Summation vs GridMind Pro
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
GridMind Pro
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GridMind Pro – Math Puzzle Challenge your mind with GridMind Pro, the ultimate math puzzle experience. Fill the grid using arithmetic and logic — no guessing, no luck. Pure brain training. How to Play Place numbers in empty cells so that each row and column contains every number exactly once — just like Sudoku. The twist: cells are grouped into "cages," each with a target number and an arithmetic operation (+, −, ×, ÷). The numbers in each cage must produce the target value using the given operation. Simple rules, deep strategy. Three Difficulty Levels • Easy: Smaller 4×4 grids, perfect for getting started. • Medium: 6×6 grids — a satisfying challenge for regular players. • Hard: Large 9×9 grids with complex cage structures for true puzzle masters. Helpful Tools • Pencil Mode: Jot down candidate numbers in any cell and narrow down possibilities. • Hints: Stuck? Reveal the correct number for a selected cell. • Undo: Take back your last move without losing progress. • Error Check: Highlight mistakes and get back on track. Track Your Progress • View your solve count, best times, and average times for each difficulty level. • See your overall completion percentage across all puzzles. Sleek Design Full light and dark mode support with a clean, distraction-free grid layout designed for comfortable long play sessions. 2 Languages Supported English and Turkish. Completely Offline No internet connection needed. Play anytime, anywhere. Privacy Policy: https://www.urhoba.com/pages/privacy-policy-for-gridmind-pro Terms of Use: https://www.urhoba.com/pages/terms-of-use-for-gridmind-pro
Screenshots
Verdict
The clearest difference is in-app purchases: GridMind Pro at none against Summation's 2. Summation's advantage is ads (none vs shown) and device support (3 vs 1). On price and update cadence 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. GridMind Pro asks for nothing beyond the download.
Summation ships an update every 3 weeks, GridMind Pro fortnightly. The most recent releases landed on September 28, 2026 and September 15, 2026 respectively.
| Parameter | Summation | GridMind Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (58 ratings) — better | — |
| Positive reviews | 70.0% of reviews | — |
| Number of ratings | 58 — better | — |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 9.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 110 MB | 48 MB |
| Age rating | 4+ | 4+ |
| Developer | Lemon Jam Technology Co., Ltd. | Ahmet Bohur |
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
GridMind Pro
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Summation
- Buy Hints$0.99
- Remove Ads$1.99
GridMind Pro
No in-app purchases









