# Summation

> Minimalistic math puzzle game for brain training and number rearrangement. (iPhone/iPad app by Lemon Jam Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/summation/id1219879009 (this page in markdown: same URL + `.md`)
- Developer: [Lemon Jam Technology Co., Ltd.](https://appshunter.io/developer/884737211)
- Category: Games, Education, Puzzle
- Price: Free with in-app purchases
- Rating: 4.20/5 from 58 App Store ratings · 110 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 110 MB
- Languages: American English, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2017-05-09
- Data updated: 2026-08-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/summation/id1219879009/reviews.md

## What is Summation?

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

## Key features

- Minimalistic math puzzle gameplay
- Rearrange numbers to solve puzzles
- Endless levels for infinite play
- Unlockable game themes
- Brain workout challenges

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Buy Hints | $0.99 | one-time |
| Remove Ads | $1.99 | one-time |


## What do users think of Summation?

Overall sentiment: mixed

**Pros**

- 🧠 Engaging puzzle mechanics with unique crossword-style addition gameplay
- 😌 Relaxing and calming experience without timers or move counters
- 🎨 Beautiful minimalist design with clean aesthetic
- 🎵 Pleasant soundtrack and sound design
- 📈 Good difficulty progression that challenges without frustrating
- ♾️ Extensive level count (100+ levels) with endless gameplay
- 📱 Works offline without requiring WiFi or cellular connection
- 🎮 Suitable for all ages and skill levels
- ⚡ Simple mechanics that are easy to learn
- 🏆 Intellectually stimulating and educational

**Cons**

- 📺 Excessive and intrusive full-screen video advertisements
- 💰 Ads persist even after paying for ad-free version
- 🔄 Ads interrupt gameplay and timer continues during Challenge Mode
- 🛑 Frequent app crashes and freezes, often related to ads
- 🔗 App Store opens unexpectedly multiple times during gameplay
- 🔇 Mute setting does not persist between sessions
- 📍 Banner ads sometimes misplaced or overlapping game content
- 🎯 Repetitive level design after level 30-100
- ⚙️ Game freezes when hint button is clicked
- 📱 Display issues on certain devices like iPhone X
- 🔄 Levels don't sync across devices despite Game Center integration
- ⏱️ Slow animation when transitioning between levels
- 🔁 Repeatedly prompts to purchase ad removal after every ad

**Commonly reported bugs**

- 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
- 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

**Most requested features**

- 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
- 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

## Recent user reviews (10 of 110)

All indexed reviews: https://appshunter.io/ios/app/summation/id1219879009/reviews.md

### 3/5 — Fix the hint “button”

*2021-07-26, version 1.2.1*

I liked this until the “free hint” button popped up…and froze the game. Closing the game and opening it didn’t help, nor did shutting down my device. I finally uninstalled and reinstalled it, losing all progress. I started again and after just a few levels, it’s back. 5 stars for an enjoyable game, 1 star for the bug.

### 1/5 — 為什麼？

*2020-04-21, version 1.2.1*

玩到102關 就當機 可以除理嗎？

### 4/5 — Nice form of Addition

*2020-04-09, version 1.2.1*

A simple game of addition with an almost crossword form.
Endless is your basic zen mode of playing and becoming familiar with the game.
Challenge and Timed is for having the added difficulty of beating the clock.
This game plays without WiFi.
The game doesn’t detect your default language, so if you want English you need to enter the game’s settings. You will know you’re in the right area when you see the list of other languages.
Either than that, this game is good.

### 3/5 — Great game but one issue

*2020-03-27, version 1.2.1*

The game overall is great but whenever the button to get more hints pops up it doesn’t let you click on it and you can’t exit that screen. I had to turn off my phone completely and turn it back on for me to exit the screen but I still couldn’t get more hints.

### 4/5 — Love It!

*2019-03-24, version 1.2.1*

I love the game and the ads even after I paid for no more ads was annoying but I found a way around it. For whom this may concern for whoever sees this. The game itself doesn’t need WiFi, cellular or anything to play, just go to settings and turn off “cellular” for this game, can’t give me random ads if ain’t no service going through the game 😏

### 1/5 — 解鎖去廣告挑戰模式出現無解關

*2019-01-14, version 1.2.1*

玩到一半發現有一關很明顯沒有辦法過關，請人吃廣告吃相太難看了

### 5/5 — Very entertaining

*2018-10-21, version 1.2.1*

Wish it would get updated more often.

### 1/5 — ads pop up even you purchased

*2018-10-18, version 1.2.1*

don’t buy anything here, they cheat you and lie.
just turn off your internet and enjoy the game without ads

### 2/5 — Fantastic puzzle- ad strategy a dealbreaker

*2018-06-27, version 1.2.1*

I love this game. I’ve had it for ages, the puzzle is unique, I have yet to see a copy of it which is saying a lot! It’s fun and makes you think. I love to come back to it every so often.

That said, the game slaps a full, 30 second long ad on you *every time* you leave the app. Got a text to respond to? 30 second ad. Close your phone to talk to someone? Another 30 seconds.

If an app is going to *penalize* me for having a life outside of it, it comes across as deeply inconsiderate to players... put ads between puzzles, give me a quick 5 second ad after returning to the app, but do not penalize me as the player for wanting to multitask. That’s pretty darn close to a full dealbreaker for me. It’s just bad design, plain and simple.

### 1/5 — Screen sizing

*2018-06-21, version 1.2.1*

The new update does not fit on the iPhone X properly.

## Frequently asked questions about Summation

### What is this app about?

This app is a minimalistic math puzzle game designed to provide a mental workout. The core gameplay involves rearranging given numbers to solve puzzles and progress through levels.

### What are the key features of this game?

Key features include minimalistic math puzzle gameplay, the ability to rearrange numbers to solve challenges, endless levels for continuous play, and unlockable game themes to customize your experience.

### Is this app free to download and play?

Yes, the app is free to download and play. It offers in-app purchases, which may provide additional content or customization options.

### What kind of challenges can I expect?

You can expect a variety of number rearrangement puzzles that will test your logical thinking and mathematical skills. The game offers endless levels, meaning you can play as long as you like, with increasing difficulty.

### Who is this app designed for?

This app is designed for anyone who enjoys puzzle games and wants to challenge their brain. It's particularly suited for players who appreciate minimalistic design and engaging logic-based gameplay.

## Version history (last 5 releases)

### 1.2.1 — 2018-04-28

This app has been updated by Apple to display the Apple Watch app icon.

Fix bugs

### 1.1.0 — 2017-06-16

-New Challenge Mode

### 1.0.3 — 2017-05-17

Fix bugs

### 1.0.1 — 2017-05-10

Fix bug

### 1.0.0 — 2017-05-09

No release notes.

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## More apps by Lemon Jam Technology Co., Ltd.

- [1 DOT](https://appshunter.io/ios/app/1-dot/id891598243)
- [TRIOO](https://appshunter.io/ios/app/trioo/id920336110)
- [Into Mirror](https://appshunter.io/ios/app/into-mirror/id1072600030)
- [OOOO by Lemon Jam](https://appshunter.io/ios/app/oooo-by-lemon-jam/id1129729280)
- [Miner Merge](https://appshunter.io/ios/app/miner-merge/id1377012044)

All apps by Lemon Jam Technology Co., Ltd.: https://appshunter.io/developer/884737211

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-10.*