kubic vs Circle Master
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
kubic
This optical illusion puzzle game challenges players to construct impossible structures inspired by M.C. Escher's art. With a clean design and minimalistic graphics, it offers over 60 mind-bending puzzles across various geometric and spatial themes. Features include layer locking, zoom, and an in-game hint system to aid progression.
- Optical illusion puzzles
- M.C. Escher inspired designs
- Geometric and impossible objects
- Layer locking and manipulation
- Zoom and view controls
- In-game hint system
- Progress syncing via iCloud
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***** #1 Puzzle Game in over 20 Countries! ***** ***** "This quirky puzzle game bends the limits of space and reality to make you create structures that, in theory, should be impossible to replicate." - Pocket Gamer 8/10 ***** ***** "As soothing as it is challenging, this grown-up puzzler opened our minds. Time flew by as we recreated sculpture after sculpture in increasingly difficult configurations. The game’s 3D graphics invite focus and sharpen problem-solving skills, making it an entertaining brain-builder. M.C. Escher would be impressed by the twisty, physics-defying structures." - App Store Notes ***** kubic is a unique optical illusion puzzle game based on M.C. Escher's art, impossible objects and other geometric designs. The object is to construct the goal configuration from a number of pieces. Presented in a simple, clean design and minimalistic art, kubic is a premium game with over 60 escher-esque puzzles. When you click on a piece, it pops to the front-most layer, and may overlap other pieces. When you combine the pieces, they do not merge. If there are extra pieces, you may hide them behind the others. You can also lock layers and drag pieces without changing their layer order. You can also use two finger pinch to zoom in and out and drag the view for a better control. If you are stuck on a puzzle you can simply skip it and re-visit at a later time. Rest assured, all puzzles can be solved but beware, some puzzles are hard! Just take your time...Tip: It helps to plan ahead and build figures from back to front. If you truly get stuck, there is a in-game hint system. You can use it to get started or even get the whole puzzle solved. Levels divided in 6 groups: • Ocean - "2D" Shapes are basically two-dimensional arrangements. • Desert - "3D" Shapes appear to be three-dimensional, but remember to think in two dimensions. • Mountain - "Convex/Concave" These optical illusions are inspired by Escher's famous "Convex and Concave" lithograph. • Sky - "Up/Down" These optical illusions are inspired by the Penrose Triangle featured in Escher's lithograph "Waterfall”. • Escher - Based on letter designs that spell out MC ESCHER. • Print - Based on the printable magazine version of Convex-Concave puzzles. Kubic is localized and supports 12 languages including English, French, German, Italian, Japanese, Korean, Chinese (simplified), Chinese (traditional), Portuguese, Russian, Spanish, and Turkish Game supports iCloud for progress syncing between devices. Convex Concave puzzles from the Heaven and Earth game are included with permission. The puzzles were designed by Scott Kim, Puzzlemaster (scottkim.com), and the Heaven & Earth team. Enjoy!
Circle Master
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Draw a perfect circle with one finger. Sounds easy — it isn't. Circle Master gives you one dot and one rule: draw a full circle around it in a single, unbroken stroke. Wobble, cut the corner or stop halfway, and your score drops. Nail it, and you get the number every player is chasing: 100%. HOW TO PLAY • Put your finger on the screen and circle the dot • Keep a steady pace — too slow and the attempt doesn't count • Don't stop, don't reverse, don't drift toward the center • Release, and see your accuracy as a percentage WHY IT'S ADDICTIVE One attempt takes three seconds. And you are always one percent away from your own record. "Just one more try" never means one more try. FEATURES • Instant scoring — accuracy in percent after every stroke • Global leaderboard — pick a nickname and climb the world ranking • 20+ achievements, from your first full circle to tricks you won't see coming • Hints and a sample circle whenever you need a reference • Clean, minimal design — nothing between you and the line • One-handed play, anywhere, in any spare minute • Five languages: English, Russian, Spanish, Dutch and Japanese Perfect for a break, a waiting room, or a bet with a friend over who has the steadier hand. How round can you go? Download Circle Master and find out.
Screenshots
Verdict
The clearest difference is in-app purchases: Circle Master at none against kubic's 5. Circle Master also leads on update cadence (daily vs every 2 months). kubic's advantage is iOS requirement (13.0 vs 15.0). On price, ads and device support 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. kubic sells 5 one-off in-app purchases. Circle Master asks for nothing beyond the download.
kubic ships an update every 2 months, Circle Master daily. The most recent releases landed on October 12, 2026 and October 10, 2026 respectively.
| Parameter | kubic | Circle Master |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (245 ratings) — better | — |
| Positive reviews | 36.4% of reviews | — |
| Number of ratings | 245 — better | — |
| Update frequency | Every 2 months | Daily — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 383 MB | 124 MB |
| Age rating | 4+ | 4+ |
| Developer | Pixel Envision Ltd. | Aliaksei Smaliuk |
Bugs and requests
kubic
Reported bugs
5 issues- Tiles not sticking correctly
- App won't launch offline
- App won't load/crashes on launch
- In-app purchase attempts forced
- Bug with in-app purchase activation
Requested features
5 requests- Fix tile placement issues
- Improve difficulty curve
- Option to rotate puzzles
- Option to lock in pieces
- Dark mode for night play
Circle Master
Not enough reviews yet to summarise bugs or requests.
In-app purchases
kubic
- 10 Hints$0.99
- No Ads$1.99
- 25 Hints$1.99
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- 50 Hints$2.99
- 100 Hints$3.99
Circle Master
No in-app purchases









