Comparison

Not Not vs Eureka

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Not Not

Engage your brain with a logic and orientation puzzle game. Swipe your character according to increasingly complex instructions to reach higher levels. Offers two addictive game modes for a satisfying challenge.

Highlights
  • Logic and orientation challenges
  • Swipe-based character control
  • Increasingly complex instructions
  • Classic game mode
  • Challenge game mode
  • Addictive gameplay
Features
Read full description

How much can your BRAIN handle? Not Not puzzle game is the ultimate brain-busting challenge based on logic and orientation. Follow the written instructions to swipe your character towards the correct direction (up, down, left or right) and victory. As you reach higher levels in the game, increasingly complex and varied instructions will require use of both your logic and dexterity for you to succeed. And sorry (not really) for any mental inconvenience this may cause :) Two game modes are available: - in the classic mode, discover a new concept on each level! - in the challenge mode, go as far as possible following more and more complex instructions! ***** "Amazing game!" "NotNot is a fun, challenging, and hilarious game. This will cheat your brain many times, so when you finally finish a level, it's super satisfying. It consists of short levels (sometimes) and its very addicting." _by HKapples_ ***** "This game is epic" "This game is epic. The graphics are great, the game is enjoyable and it a brilliant game. It is quite challenging but is still realy fun. You just got to have good reactions." ---------------- _by a notnot reviewer_ ***** "Creative new mind bending game!" "Give it a try, something different." ---------------- _by JTonzo_

About

Eureka

This app offers over 50 mini-games designed to test and improve various cognitive skills like logic, memory, creativity, and focus. It provides a fun and challenging way to stimulate your brain and see if you can outsmart others.

Highlights
  • Over 50 mini-games
  • Tests logic, memory, creativity, speed
  • Improves focus and brain skills
  • Diverse and unique puzzles
  • Addictive brain challenge
Features
Read full description

If you think you are smart, think twice! Eureka is the right brain game to tell if you are a real genius! Featuring more than 50 mini-games to challenge your brain skills (logic, memory, creativity, speed, reflex, focus, etc.), Eureka is the addictive brain challenge your brain needs to go from dumb to genius. Are you up to the challenge? Eureka is full of brainteasers and fun mini-games that you can enjoy forever. Each brain game will be different from the previous, so you can enjoy original, creative and unique puzzles specifically designed to push your brain limits! Are you smarter than your friends are? Do you think outside the box? Can you pass more than 50 different brainy tricky mini-games? Eureka is the brain challenge you need! GAME FEATURES: • Diverse gameplay to keep your brain activated for hours • Each level is a different brain game • Simple to learn and easy to understand • Fun yet challenging brain challenge • Improve your focus and brain skills with diverse mini-games Accept the brain challenge and prove you have a creative mind! Infinity Games aims to provide the best game experience within its titles. We love showcasing new minimalist puzzle games and making people think while relaxing. Do you like our work? Connect below: Facebook: https://www.facebook.com/infinitygamespage Instagram: 8infinitygames (https://www.instagram.com/8infinitygames/)

Screenshots

Not Not4 screens
Eureka4 screens

Verdict

The call

The clearest difference is update cadence: Not Not at every 2 weeks against Eureka's every 4 weeks. Eureka's advantage is iOS requirement (12.0 vs 15.0). On price, rating, review sentiment and ratings volume 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Not Not sells 8 one-off in-app purchases and Eureka sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Not Not against 4.7 for Eureka. Both are backed by a comparable volume of ratings — 1.1K and 513 respectively. Written reviews are what separate them: 78% of Not Not's written reviews are positive against 77% of Eureka's.

UpkeepUpdate frequency

Not Not ships an update every 2 weeks, Eureka every 4 weeks. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Not Not versus Eureka: the parameters behind the verdict, then further details
ParameterNot NotEureka
PriceFreeFree
Rating4.7 (1.1K ratings) — better4.7 (513 ratings)
Positive reviews78.4% of reviews — better76.9% of reviews
Number of ratings1.1K — better513
Update frequencyEvery 2 weeks — betterEvery 4 weeks
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size75 MB140 MB
Age rating17+4+
DeveloperAlternative ShiftINFINITY GAMES, LDA

Customer experience

Not Not

All ratings1,049 ratings
Positive93.3%
Neutral3.5%
Negative3.1%
Written reviews776 reviews
Positive78.4%
Neutral5.4%
Negative16.2%

Eureka

All ratings510 ratings
Positive91.6%
Neutral6.7%
Negative1.8%
Written reviews13 reviews
Positive76.9%
Neutral0.0%
Negative23.1%

User reviews

Not Not

From 1.1K App Store ratings

What we love

  • 🧠 Challenges the brain
  • 🕹 Engaging and addictive gameplay
  • 🕰 Good time-killer
  • 👍 Simple yet effective game mechanics

Room to improve

  • 📺 Excessive ads and monetization
  • 🐛 Bugs and technical issues
  • 🔄 Language settings reset after each session
  • 🔍 Difficulty progression can be uneven

Eureka

From 513 App Store ratings

What we love

  • 🤩 Fun and engaging gameplay
  • 🧠 Challenges the mind
  • 👍 Kid-friendly
  • 😍 Addictive and immersive
  • 💯 Great for cognitive exercise

Room to improve

  • anúncios Ads are intrusive
  • 🗑️ Paid version still has ads
  • 🧩 Lacks variety in puzzles

Bugs and requests

Not Not

Reported bugs

3 issues
  • Game freezes on startup
  • Purchased ad removal not working
  • Inconsistent swipe/input detection

Requested features

3 requests
  • More levels and game modes
  • Option to disable music/sound effects
  • Improved accessibility for color-blind players

Eureka

Reported bugs

2 issues
  • Ads after every level
  • Paid version with ads

In-app purchases

8 purchases

Not Not

One-time8
  • No Ads$0.99
  • Unlock World : The Liar$0.99
  • Emergency Kit$0.99
Show 5 more
  • First Aid Kit2 variants$0.99
  • Survival Kit2 variants$2.99
  • Complete Kit$4.99
  • Immortal Kit$9.99
  • Ultimate Kit$29.99
1 purchases

Eureka

One-time1
  • Remove Ads$1.99

Questions

Is Not Not free?
Not Not is free to download, with in-app purchases available.
Is Eureka free?
Eureka is free to download, with in-app purchases available.
Which has better reviews, Not Not or Eureka?
Not Not is rated higher. Not Not averages 4.7 out of 5 from 1.1K ratings, while Eureka averages 4.7 from 513 ratings.
Do Not Not or Eureka have ads?
Both Not Not and Eureka show ads.
Which is updated more often, Not Not or Eureka?
Not Not ships an update every 2 weeks, and Eureka every 4 weeks. Most recently, Not Not was updated on October 23, 2026 and Eureka on October 25, 2026.

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