NumChain vs Odd Machines
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
NumChain
This number puzzle game sharpens mental math skills through engaging gameplay. Connect numbers to form chains, sums, and products across three distinct modes. Compete globally, earn achievements, and enjoy a clean, intuitive interface designed for all ages.
- Three game modes: Chains, Sums, Multiplication
- Global leaderboards and achievements
- Hint system for challenging puzzles
- Intuitive interface and clean design
- Optimized for iPhone and iPad
- Develops mental calculation and strategic thinking
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NumChain is a number puzzle that trains your mental math. Connect numbers on the board to build chains, sums and products, collect badges and beat your high score. THREE GAME MODES • CHAINS: Join consecutive numbers on the board and build the longest chain you can. • SUMS: Connect adjacent numbers to make sums and test your mental agility. • MULTIPLICATION: The ultimate challenge for math lovers. Multiply connected numbers and master the times tables. HINTS WHEN YOU'RE STUCK ‣ Earn points and spend them on hints. ‣ Reveal a strategic move or the solution when a puzzle gets tough. COMPETE WORLDWIDE ‣ Compete against players from around the world. ‣ Global leaderboards with Game Center. ‣ Transparent and fair scoring. ‣ Special achievements to unlock. FEATURES YOU'LL LOVE ‣ Exclusive medals and badges for your achievements. ‣ Intuitive interface and clean design. ‣ Play in portrait or landscape. ‣ Optimized for iPhone, foldable iPhone and iPad. ‣ Smooth, satisfying animations. BENEFITS FOR YOUR MIND ‣ Faster mental calculation. ‣ Strategic thinking and planning. ‣ Stronger visual and spatial memory. ‣ Better concentration. ‣ Basic and advanced math skills. ‣ Quick problem solving. ‣ Perfect for all ages. PERFECT FOR ‣ Students who want to improve their math skills in a fun way. ‣ Gamers who enjoy mental challenges. ‣ Adults who want to keep their mind sharp and active. ‣ Families looking for quality educational entertainment. ‣ Teachers looking for new learning tools. ‣ Competitive players who want to climb the world rankings. Practice regularly with NumChain to sharpen your math and thinking skills and climb the global leaderboard. Download NumChain now and train your brain with numbers!
Odd Machines
Embark on a 3D escape room adventure as a treasure hunter seeking a lost artifact. Solve intricate mechanical puzzles, uncover hidden objects, and unravel mysteries within an ancient temple. Collect fragments of a powerful stone to escape.
- Solve unique puzzle boxes
- Explore an ancient temple
- Collect fragments of a lost stone
- Immersive audio experience
- Multi-language support
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You are a legendary treasure hunter, looking for the Stone of Silence, a powerful artifact that got lost in an old temple. There, you will find a series of weird machines full of puzzles to crack to gain your freedom! Odd Machines: Lost Artifacts is a 3D escape room puzzle game where you have to solve complex mechanical puzzles, discover hidden objects, and unveil intriguing mysteries! Dive into a world where cryptic vibes, complex mechanisms, and smooth controls from top escape room games blend to challenge your brain skills. You'll tackle unique puzzle sets on a mysterious, gripping adventure. Every machine is crafted to deliver the ultimate escape and exploration thrill. Play the first 3 levels for free! SOLVE UNIQUE PUZZLE BOXES Embark on a puzzling adventure with an eclectic mix of original Victorian machinery, classic and architectural enigmas EXPLORE AN ANCIENT TEMPLE Step into a mesmerizing world where every move you make reveals new mysteries and changes! COLLECT ALL THE FRAGMENTS OF THE STONE OF SILENCE Once you get all 8 pieces of the lost stone, you'll be transported into a mystical scene where you'll have to crack numeric puzzles to put the pieces together and finally escape the temple IMMERSIVE AUDIO The sound effects and tunes are so mind-blowingly good that will whisk you away on an unforgettable, vibe-filled adventure! MULTI-LANGUAGE SUPPORT* Odd Machines: Lost Artifacts is available in English, French, German, Italian, Japanese, Korean, Portuguese, Russian, and Spanish. *The game language changes based on the device settings
Screenshots
Verdict
The clearest difference is review sentiment: NumChain at 100% against Odd Machines's 61%. NumChain also leads on update cadence (monthly vs every 2 months). Odd Machines's advantage is ads (none vs shown) and iOS requirement (15.0 vs 18.0). On price, in-app purchases, monetization model 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. NumChain sells 5 one-off in-app purchases and Odd Machines sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
NumChain ships an update monthly, Odd Machines every 2 months. Both last shipped on November 4, 2026.
| Parameter | NumChain | Odd Machines |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.3 (89 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 61.1% of reviews |
| Number of ratings | — | 89 — better |
| Update frequency | Monthly — better | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 436 MB |
| Age rating | 4+ | 9+ |
| Developer | J.Benito Pereira | XSGames |
Customer experience
NumChain
Odd Machines
Bugs and requests
NumChain
Not enough reviews yet to summarise bugs or requests.
Odd Machines
Reported bugs
9 issues- No stone to collect from 5th window
- Game closes immediately on 'play'
- Bug in first machine, stone disappears
- Cannot zoom on puzzle
- Cannot actuate dials
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- First line of clues/directions hidden by status bar on iPhone
- Hint button not intuitive
- No audio in levels, only main menu
- Bug on top of 4th machine, need to return to temple
Requested features
6 requests- Full game should be free
- Monocle usable at zoomed out level
- More visual feedback for puzzle completion
- Option to get the answer when hint isn't enough
- More levels/unlimited levels
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- Swap back button positions
In-app purchases
NumChain
- 25 Points$0.99
- 53 Points$1.99
- Ads Remove$2.99
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- 85 Points$2.99
- 110 Points$3.99
Odd Machines
- Full Game$3.99
- Unlock Full Game + Coffee$4.99
- Unlock Full Game + Love$7.99









