Summation vs NumChain
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Summation
Engage your brain with a minimalistic math puzzle game. Rearrange numbers to solve increasingly challenging levels. Explore new themes and enjoy endless gameplay.
- Minimalistic math puzzle gameplay
- Rearrange numbers to solve puzzles
- Endless levels for infinite play
- Unlockable game themes
- Brain workout challenges
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Summation is a minimalistic math game that will give your brain a workout. The objective of the game is to solve the puzzle by rearranging the numbers given to you. Sound easy? But can you get to level 100? Features: - Endless Level. You can play forever. - Unlock new game themes. - New game modes coming. Get in touch: game@lemon-jam.com Twitter:twitter.com/lemonjamstudio Facebook:facebook.com/lemonjamstudio
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!
Screenshots
Verdict
The clearest difference is ads: Summation at none against NumChain's shown. Summation also leads on iOS requirement (9.0 vs 18.0). NumChain's advantage is review sentiment (100% vs 70%). On price, update cadence, in-app purchases and monetization model 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. Summation sells 2 one-off in-app purchases and NumChain sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Summation ships an update every 3 weeks, NumChain monthly. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.
| Parameter | Summation | NumChain |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (58 ratings) — better | — |
| Positive reviews | 70.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 58 — better | — |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 110 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Lemon Jam Technology Co., Ltd. | J.Benito Pereira |
Customer experience
Summation
NumChain
Bugs and requests
Summation
Reported bugs
12 issues- Hint button freezes game and requires reinstall to fix
- Game crashes at specific levels (e.g., level 102)
- App crashes immediately upon opening with blue dot indicator
- Full-screen ads cannot be closed and trap users
- Game gets stuck in landscape mode after full-page ad
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- Ads prevent progression in Challenge Mode
- App Store opens involuntarily multiple times in succession
- Mute setting resets every time app is opened
- Display not properly fitted for iPhone X
- Unsolvable levels in Challenge Mode after paying for ad removal
- Game Center leaderboards not accessible except after beating levels
- Next level button obscured by puzzle elements
Requested features
10 requests- Dark mode for nighttime playing
- Multiplication puzzle variant
- Increased difficulty progression beyond level 100
- More varied puzzle structures and mechanics
- Ability to purchase larger quantities of hints at once
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- Proper Game Center integration with friend additions
- Information about total number of levels available
- Night mode for bedtime gameplay
- Persistent mute setting across sessions
- Better level syncing across devices
NumChain
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Summation
- Buy Hints$0.99
- Remove Ads$1.99
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
