Sudoku Sagax vs Catando
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Sudoku Sagax
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Sudoku Sagax is Sudoku with real progression: solve levels, collect points and stars, climb through 19 fox ranks and take on everyone else in the daily challenge. Nona the vixen shows you around and explains every new puzzle type in half a minute. ELEVEN PUZZLE TYPES • Sudoku in four difficulties, from Easy to Extreme • Killer Sudoku, Kakuro, Nonogram, Crowns, Binary puzzle • X-Sudoku, Jigsaw Sudoku, Mini 6x6 and the big 16x16 • Foxhold: Sudoku as tower defence, our very own game Every type has its own levels, its own best times and its own leaderboard. DIFFICULTY BY TECHNIQUE In classic Sudoku, difficulty follows the techniques a puzzle calls for, not the number of givens: Easy needs singles, Extreme asks for X-Wing and XY-Wing. In the game you see which technique is needed, and after a win, what you solved it with. Every level of every puzzle type can be solved without guessing, with logic alone. DAILY CHALLENGE AND STREAKS One puzzle a day, the same for everyone, with its own daily leaderboard. Solve on consecutive days and your streak grows. Streak shields cover a missed day, so a busy calendar does not undo weeks of work. RANKS, STARS, ACHIEVEMENTS Every solved level counts towards your rank: 19 tiers from Fox Cub to Sagax Immortalis, each with its own fox portrait as a profile picture. Add up to three stars per level and 39 achievements. DUELS AGAINST FRIENDS After a win, challenge someone with a link: they play exactly the same puzzle against your time. No account needed on their side. THOUGHT THROUGH IN DETAIL • A tip that shows you the next technique instead of giving away the digit, plus notes, eraser and undo • Mistakes shown instantly or only at the end, your choice • Digit-first mode for fast entry • Light and dark themes, in ten languages • Puzzles are generated locally, so a dead spot will not stop you You can start playing without an account. With a free account (sign in with Google or Apple), your progress, streak and leaderboard position follow you across devices, including between app and browser. Sudoku Sagax is free, with no ads and no in-app purchases. The den is open. How far will you get?
Catando
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Catando is a cozy logic puzzle about cats and dogs. Fill the grid so every row and column has the same number of cats and dogs, never three of the same in a row, and every = and × clue is respected. Simple rules, satisfying "aha!" moments, and every puzzle can be solved by pure logic. No guessing. DAILY PUZZLE A fresh puzzle every day, the same for every player. Solve it to build your daily streak, and if you miss a day you get one grace day to rescue it. The daily ramps through the week, from easiest on Monday to hardest on Sunday. Solving it also earns you a hint. DAILY RECAP Come back the next day and see how you did: your solve, which team won yesterday and whether your team won or lost, the Energy you contributed, the rewards you earned, and where you rank. A good day earns Energy and items, and you can watch a short ad to double your prize. STAGE MODE Work through an endless run of stages. Every 10 stages ramp from easy to hard, and the board grows from 6×6 up to 10×10 as you improve. Clear stages to earn Energy and milestone bonuses, plus a hint for every 3 stages you clear. Every puzzle shows its difficulty at a glance: green for easy, orange for medium, red for hard. Check how your stage ranks against other players worldwide. Stage 1 is a guided 6×6 tutorial that teaches every rule one step at a time. Stuck? Hints point to a useful tile and explain why. Made a mess? Clear the stage to restart it with all your hearts. CAT VS DOG POWER Pick a team, cat or dog, and pitch in your Energy to the daily team tally. Watch the power bar move and see which side wins the day. Every stage you clear adds its Energy to your team's power right away. Once you've joined a team, watch your Energy bolt into its mascot on Home after you clear a stage. WAR BOARD Every player joins the global War Board automatically. See how your country, continent and team stack up against players around the world, and watch your Energy count toward your country. Your name stays hidden unless you choose to show it in Profile. TRACK YOUR PROGRESS A login-streak dashboard with a 7-day paw row, a 14-day activity chart, best times for every board size, your worldwide rank, and 12 badges to collect, from your first solve to a clean no-hint daily. LOOKS Choose how the cats and dogs look on the puzzle grid. Each team has five looks: Classic and one more are free, and the other three are one-time purchases, one at a time or in a Meow Pack or Woof Pack. Pick one cat look and one dog look in Settings > Looks. With Catando Plus, every look is unlocked while you subscribe. WHY YOU'LL LOVE IT • Relaxing brain training in short sessions • No account or sign-in required • No timers or pressure. Take all the time you want • Works offline • Soft, rounded pastel design with cute cat and dog mascots • Haptics (on/off) and sound effects with separate gameplay and celebration volume controls If you like binary puzzles, takuzu or sudoku-style logic games, you'll feel right at home. Download Catando and solve today's puzzle! Catando is free to play and supported by ads, or remove ads with a one-time purchase. Optional Remove Ads subscription: monthly, auto-renews until canceled in Settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Catando Plus (optional subscription): monthly, removes ads and unlocks every look while you subscribe; auto-renews until canceled in Settings. Looks can also be bought one at a time or in packs. Looks you buy separately stay yours.
Screenshots
Verdict
The clearest difference is in-app purchases: Sudoku Sagax at none against Catando's 10. Sudoku Sagax also leads on update cadence (every 2 days vs every 5 days) and device support (3 vs 1). On price and ads 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. Catando sells 10 in-app purchases, starting at $1.99 per month. Sudoku Sagax asks for nothing beyond the download.
Sudoku Sagax ships an update every 2 days, Catando every 5 days. Both last shipped on October 31, 2026.
| Parameter | Sudoku Sagax | Catando |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days — better | Every 5 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 17 MB | 39 MB |
| Age rating | 12+ | 4+ |
| Developer | Vulpes Sagax UG (haftungsbeschränkt) | Kairos.ai Co., Ltd. |
In-app purchases
Sudoku Sagax
No in-app purchases
Catando
- Remove Ads (Monthly)$1.991 Month
- Golden Retriever Look$1.99
- Husky Look$1.99
- Calico Cat Look$1.99
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- Corgi Look$1.99
- White Cat Look$1.99
- Orange Tabby Look$1.99
- Woof Pack$3.99
- Meow Pack$3.99
- Remove Ads$4.99









