks. Weekly content updates: Fresh pixel-art puzzles added regularly to spark new inspirations. Whether you have a few minutes or an hour, Pixel Therapy offers a calming creative escape that sharpens focus and delivers satisfying progress—one pixel at a time. Rediscover relaxation through art therapy and color your way to peace.
Screenshots
Verdict
The clearest difference is ads: Not Evil Sudoku at none against PixelTherapy's shown. Not Evil Sudoku also leads on ratings volume (1.1K vs 3). PixelTherapy's advantage is rating (5.0 vs 4.6) and review sentiment (100% vs 75%). On price, in-app purchases, monetization model 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. Not Evil Sudoku sells 1 one-off in-app purchase and PixelTherapy sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
PixelTherapy holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Not Evil Sudoku has 1.1K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 75% of Not Evil Sudoku's written reviews are positive against 100% of PixelTherapy's.
Not Evil Sudoku ships an update every 9 days, PixelTherapy every 4 days. The most recent releases landed on October 25, 2026 and October 20, 2026 respectively.
| Parameter | Not Evil Sudoku | PixelTherapy |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (1.1K ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 74.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 1.1K — better | 3 |
| Update frequency | Every 9 days | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15 — better | 15.6 |
| Further details — not scored | ||
| Size | 23 MB | 125 MB |
| Age rating | 4+ | 17+ |
| Developer | Ashish Selvaraj | Eugenio Keller Puente |
Customer experience
Not Evil Sudoku
PixelTherapy
Bugs and requests
Not Evil Sudoku
Reported bugs
2 issues- Disappearing numbers when closing the app
- Numbers swapping to incorrect spots
Requested features
6 requests- Add auto-clear notes option without move validation
- Provide more theme color options
- Implement a 'warm' mode similar to other sudoku apps
- Add ability to remove notes after number is placed
- Highlight all instances of a number in the puzzle
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- Remove a number as a choice when it has been placed successfully
PixelTherapy
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Not Evil Sudoku
- Pro$4.99
PixelTherapy
- Pixel Therapy Premium$2.99









