Comparison

Chemyst vs Four Memory

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

Head to head
About

Chemyst

Experiment with basic elements to discover new compounds and molecules. Mix up to four elements, observe reactions, and unlock new discoveries. Hints are provided for non-reactive mixtures, and information about discovered elements is available.

Highlights
  • Mix up to four elements
  • Discover new compounds and molecules
  • Unlock new elements
  • View element information and Wikipedia pages
  • Receive hints for reactions
  • Leaderboards and achievements
Features
Read full description

Chemyst is a “mix-and-create”-style game where existing elements are mixed together to form new distinct elements. The difference is that here you can mix up to four elements, repeated or not, in a beaker at the bottom of the screen. If the items in the beaker react, you will see an explosion and new items will be formed! Start with mixtures of basic chemicals (carbon, hydrogen, oxygen, etc.) and discover new compounds and molecules. As you progress through the game, common everyday elements will appear! Use the silhouette of the items in the "LOCKED" list to get an idea of what these items are, and how they might be formed. For each successful reaction, the elements created will automatically move from the "LOCKED" to "UNLOCKED" list, from where they can be added to the mixing space with a double tap. You can see basic information about the discovered elements, as well as the Wikipedia page dedicated to each element. Also, when you successfully complete a reaction, you'll see a dashboard with information about the finished reaction and the products created. If you repeatedly make different non-reactive mixtures, the game will give you hints of possible reactions to be made with the elements already available. Includes Leaderboards and Achievements! New elements and reactions will be added for free in future updates, stay tuned!

About

Four Memory

This game offers an infinite memory training experience with four distinct difficulty levels. Players must recall and tap characters in the correct sequence as they appear. It's designed to be engaging for both children and adults.

Highlights
  • Infinite memory training
  • Four difficulty levels
  • Character sequence recall
  • Engaging for all ages
  • Simple tap controls
Features
Read full description

Trailer - https://youtu.be/QUxTFqxX0CE Four Memory is a game that trains your memory infinitely. There are four memory algorithms ranging from easy to advanced which go on forever meaning this game can be great for kids and adults. The characters will appear from the holes one by one, when they are revealed in the remembering part of the game, you must hit them in the same order as they were revealed. Easy - The characters will be in the same positions and can only appear once per round. Characters will also go down into their hole after being hit, leaving you with less options to worry about in that round. Medium - The characters will be in the same positions but can appear in the same round multiple times, each time you hit a character, all characters will go down and a new set will come back up before you need to hit the next character. Hard - The characters can switch positions so you need to remember the order of characters without being helped by their positioning. Each time you hit a character, all characters will go down and a new set will come back up before you need to hit the next character. Advanced - Characters can switch positions or they can not appear at all, in which case you must hit the character that has taken it's spot. If the character has moved to a different position, hit that character, if the character does not appear at all, hit the position it was in. Each time you hit a character, all characters will go down and a new set will come back up before you need to hit the next character.

Screenshots

Chemyst4 screens
Four Memory4 screens

Verdict

The call

The clearest difference is price: Chemyst at Free against Four Memory's $0.99. Four Memory's advantage is review sentiment (100% vs 70%) and update cadence (every 5 days vs every 3 weeks). On ads, in-app purchases, device support and iOS requirement 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

Chemyst is free to download; Four Memory costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Chemyst ships an update every 3 weeks, Four Memory every 5 days. The most recent releases landed on October 24, 2026 and June 10, 2026 respectively.

Scorecard4 real differences · 6 level
Chemyst versus Four Memory: the parameters behind the verdict, then further details
ParameterChemystFour Memory
PriceFree — better$0.99
Rating4.2 (131 ratings) — better—
Positive reviews70.0% of reviews100.0% of reviews — better
Number of ratings131 — better—
Update frequencyEvery 3 weeksEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better9.0
Further details — not scored
Size105 MB233 MB
Age rating4+4+
DeveloperDaniel MedeirosDreamstate Studios

Customer experience

Chemyst

All ratings130 ratings
Positive81.5%
Neutral3.8%
Negative14.6%
Written reviews10 reviews
Positive70.0%
Neutral0.0%
Negative30.0%

Four Memory

Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Chemyst

No in-app purchases

None

Four Memory

No in-app purchases

Questions

Is Chemyst free?
Chemyst is free to download, with no in-app purchases.
Is Four Memory free?
Four Memory costs $0.99, with no in-app purchases.
Do Chemyst or Four Memory have ads?
Neither Chemyst nor Four Memory shows ads.
Which is updated more often, Chemyst or Four Memory?
Chemyst ships an update every 3 weeks, and Four Memory every 5 days. Most recently, Chemyst was updated on October 24, 2026 and Four Memory on June 10, 2026.

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