# Idle Mastermind — user reviews > 52 indexed App Store user reviews of Idle Mastermind by Grumpy Rhino Games LTD, rated 4.60/5 from 439 ratings. - Source: https://appshunter.io/ios/app/idle-mastermind/id1488900054/reviews - App overview in markdown: https://appshunter.io/ios/app/idle-mastermind/id1488900054.md - Rating breakdown: 5★ 360 · 4★ 39 · 3★ 15 · 2★ 10 · 1★ 15 ## What do users think of Idle Mastermind? Overall sentiment: mixed **Pros** - 🎨 Beautiful pixel art and visual design - 😂 Witty humor and charming character dialogue - 🎮 Engaging idle game mechanics with good progression - ⏰ Balanced gameplay between idle and active play - 💰 Obtainable premium currency without spending money - 🔄 Prestige system that maintains long-term engagement - ✨ Unique characters and creative theme - 📱 No forced ads or non-intrusive monetization approach **Cons** - 🐌 Painfully slow progression and grinding - 💸 Aggressive monetization and expensive in-app purchases - 🔐 Content locked behind paywalls required for progression - 🔁 Repetitive prestige mechanic feels tedious - ⏳ Time-gated events requiring premium currency to participate - 📉 Limited content compared to developer's other games - 🎯 Early game bottlenecks and progression walls - 😑 Unfunny dialogue (subjective criticism from some users) **Commonly reported bugs** - Game crashes when Counterfeit character robs buildings - Random audio error producing persistent chopping/high-five sounds - Progress randomly deleted without explanation - Game crashes at startup after updates - Laboratory won't produce microchips, causing soft-lock - Ad boost offers not functioning - Graphics rendering issues on some iPhones - Mission quest exploit allowing infinite gem farming **Most requested features** - Increase progression speed by 20% - VIP program with spending-based rewards and stat bonuses - Skin texture overhaul with Sid's tower theme - More content and longer event durations - Better balance between free and paid progression paths - Additional activities in city and base areas ## Newest reviews (14 of 52) ### 4/5 — Still fun, but not as amazing as their other titles *2025-07-01* I still like it a lot, but the gameplay loop isn’t as satisfying and strategic as Necromerger and Idle Apocalypse. Also the art and things you unlock aren’t as interesting to me since I prefer monster-type characters. ### 4/5 — Much better than average. Not amazing. *2024-12-24* Witty humor, colorful art, which is something you’d better have for an idle game, since you will be seeing it constantly. Fun game that is a little short in content and a bit high in price. You can earn all currencies without spending money, but they expect you to spend valuable corruptinite to a large extent to even play the events. In NecroMerger, this companies other, better idle game, they are included in the game. They are timed to once per week, like in this, but do not cost you rare resources to participate in. I was staggered when I saw to reparticipate in the moon laser event, it would cost almost ten dollars in corruptinite. It was not nearly fun or valuable enough for me to even consider doing again. That is a preposterous misfire clearly designed to drain money. NecroMerger has a much fairer attitude. The seasonal and normal events are fun, rewarding, and free. Here, I feel much less generosity at play. Worth playing, but I would highly recommend not spending much money. You can get everything with enough time, and money invested does not give back enough for it, in my opinion. Also after a few weeks I seem to have maxed a lot of the building progression which is staggering considering how much better paced their other game is, which trickles content out over month and years. ### 4/5 — Man. *2024-08-18* When I got the 1 month achievement I checked if there were others of it and to all achievement hunters unless you wanna play this a whole year don’t play this other than that the games good ### 4/5 — Klass *2021-10-18* Очень понравилось скачал вчера а уже на 11 месте в Москве ### 4/5 — I miss Sid *2021-08-25* Love the game I would love a skin texture to overhaul the base and make it look like Sid’s tower with his cultists such a perfect game needs a perfect reference and or a shrine to remember this absolute unit ### 5/5 — Good game found bug. *2021-08-22* Very good game no forced adds I usually delete game after a week but have kept this one.it glitched when I tried to upgrade slug but would recommend. ### 5/5 — I encountered an audio error, please fix \/ *2021-08-14* So the game is fine and i love it to bits, but there’s an audio error that happens randomly and consistently for long periods of time when I play. And turning SFX and music off doesn’t fix it. It sounds like someone high-fiving or chopping rubber...like a wa-Poosh or ca-chunk. It doesn’t stop until I close the app and turn off my phone. It’s annoying and I can’t get it to stop. It persists after closing the game and opening other things, and it’s only happening with this game. Please fix it, I love this game and I wanna keep playing. Thank you. ### 4/5 — Idle mastermind *2021-08-13* The events aren’t long enough. Barely clear the halfway point. ### 5/5 — A glitch *2021-07-05* So when you have a quest to do to start missions you can start a mission cancel it and it still counts towards the total so you can just continuously do this to get gems ### 3/5 — Nice, but what? *2021-07-03* Hi I’ve been playing this for a week now and I came to play this great game because I’m just idling the art that art man drops and then all my progress was gone, I didn’t do anything and I was treating me like I had just downloaded and launched the game, so if you can, just please give back the hour’s I idled to get there and now it feels pointless to get to that point again but it’s still a fun game ### 4/5 — Don’t waste your money *2021-06-29* Yea do not spend anything here it would be a waste no matter what you would do other than this fact the game is somewhat enjoyable ### 2/5 — Nice but… *2021-06-28* I love most aspects of the game it’s pretty nice but you have nearly no chance to get the other characters without paying money it will take way too long… even some other progress it’s way to heavy… fix that I probably come back again ### 3/5 — Restarts & $$$ to advance makes this hard to play *2021-06-10* Got this game cause love Idle Apocalypse, and it is basically the same EXCEPT you HAVE to restart to advance AND tons of stuff you NEED unlocked to advance your lair relies on BUYING one of the other Masterminds (need LOL to get Skeleton keys unlocked for Dr. DOS). Having to restart to advance is bad enough, though annoying it’s still playable. Having to PURCHASE a character to advance just makes this more of a money grab than an actual fun game! ### 4/5 — Interesting. . . *2021-06-06, version 1.04* Are the developers self conscious of their height? ## Most critical reviews (10 lowest-rated) ### 1/5 — I want to like it *2025-04-09* Like their other game NecroMerger, there’s a lot to like: the pixel graphics are great, there’s a lot of whimsy, and it’s clearly a polished game. But it’s just painfully slow to make any progress. And this game (unlike NecroMerger) has a ‘prestige’ mechanic, so it’s painfully slow… over and over again in the exact same way. I’m not suggesting the game progress 1,000% faster, but maybe 20% faster. Fundamentally both games at their current pace are just boring. ### 1/5 — Scummy pricing and unfunny dialog *2022-12-24, version 1.28* Items in the game to unlock next tiers are priced so highly they’re trying to force people to buy in app purchases, sick of this scummy practice. The game itself is boring and the dialog is woefully unfunny. Don’t bother with this shovelware ### 1/5 — Too many paywalls *2021-12-18* Game seems cool in theory, but the time gating if you dont pay are ridiculous. You would probably have to play this game for thousands of hours in order to unlock what a pay pig will experience within a handful of hours. Great example of how money is ruining games. ### 1/5 — Progress randomly deleted? *2021-05-23, version 1.03* all of my progress was deleted for no apparent reason. ### 1/5 — So slow *2021-05-18, version 1.03* Paid $15 to get the three major upgrades which is a must to progress. Still have ads. Breaking point came when I find out the single repeating events have to be bought back into for a small fortune in game resources. Starts off awesome. Fails half way to good. TLDR: move on ### 1/5 — Softlocked or something? Idk *2021-05-03, version 1.01* laboratory won’t produce any micro chips and I can’t seem to unlock or upgrade anything else until I get them. Basically, the game doesn’t work. Not worth installing. ### 1/5 — Okay while it lasted *2021-04-22* I was enjoying the game until it became impossible to finish. At a certain point early in, you need x resource that is only stolen by y henchman. Y henchman can only be unlocked by crafting z room, which can only be unlocked by x resource. I didn’t mind it this far. It was a little slow with not enough reward for starting and running your plan. But it’s whatever. ### 2/5 — Crippled by microtransactions *2024-10-17* It will take you an inordinate amount of time to accumulate the resources needed to unlock the later villains needed for basic progression unless you spend way more money on the game than it’s worth. ### 2/5 — Seems decent *2022-01-10, version 1.11* Seems good but the graphics are very off-putting on my iPhone ### 2/5 — Good game lost behind incredibly steep paywall *2021-07-18* This game started off as being a really good idle game with a great idea. Sadly I very quickly realised just how much is stuck behind in app purchases that immediately halt progress. Multiple purchases are necessary just to progress past the beginning. Just for 2 characters and some resources it’s £48.99, and around £30 each to get enough resources to buy single characters. Then there’s also 2 playable master minds that are stuck behind paywalls that are needed just to get the certain skill points required just to progress through the beginning of the main skill tree. Would happily make reasonable purchases on games that deserve them, but this is just greedy. ## Most praised reviews (10 highest-rated) ### 5/5 — Works with no service!!! *2026-08-03* This game is simple and fun it has a easy afk play loop that you can pick up or put down any time. Also works without phone signal. ### 5/5 — Amazing idle game *2026-07-13, version 1.34* Probably have a few hundred hours in this one, love the progression and the themes ### 5/5 — Great! *2025-02-01* One of my favorite mobile games. ### 5/5 — Great game! *2024-08-16* Found a slight crashing issue though. I saved to buy Counterfeint early before most of the other henchmen and whenever she robbed a building, it crashed. I had to avoid the surface animations until I unlocked a crew with her, which stopped crashing. Wasn’t sure if this glitch was noticed, but it hasn’t caused any issue with the enjoyment of the game. ### 5/5 — Pretty Cool *2024-04-04, version 1.29* Pets pretty cool so things considered ### 5/5 — ad boosts might be broken *2023-06-13* they aren't working for me ### 5/5 — My favorite Idle Game *2022-02-27* This game is wonderful for a variety of reasons. Witty dialogue, unique characters, a fun aesthetic, etc. But the reason I call it my favorite idle game is because of the base mechanics. Most idle games to me start fun, get boring after a certain point, pick up again in the late game, and then taper out. This game gets rid of the middle trough, so I already feel like I’m in the late game, and even after playing for 8 months the fun hasn’t tapered off. By having resets that take you to other characters, you get to stay in the fun early game period while still making progress. Additionally, I haven’t spent a cent on this game. Yes, I watch adds sometimes but the game makes that entirely optional and the AdMan system makes sure I don’t overload myself on ads either. I can check in on the game throughout the day, and probably put in an hour or two a day, which is exactly what I want from an idle game. Cannot recommend enough ### 5/5 — . *2021-12-01* прикольная игра ### 5/5 — Арсений *2021-11-03* Игра просто пушка мне очень понравилась всем рекомендую ### 5/5 — Правы *2021-10-14* Классная игра👏👌 --- *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 2026-09-09.*