21Moves | Cube Puzzle Solver vs Chess Clock & Scorepad
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
21Moves | Cube Puzzle Solver
This app helps you solve your Rubik's Cube with visual, step-by-step instructions. It offers a quick solver, a cube scanner to analyze your current puzzle state, and even identifies missing or misplaced pieces. Become a puzzle-solving pro and improve your concentration and speed.
- 3D cube scanning
- Visual step-by-step instructions
- Quick cube solving
- Cube fixer for missing/misplaced pieces
- Puzzle skill building
- Manual input for custom combinations
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Stuck on how to solve your Rubik's Cube? 21Moves has your back. Solve your magic cube in under 3-minutes with visual step-by-step instructions to help you become a puzzle solving pro. 21Moves provides you with a visual guide on how to solve your cube in under, you guessed it, 21 moves! Dive into the easiest, most efficient way to solve one of the most popular puzzles enjoyed by millions. Join over 3 million cubers who have used 21Moves to develop top problem-solving and pattern recognition skills. Save hours of frustration with simple instructions guiding you to solve your cube in a matter of minutes. Improve your concentration and speed over time to show off your Rubik’s cube solving skills to the world. Getting started with 21Moves is simple. Simply scan a 3D model of your cube and get step-by-step directions on how to solve it. You get a personalized guide for solving your magic cube no matter its current state. 21Moves also recommends fixes for your cube if a piece is missing or placed incorrectly. Download the ultimate Rubik’s cube solver and get easy to follow visual instructions that are sure to turn you into a magic cube master. 21MOVES FEATURES CUBE SCANNER - Getting started on your magic cube solution is easy with in-app scanning tools - Simply perform a 3D scan of your current cube using your camera and get started - 21Moves provides simple and clear instructions on how to approach your cube - You can also manually input your existing cube on 21Moves blank template for custom combinations QUICK CUBE SOLVER - 21Moves provides you with detailed instructions to solve your cube in just a few minutes - Test your problem solving skills as you reorganize your magic cube in under 21 moves - Easily reset a cube to solve it again - Avoid the hours of frustration that come with manually learning to solve a cube thanks to 21Moves CUBE FIXER - Solve puzzles and maintain your cube by identifying missing pieces or misplaced blocks - Fix your cube in minutes and get back to solving PUZZLE SKILL BUILDING - Become a problem-solving pro as you learn the ins and outs of solving different Rubik’s cube formats - Identify patterns after resolving puzzles to make it easier to tackle the next one - Memorize solutions and increase your speed as you progress through different combinations See what users are saying: • "My cube was pretty messed up yet this app managed to solve it in just 20 moves”. • "OMG It actually works! I thought it would be a gimmick… I’m SHOCKED! Thank you so much!” • "My cube was pretty messed up yet this app managed to solve it in just 20 moves”. • "It fixes ur Rubik’s cube in less than two minutes”. • "[...] I’ve tried this app and guess what happened it worked I always doubted on all these other fake rubiks apps solvers but this specific app is the best one”. • "[...] Simple, elegant, and user friendly for quite literally any age. Plus it makes you feel like a genius!” ------------ Questions or feedback? We read every single email and review. Get five-star customer service directly from the developer at nico@opitas.io or at https://bit.ly/3hoFQkN. Disclaimer: All company names (Rubik’s Brand Ltd) are trademarks or registered trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Chess Clock & Scorepad
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Chess Clock & Scorepad is a two-player chess clock on one phone. Put it on the table between you, tap your side after each move, and the other clock starts. It can also record the game: make each move on the board and the clock presses itself, then review the game or share it as PGN. A CLOCK FOR OVER-THE-BOARD CHESS - 15 ready time controls, from 1-minute bullet through blitz and rapid to the FIDE 90/40 + 30 classical control - Fischer increment, Bronstein, and US delay, each timed exactly - Multi-stage controls: the next stage's time arrives with the last move of the stage - Save up to 12 controls of your own, with names - Handicap: give the stronger player less time - The press registers the moment your finger lands, like slapping a real clock - Low-time warnings at 5 min, 2 min, 1 min and 30 s, and a red face when a flag falls - Pause, take back a mis-press, or add time while the clock is paused - A sideways table layout, with the faces turned toward each player A SCORESHEET THAT KEEPS ITSELF - Play clock only, clock and scoresheet, or scoresheet only - Tap a piece, then its square. Only legal moves can be made, and the clock presses itself - One tap is enough when only one piece can reach the square - Each face shows captured pieces and the material lead - The opening is named as you play, from the public-domain lichess opening list - Automatic draws by fivefold repetition and the 75-move rule; draws by agreement and resignation ask first, so one slip can't end the game REVIEW AND SHARE - Step through any game move by move, turn the board, and see a chart of the time each move took - Clock use for each player: the average move, the longest think and the moves played in time trouble - Mark moves and add comments, saved in standard PGN notation - Share or copy a game as PGN, with each move's clock time included, or open it for analysis on lichess - Export every game as one PGN file, or import games from a file or the clipboard (lichess and chess.com exports) YOUR GAMES STAY ON YOUR PHONE - Your games listed by month, with totals and a head-to-head record for two named players - A record for every player you name: with White and Black, by time control, against each opponent and in each opening - No account and no sign-in. Games leave the phone only when you share or export them - The clock pauses when the phone goes to the background, and a game reopens on the same move MADE FOR THE TABLE - Four board themes: slate, walnut, tournament and marble - Clock sounds you can turn off, and vibration - Large digits, large text support and screen readers: a screen reader can play every move - On an iPad or an unfolded iPhone Duo, the Games list and the player list keep the game or record you pick open beside them FREE, WITH A SMALL BANNER Banner ads appear on the home screen, in the Games list, in player records, in review and in Settings. Never on the running clock or the scorepad. Nothing to buy. Chess pieces: the Cburnett set (BSD licence). Opening names: lichess chess-openings (CC0).
Screenshots
Verdict
The clearest difference is in-app purchases: Chess Clock & Scorepad at none against 21Moves | Cube Puzzle Solver's 10. 21Moves | Cube Puzzle Solver's advantage is ads (none vs shown). On price, update cadence, 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
Both are free to download. 21Moves | Cube Puzzle Solver sells 9 in-app purchases, starting at $1.99 per month. Chess Clock & Scorepad asks for nothing beyond the download.
21Moves | Cube Puzzle Solver ships an update weekly, Chess Clock & Scorepad every 11 days. Both last shipped on November 10, 2026.
| Parameter | 21Moves | Cube Puzzle Solver | Chess Clock & Scorepad |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (60K ratings) — better | — |
| Positive reviews | 69.6% of reviews | — |
| Number of ratings | 60K — better | — |
| Update frequency | Weekly — better | Every 11 days |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 157 MB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | Opitas Inc. | Illumination Development, L.L.C. |
Bugs and requests
21Moves | Cube Puzzle Solver
Reported bugs
3 issues- Scanning issues due to lighting conditions
- App crashing or freezing after first use
- Inaccurate cube representation on screen
Requested features
3 requests- Support for different cube sizes (2x2, 4x4, etc.)
- Option to skip tutorial
- Ability to solve cube without payment
Chess Clock & Scorepad
Not enough reviews yet to summarise bugs or requests.
In-app purchases
21Moves | Cube Puzzle Solver
- Unlimited Access$1.991 Month
- Unlimited Access$3.991 Month
- Unlimited Access2 variants$4.991 Year
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- Unlimited Access$7.991 Year
- Unlimited Access$14.991 Year
- Unlimited Access$19.991 Year
- Unlimited Access$24.991 Year
- Unlimited Access$29.99
- Unlimited Access$74.99
Chess Clock & Scorepad
No in-app purchases
Questions
Is 21Moves | Cube Puzzle Solver free?
Is Chess Clock & Scorepad free?
Do 21Moves | Cube Puzzle Solver or Chess Clock & Scorepad have ads?
Which is updated more often, 21Moves | Cube Puzzle Solver or Chess Clock & Scorepad?
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