Number Workshop vs Iromizu
Price, ratings, monetisation and update history for both games, side by side โ with what reviewers say about each.
Number Workshop
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Every tile you place has to satisfy two equations at once โ the one running across, and the one running down. Number Workshop is a crossword built out of arithmetic, and the only way through a grid is to make all of it true at the same time. HOW IT PLAYS You get a grid with blanks in it and a tray of number tiles. Drop a tile into a blank and both equations it sits on have to hold. Get one wrong and the grid tells you straight away. Clear the whole board and you earn up to three stars, scored on how accurate you were and how quickly you finished โ three stars means you did it without a single mistake. Stuck on a blank? Spend a hint. You start with three. THREE WAYS TO PLAY Campaign โ Six skill tiers that build on each other: Add & Subtract, Multiply & Divide, Mixed Ops, Brackets, Unknowns, and Master. Levels keep generating, so the campaign does not run out. Endless โ One grid after another against the clock. Solve fast enough and you keep going. Every round is harder than the one before it. Daily โ One puzzle a day, the same grid for every player in the world. First clear pays 40 coins plus 10 for each star. EARN AND SPEND Coins come from clearing levels, collecting stars, finishing the daily, completing daily quests, and watching an optional rewarded video. Spend them on hints, or on tile skins, board themes and win celebrations that change how the game looks while you play. COMPETE Separate global leaderboards for Campaign and Endless. Your rank sits pinned at the bottom of the board, so you always know exactly how far you have to climb. WORTH KNOWING BEFORE YOU INSTALL An internet connection is required. Your progress is stored on our servers rather than on the device, which is what lets a save follow you to a new phone. You can play straight away as a guest โ no account needed. Linking a Google or Apple account is optional and exists for one reason: a guest save lives only under your device's anonymous ID, so uninstalling or switching phones loses it. Link an account and it follows you. The game shows ads between levels. Rewarded videos are always optional and only ever play when you choose to watch one. A one-time Remove Ads purchase clears the between-level ads and keeps rewarded videos available, so you can still earn coins from them. Number Workshop is free to play. Optional in-app purchases let you buy coins, but every coin can also be earned by playing, and no level, mode or feature is ever locked behind a purchase.
Iromizu
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"Wait โ is this level even solvable?" If you have ever stopped mid-puzzle and wondered that, Iromizu was made for you. EVERY BOARD IS CHECKED TO BE SOLVABLE Before a level reaches you, the app solves it all the way through. Only boards that came out solvable are handed to you. If you still paint yourself into a corner, the app tells you how many moves to take back. Undo is unlimited. BEYOND "CLEARED" THERE IS "IMPROVED" Every board has a known shortest solution, and three stars means you found it. Replay any level you have cleared, as often as you like. Twelve moves yesterday, nine today โ the difference comes back to you as a number. FEATURES - A calm color sort puzzle: tap a vessel to lift it, tap another to pour - Endless, generated levels that start with three colors and grow from there - Daily puzzle: one board set by the date, for that day only - Shortest-move target and three-star rating - Dead-end detection that tells you how far to step back - Hints that show a next move that keeps the board solvable - Unlimited undo - Your record: levels cleared, total stars, daily streak JAPANESE COLORS IN GLASS Beni crimson, ruri blue, yamabuki gold, tokiwa green, asagi teal, fuji wisteria. The palette comes from traditional Japanese colors. The glass, the water and the light are drawn without photos or illustrations, so the art stays crisp on any screen. Even the sounds are made on the spot: a soft landing, a sway, then stillness. MADE FOR YOU IF - Too many ads made you quit sorting puzzles - You have ever suspected a board could not be solved - You prefer a quiet feel to flashy effects - You want ten calm minutes before bed or on the train - You love Japanese colors and the feel of handmade things PRIVACY - No account and no sign-in - Everything you play is saved on this device and never sent anywhere - The puzzles work without a connection, on a plane or underground - No third-party ad networks. The only thing promoted is other apps I made myself (TORANKIRITE) - To show those, the app may load public App Store information (app names and icons). None of your information is sent
Screenshots
Verdict
The clearest difference is ads: Iromizu at none against Number Workshop's shown. Number Workshop's advantage is update cadence (every 6 days vs every 3 weeks) and iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Number Workshop sells 5 one-off in-app purchases and Iromizu sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Number Workshop ships an update every 6 days, Iromizu every 3 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.
| Parameter | Number Workshop | Iromizu |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 days โ better | Every 3 weeks |
| Ads | Yes | No โ better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPad |
| Requires iOS | 15.0 โ better | 17.0 |
| Further details โ not scored | ||
| Size | 55 MB | 1 MB |
| Age rating | 12+ | 4+ |
| Developer | Yi Hong Lim | torankirite |
In-app purchases
Number Workshop
- Small Coins Pack$0.99
- Medium Coins Pack$1.99
- No Ads$2.99
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- Large Coins Pack$3.99
- Colossal Coins Pack$9.99
Iromizu
- Premium$4.99









