# Summation — user reviews > 110 indexed App Store user reviews of Summation by Lemon Jam Technology Co., Ltd., rated 4.20/5 from 58 ratings. - Source: https://appshunter.io/ios/app/summation/id1219879009/reviews - App overview in markdown: https://appshunter.io/ios/app/summation/id1219879009.md - Rating breakdown: 5★ 36 · 4★ 8 · 3★ 4 · 2★ 7 · 1★ 3 ## 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 ## Newest reviews (12 of 110) ### 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. ### 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 😏 ### 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. ### 3/5 — 挑戰模式第五關 *2018-04-30, version 1.2.1* 由第四關進到第五關，似乎沒有加秒數。 ### 2/5 — I can't play *2017-09-12, version 1.1.0* So I loved the game to death. I would play it all the time and now when I open it, it crashes and won't let me play anymore. It shows a blue dot then crashes immediately after. I deleted it and got it again, I've restarted my phone and nothing works. ### 4/5 — Fun Game *2017-09-05, version 1.1.0* Little difficulty progression Excessive ads ### 2/5 — Great game, but... *2017-08-25, version 1.1.0* I could do without the excessive ads. There are banner ads at the bottom. They're fine. Not annoying at all. But then there are full page video ads every few levels. And they aren't always skippable. Too much, devs. Too much. And the ads make it glitchy. There was a full page ad in landscape mode, and afterwards the game got stuck in landscape. I like this game quite a bit, but I'll be deleting it. ### 2/5 — Great game, however *2017-08-05, version 1.1.0* The app keeps switching to the app store each time i pass a level, and it does it CONTINUALLY. I dont want to restart the app every time this happens, because it doesnt always fix the problem. Devs need to stop being greedy with ads, its too much ### 4/5 — Almost Perfect *2017-07-08, version 1.1.0* Having to watch an ad after every 5 levels is fine, because I could pay to remove them if I wanted. What's actually more annoying is that the game asks me if I want to pay to remove ads after EVERY ad. I'm on level 500, so I've been asked 100 times if I want to remove the ads. How many times do I have to say no? ### 4/5 — enjoyable *2017-06-30, version 1.1.0* very fun, leaves me excited once i finish one level and start another ## Most critical reviews (10 lowest-rated) ### 1/5 — 為什麼？ *2020-04-21, version 1.2.1* 玩到102關 就當機 可以除理嗎？ ### 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 ### 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 ### 1/5 — Screen sizing *2018-06-21, version 1.2.1* The new update does not fit on the iPhone X properly. ### 1/5 — Extremely long ads which still display after paying *2018-05-03, version 1.2.1* This is a great game and very addictive, but it’s a shame that you have such long 30 seconds ads every few levels. I made an in app purchase to get rid of the ads, which they did for a little while, but now they’ve come back. Can you fix this please? ### 1/5 — 花錢就是不想有廣告結果還是彈出 這手法實在很惡劣 然後下方橫幅還是有廣告條很礙眼 *2018-01-25, version 1.1.0* 花錢就是不想有廣告結果還是彈出 這手法實在很惡劣 然後下方橫幅還是有廣告條很礙眼 ### 1/5 — Don’t not pay!!!! *2018-01-20, version 1.1.0* Even after you’ve decided to support the developer and pay for the app, it’s still full of advertising distractions. I tried the free game and decided to pay for the app. I was expecting to get the full game, but all I got was the removal of 1 banner ad. Each time you complete a level the still spam you with ads. ### 1/5 — Ad hogs screen. Can't play. *2017-08-26, version 1.1.0* Played for a minute, full screen ad with audio hogs the entire screen and cannot be closed. Unplayable. Needs a bug fix, I won't play a game that requires a force quit every minute. ### 1/5 — Still getting Ads *2017-06-14, version 1.0.3* After purchase. DON'T waste your money. ### 1/5 — Asks for reviews constantly *2017-06-01, version 1.0.3* Maybe it'll stop now ## Most praised reviews (10 highest-rated) ### 5/5 — Very entertaining *2018-10-21, version 1.2.1* Wish it would get updated more often. ### 5/5 — Inventive math puzzle game *2017-09-24, version 1.1.0* I've been playing this for months now. It reminds me a lot of Kakuro or Cross Sums (Dell) in that you have to figure out what combination of the given numbers will equal the sums. It's not easy. But it's not impossible. You can buy clues 10 clues for .99 or you can earn 3 clues by watching ads. Every once in a while you get a chance at 5 clues if you watch an ad. The ads aren't intrusive or constant. And I really love the developers for this. It's clear their not out to annoy the crap out of you for the sake of advertiser dollars. The ONLY thing I would like is the option to buy more clues at a time. This is a great calming activity. ### 5/5 — Game is so much fun! *2017-09-09, version 1.1.0* This game is so fun. ### 5/5 — Fun and challenging! *2017-08-31, version 1.1.0* The kids play with me and we flex our brain muscles. ### 5/5 — It is great *2017-08-28, version 1.1.0* Like.. very great Love it Bye ### 5/5 — My favorite new addiction! *2017-08-27, version 1.1.0* I love this game! It's super easy, yet challenging enough that it doesn't take me forever to move to the next level. There are very few apps that I will pay for to remove ads, but this is one of them. I love it! ### 5/5 — Great *2017-08-13, version 1.1.0* Great app ### 5/5 — Love it *2017-07-28, version 1.1.0* Great game ### 5/5 — I like it *2017-07-07, version 1.1.0* It's difficult without it being impossible. 👍🏻 ### 5/5 — Love it!! *2017-06-28, version 1.1.0* This game is addicting! 💕 --- *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.*