Comparison

Chemtrix vs Brain Exercise Games

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

Head to head
About

Chemtrix

A puzzle game where you build molecules by bonding atoms. Progress through levels, discover atomic secrets, and explore molecular structures. Features a free fall mode for continuous molecule building.

Highlights
  • Build molecules by bonding atoms
  • 24 challenging levels
  • Free fall mode for continuous play
  • Learn atomic bonding and molecular structures
  • Features Lewis-dot notation
  • Accurate energy calculations
Features
Read full description

Chemtrix is a fun arcade style puzzle game where your goal is to build molecules to progress through the game. There are 24 levels to work your way through, and on your journey you will discover the deepest secrets of the universe - how atoms bond and the structures and properties of the molecules they form. You can also play in 'free fall' mode, where new atoms drop continuously into the game board and your goal is to keep building molecules until you out of space. This is a fun game informed by real chemistry, the molecular structures you create and the way the atoms bond to each other are true to life. And extra features like lewis-dot notation and accurate energy calculations will delight discerning chemists.

About

Brain Exercise Games

Features
Read full description

Want a simple to play yet challenging minimalist puzzle game that will take a few minutes or hours? Then you are in the right game! 99 BOX is a puzzle game designed to both entertain and trains your brain. The concept of the game is quite simple; find the correct box on the first line each time and complete 99 levels. That's it! Please don't be fooled by what we say is easy. It may not be easy for everyone. ℹ Assigning numbers to the boxes on the hint screen can make them easier to remember. » Terms and Conditions: https://milowda.app/terms-and-conditions » Privacy Policy: https://milowda.app/privacy-policy

Screenshots

Chemtrix4 screens
Brain Exercise Games3 screens

Verdict

The call

The clearest difference is iOS requirement: Chemtrix at 13.0 against Brain Exercise Games's 15.6. On price, update cadence, ads and in-app purchases 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. Chemtrix sells 1 one-off in-app purchase and Brain Exercise Games sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Chemtrix ships an update weekly, Brain Exercise Games every 9 days. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

Scorecard1 real difference · 9 level
Chemtrix versus Brain Exercise Games: the parameters behind the verdict, then further details
ParameterChemtrixBrain Exercise Games
PriceFreeFree
Rating4.8 (95 ratings) — better—
Positive reviews52.1% of reviews—
Number of ratings95 — better—
Update frequencyWeekly — betterEvery 9 days
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size23 MB11 MB
Age rating4+4+
DeveloperSam WoolfEray Endes

Bugs and requests

Chemtrix

Reported bugs

11 issues
  • Cannot progress past level 8/9
  • In-app purchase prompt missing
  • Game crashes
  • Levels do not unlock after purchase
  • Atom spawner glitches
Show 6 more
  • Antimatter interaction issues
  • Game not scaling for larger screens
  • Level 16 impossible
  • Game freezes or lags
  • Molecule bonding issues
  • Game not saving progress

Requested features

12 requests
  • Add more elements and compounds
  • Include a sandbox mode
  • Add a time limit option for levels
  • Option to choose between naming structures or vice versa
  • Translate to more languages (Spanish, Polish, Vietnamese, etc.)
Show 7 more
  • Improve touch screen interface
  • Add more levels
  • Freeplay mode without antimatter
  • Introduce 3D molecule representations
  • Show formed molecules after game
  • Adjustable speed settings
  • Scale for bigger screens (iPhone)

Brain Exercise Games

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Chemtrix

One-time1
  • Unlock Chemtrix$0.99
1 purchases

Brain Exercise Games

One-time1
  • 99 Box Unlimited$3.99

Questions

Is Chemtrix free?
Chemtrix is free to download, with in-app purchases available.
Is Brain Exercise Games free?
Brain Exercise Games is free to download, with in-app purchases available.
Do Chemtrix or Brain Exercise Games have ads?
Neither Chemtrix nor Brain Exercise Games shows ads.
Which is updated more often, Chemtrix or Brain Exercise Games?
Chemtrix ships an update weekly, and Brain Exercise Games every 9 days. Most recently, Chemtrix was updated on November 2, 2026 and Brain Exercise Games on November 7, 2026.

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