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Idle Mastermind

Grumpy Rhino Games LTD · Games · Germany store
NOT IN TOP 100 HERE
View on App Store ↗ Instagram card Google Play version →
Revenue a month, worldwide
Too small to estimate
Not enough chart or ratings data
New ratings
Tracking
Daily counts start building from today
Rating
4.5 of 5
15 ratings in this store
Countries it ranks in
0
was 0 on Oct 17, 2026

Revenue

Estimated from the grossing charts of Oct 24, 2026 in the 53 countries we track, and ratings growth on the App Store.

EST. REVENUE / MONTH · WORLDWIDE
Unranked
Not in any grossing chart, and it sells nothing in the store (no in-app purchases, free download). Any revenue comes from ads or payments outside the store, which we can't see.
EST. LIFETIME DOWNLOADS
525 to 1.5K
Estimated from ratings count
RATINGS
15
AVG RATING
4.53
PRICE
Gratis
AGE
5.6y
LAST UPDATE
38d ago
VERSION
1.35
SIZE
286 MB
AGE RATING
12+

Last 30 days

From our daily snapshots of every grossing chart.

DAYS IN A GROSSING CHART
0 / 30
COUNTRIES NOW
0 (was 0)
EST. REVENUE FROM CHARTS, DAILY · BOTH STORES ONLY EST
Show daily values
Sep 25, 2026not in a grossing chart
Sep 26, 2026not in a grossing chart
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Sep 30, 2026not in a grossing chart
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Oct 6, 2026not in a grossing chart
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Oct 18, 2026not in a grossing chart
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Oct 23, 2026not in a grossing chart
Oct 24, 2026not in a grossing chart
Best rank Sep 25, 2026: not ranked. Now: not ranked. Days at zero are days outside every grossing chart.

Money and momentum

Measured from the store, not estimated.

WHAT IT CHARGES
No in-app purchases
Earns from its upfront price, ads or payments outside the store.
REVIEW MOMENTUM
0.1 reviews / week
  • Trendfalling
  • Recent reviews average3.4 stars
  • Recent 1 and 2 star share36%
From the latest 33 written reviews, covering 2034 days.
RELEASE CADENCE
1 update in 90 days
  • Typical gap between releases34 days
From the last 25 versions listed on the App Store.
RATING BREAKDOWN
15 ratings
5★67%
4★27%
3★0%
2★7%
1★0%

What users want

From the latest 33 reviews on the Germany App Store, Mar 30, 2021 to Sep 1, 2026: 36% are 1 or 2 stars. Open a theme to read what people wrote.

WHAT THEY COMPLAIN ABOUT · SHARE OF BAD REVIEWS
Price and subscription33%

4 of the 1 and 2 star reviews.

★★★★★ 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.
★★★★★ 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…
★★★★★ Great example of how money is ruining games.
Slow, laggy, battery33%

4 of the 1 and 2 star reviews.

★★★★★ But it's just painfully slow to make any progress.
★★★★★ 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.…
★★★★★ It was a little slow with not enough reward for starting and running your plan.
Crashes and freezes17%

2 of the 1 and 2 star reviews.

★★★★★ Kept bugging out and crashing
★★★★★ Keeps crashing at startup
Bugs, things not working17%

2 of the 1 and 2 star reviews.

★★★★★ Kept bugging out and crashing
WHAT THEY ASK FOR

No feature requests in the latest reviews.

WORDS THAT KEEP COMING UP IN BAD REVIEWS

Nothing stands out.

WHAT THEY LOVE · SHARE OF GOOD REVIEWS
Fun, addictive37%

7 of the 4 and 5 star reviews.

★★★★★ This game is simple and fun it has a easy afk play loop that you can pick up or put down any time.
★★★★★ 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.
★★★★★ Fun game that is a little short in content and a bit high in price.
Looks great11%

2 of the 4 and 5 star reviews.

★★★★★ Witty dialogue, unique characters, a fun aesthetic, etc.
★★★★★ The pixel art is beautiful, and combined with the sarcastic banter between characters really makes the world come alive.

Found by matching words and phrases in the reviews, not read by a person. A review can count toward more than one theme.

What users say

Latest reviews, Germany App Store.

★★★★★Sep 1, 2026
Buggy

Kept bugging out and crashing

★★★★★Aug 3, 2026
Works with no service!!!

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.

★★★★★Jul 1, 2025
Still fun, but not as amazing as their other titles

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.

★★★★★Apr 9, 2025
I want to like it

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.

★★★★★Feb 1, 2025
Great!

One of my favorite mobile games.

★★★★★Dec 24, 2024
Much better than average. Not amazing.

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.

Store screenshots

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App Store ads

Apple Search Ads this app ran in the last 90 days, from Apple's public ad repository.

No App Store ads in the EU
None in the last 90 days.

Apple only publishes ads shown in the EU (EU Digital Services Act), with a 7 day delay. An app that advertises only outside the EU shows nothing here.

Growth research

Where this app is buying and earning its users. Each link opens pre filtered.

ASO keywords

Most repeated terms in the listing. Highlighted ones also appear in the title.

evil5unique5lair4henchmen4idle4floors4build lair3raid city3makers idle3idle apocalypse3special floors3henchmen different3unique resource3resource management3build3hire3apocalypse3dastardly2raid2city2makers2plan2empire2resources2

What's new in 1.35

+ Large technical update.

Released Mar 30, 2021. Current version shipped Sep 16, 2026.

Store description

Ever wanted to be the villain? To build a lair? Hire henchmen? Fight superheroes? Concoct dastardly plans? Raid a city? Or… take over the world? No? What, really? Sure you do! Idle Mastermind, from the makers of Idle Apocalypse, is the best supervillain simulator of 2020! Play as three supervillains. The techy but tiny: Dr DOS. The gangster crime boss: Yara. Or the unpredictable: LOL. Each has their own evil grand plan. Build a lair to run your empire from. Hire a bunch of evil henchmen to do your bidding. Raid the city above to gain precious resources. Unlock new research and skills to improve your criminal, idle empire. When you’re ready, execute your evil plan and bring about the apocalypse! Play as 3 distinct villains, each with: + A unique lair with special floors and henchmen. + Different strategies, skills and stories. + Unique resource management styles. Build your dream lair: + 30 unique floors. + Floors that will generate resources while offline. + Special floors with unique gameplay elements. Hire an army of evil thugs: + 20+ henchmen. + Different classes, abilities. + Unique resource management gameplay. And more...! + Collect heaps of skins. + Complete events. + Join the Evil Eye Association. On top of that it has all the humour and inane chatter of a Grumpy Rhino game. The makers of Idle Apocalypse. Lovers of simulation games and incremental clickers won’t be able to put down this dastardly, near criminal RPG.

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Prices, ranks and reviews are per country. Revenue above is already worldwide.

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