Comparison

Sudoku Rabbit vs ECHO

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Sudoku Rabbit

Enjoy a seamless Sudoku experience with no un-skippable ads and a one-thumb-friendly design. Compete with friends in real-time, tackle daily challenges, and customize your gameplay with endless puzzles and fun options.

Highlights
  • Endless offline puzzles
  • Real-time competitive play
  • One-thumb controls
  • Daily challenges and rankings
  • Profile and gameplay customization
  • Dark theme and hardcore mode
Features
Read full description

Sudoku Rabbit is sudoku you can play with one hand. Modern controls let you reach any cell from the bottom half of the screen, so you can solve one-handed, or even with one thumb. Say goodbye to awkwardly stretching across the board, and keep the other hand free for an ice cream cone. Classic controls are still available if you prefer them. Then, turn your daily solve into a real competition. Complete our daily puzzles to see your rank and percentile on the leaderboard the next day. Monthly and yearly seasons add up those percentiles to determine your Sudoku Power. Earn trophies for your rank and cement your place in competitive sudoku history! Four brackets let you compete against players who play the way you do: • Normal: Solve it your way. • Hardcore: Every assist is off. • Blitz: Candidates are already marked. Built for speed. • Masters: Extremely hard. One mistake ends the run. Learn techniques that help you climb the ranks: hidden singles, naked pairs, pointing pairs, box line reduction, X-Wing, Y-Wing, and Swordfish. Hints name the technique and teach you how to apply it, so you can add it to your sudoku arsenal. Additional features: • 250,000 puzzles available offline, so you can play on a plane, a train, or anywhere without a signal. • Share a puzzle seed and see your friends’ live progress as you race to solve them the same puzzle. • Memos update automatically when you place a number, so you never have to stop to erase leftover notes. • Extensive customizable options let you play exactly how you want. • Ask the Great Turtle Sage for a hint when you're stuck, so you can keep solving instead of guessing. • No forced ads, for a smooth, uninterrupted experience. Download today. Sudoku with one hand, and hold your trophies (or ice-cream!) with the other.

About

ECHO

This puzzle game challenges you to cooperate with recordings of your past actions. Solve intricate levels by coordinating with your "echoes" to overcome obstacles and complete complex sequences.

Highlights
  • Time-loop gameplay
  • 100 campaign levels
  • Daily puzzles
  • Endless Zen mode
  • Time challenge mode
  • Offline play
  • Live synthesized music
Features
Read full description

Your echoes are your teammates. ECHO is a time-loop puzzle: every run is recorded, and when you press ECHO, your past self replays it - step by step, loop after loop. Hold plates for each other, open doors across time, and thread paths no single runner could ever take. EASY TO LEARN, DEEP TO MASTER - 100 campaign levels across ten decades, from gentle first steps to choreographed finales - Mechanics that weave together: chained doors, counter-doors, double doors, fragile floors, beat walls, paradox boards and mirror echoes that replay your run backwards - Handcrafted signature levels where every single step must be planned FOUR WAYS TO PLAY - Campaign: 100 levels with a carefully tuned difficulty curve - Daily puzzle: one fresh board every day - keep your streak alive - Zen: endless generated puzzles in six difficulties - Time challenge: how many boards can you solve in one run against the clock? MADE WITH CARE - Completely offline: no account, no ads, no tracking, no data collection - Music is synthesized live on your device - no two sessions sound the same - Home-screen widget that grows with your streak - and hides a secret level - Game Center leaderboards and achievements - Available in 7 languages ECHO is free and complete from the first minute. The only purchases are voluntary tips for the developer - they unlock nothing. Your past self is waiting.

Screenshots

Sudoku Rabbit4 screens
ECHO4 screens

Verdict

The call

The clearest difference is rating: Sudoku Rabbit at 4.8 against ECHO's 4.0. Sudoku Rabbit also leads on ratings volume (36 vs 4). ECHO's advantage is in-app purchases (none vs 1) and ads (none vs shown). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sudoku Rabbit sells 1 one-off in-app purchase. ECHO asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sudoku Rabbit holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Sudoku Rabbit has 36 ratings behind it against 4, so its average is the more settled of the two.

UpkeepUpdate frequency

Sudoku Rabbit ships an update fortnightly, ECHO every 3 days. The most recent releases landed on October 25, 2026 and October 22, 2026 respectively.

Scorecard6 real differences · 4 level
Sudoku Rabbit versus ECHO: the parameters behind the verdict, then further details
ParameterSudoku RabbitECHO
PriceFreeFree
Rating4.8 (36 ratings) — better4.0 (4 ratings)
Positive reviews68.4% of reviews—
Number of ratings36 — better4
Update frequencyFortnightlyEvery 3 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad — betteriPhone
Requires iOS16.4 — better17.0
Further details — not scored
Size81 MB3 MB
Age rating4+4+
DeveloperZhun Wah Edward LuiLucas Hesseldieck

In-app purchases

1 purchases

Sudoku Rabbit

One-time1
  • Remove Ads$7.99
None

ECHO

No in-app purchases

Questions

Is Sudoku Rabbit free?
Sudoku Rabbit is free to download, with in-app purchases available.
Is ECHO free?
ECHO is free to download, with no in-app purchases.
Which has better reviews, Sudoku Rabbit or ECHO?
Sudoku Rabbit is rated higher. Sudoku Rabbit averages 4.8 out of 5 from 36 ratings, while ECHO averages 4.0 from 4 ratings.
Do Sudoku Rabbit or ECHO have ads?
Sudoku Rabbit shows ads; ECHO does not.
Which is updated more often, Sudoku Rabbit or ECHO?
Sudoku Rabbit ships an update fortnightly, and ECHO every 3 days. Most recently, Sudoku Rabbit was updated on October 25, 2026 and ECHO on October 22, 2026.

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