SudokuSmart vs Odd One
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
SudokuSmart
Engage with hundreds of number puzzles, master advanced solving techniques, and challenge friends. Offers daily, weekly, and monthly competitions with prizes. Includes a step-by-step helper and extensive customization options for all skill levels.
- Daily and Weekly Sudokus with global leaderboard
- Monthly tournaments with prizes
- Step-by-step solving method helper
- 750+ permanent levels of all difficulties
- Scan Sudoku from photos
- Customization options
- Sandbox mode with advanced tools
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SudokuSmart is the perfect companion for anyone that enjoys number puzzles. Play hundreds of grids, learn the most advanced sudoku methods, and compete with your friends - all for free and without intrusive advertisements. Tailored to all skill levels, there is so much SudokuSmart has to offer: - Daily and Weekly sudokus connected to a global leaderboard -Monthly tournaments with prizes - Helper that provides step-by-step visual assistance on numerous solving methods - 750+ permanent levels of all difficulties, including Alternating-Inference-Chains - Exhaustive settings and customisation options - Sandbox with powerful tools (solving path, auto-solve, candidates, difficulty rating) Possibilities are endless: - Scan a sudoku from Photos and start playing in seconds - Send notification reminders to your friends to maintain their streaks’ - Unlock profile pictures and completion animations - Highlight specific candidates different colours The best part? SudokuSmart will keep improving, fueled by the feedback of players. Start playing now, and get your say in the next big update.
Odd One
A minimalist brain-training puzzle game where players identify the single tile that breaks a pattern in a grid. It offers four distinct game modes, including classic, arcade, endless, and daily challenges, all designed for calm, logical play.
- Four distinct game modes
- Minimalist brain-training puzzles
- Handcrafted and generated levels
- No timer or time-based challenges
- Color-assist mode for color-blind players
- Light and dark mode
- Calm piano soundtrack
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A grid of symbols. One breaks the hidden rule - colour, shape, size, count or pattern. Tap exactly that one. That is all you need to know, and that is exactly why it is so much fun. FOUR MODES - Classic: 300 levels, no clock, pure logic. From level 151 the Extreme World adds patterns as a fifth dimension. - Arcade: a 60-second time bank. Right answers earn time, wrong ones cost it. - Endless: three lives, no time pressure. Four tiers up to Extreme. - Daily: five puzzles a day, the same for everyone worldwide. One chance. ON YOUR HOME SCREEN - A widget with your daily status and a playable mini puzzle - in three sizes FAIR AND CALM - Completely free: no ads, no tracking, no account, no paywall - A voluntary tip jar is the only source of income - it unlocks nothing - Calm piano music, light and dark design, alternate app icons - Colour assist for colour-blind players, full VoiceOver support - Game Center: leaderboards and 13 achievements, iCloud sync - Fully localised (EN, DE, FR, IT, ES) Odd One is the first game from earls studio, Munich.
Screenshots
Verdict
The clearest difference is review sentiment: SudokuSmart at 100% against Odd One's 92%. On price, update cadence, ads 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. Neither carries in-app purchases, so what you see is what you pay.
SudokuSmart ships an update every 2 weeks, Odd One weekly. The most recent releases landed on September 18, 2026 and September 23, 2026 respectively.
| Parameter | SudokuSmart | Odd One |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (18 ratings) — better | — |
| Positive reviews | 100.0% of reviews — better | 91.7% of reviews |
| Number of ratings | 18 — better | — |
| Update frequency | Every 2 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 32 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Felix Johnson | Lucas Hesseldieck |
Customer experience
SudokuSmart
Odd One
In-app purchases
SudokuSmart
No in-app purchases
Odd One
No in-app purchases









