Comparison

Mimir Mental Math Lite vs memoryOS

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

Head to head
About

Mimir Mental Math Lite

Enhance your mental arithmetic abilities by learning and practicing special calculation tricks. This app offers lessons on various techniques and a training mode to improve speed and problem-solving skills.

Highlights
  • Learn mental math tricks
  • Practice problem-solving
  • Method of complements
  • Multiplication tricks
  • Squaring numbers
  • Calculate weekdays
  • Two language support
Features
Read full description

Would you like to improve your mental math skills? Would you like to learn how to solve difficult math problems with ease and impress yourself and your friends with your math skills? With this app you will not only train your brain by solving math problems, you will also learn special mental math tricks. For many math problems, special tricks exist that make solving these much easier. It is important to know when to use which trick, but also how to solve a math problem if none of these special tricks can be used. This lite version contains 5 lessons where you will learn the following tricks: -Method of complements -Multiplication of numbers between 11 - 19 -Multiplication of numbers between 91 - 99 -Divisibility by 2, 5 and 10 -Squaring numbers ending with 5 -Squaring numbers between 50 to 59 -Calculate the weekday for any date In the second part of this app, the training, you can solve random math problems with increasing difficulty. The goal here is not only to become better and faster at solving math problems, you will also learn to detect which trick would be the best for the current math problem. This is why there is a help button in the training-section. If you push this button, the application will search for the trick or tip that is possibly the easiest for solving the current math problem. Additional features: -Two languages: All texts are in english and german. -Two different GUI-designs: Use a blue background with white text in sci-fi movie style. Or switch to a white background with black text.

About

memoryOS

Enhance your memory and focus with interactive lessons and a virtual mind palace game. Learn scientifically proven techniques to improve knowledge retention and recall a wide range of information, from names and numbers to complex data and entire books.

Highlights
  • Interactive bite-sized lessons
  • Virtual Mind Palaces game
  • Spaced repetition system
  • Scientifically proven techniques
  • Improve knowledge retention
  • Memorize diverse information
Features
Read full description

memoryOS contains interactive bite-sized lessons by a 2X World Memory Champion and an educational 3D game of Virtual Mind Palaces - all in one easy-to-use app. It utilizes scientifically proven memory techniques, spaced repetition and patented game mechanics to enhance long-term memory storage and improve knowledge retention. memoryOS is loved by 500,000+ people worldwide because it is a whole new, joyful & game-changing tool for obtaining the most effective memorization skills. Co-founded by Jonas von Essen, who went from struggling to remember to becoming a World Memory Champion, winning on Who Wants To Be a Millionaire, "Jeopardy, and setting a world record by memorizing 100,000 decimals of Pi . memoryOS app has over 18k public worldwide ratings on Apple and Google app stores combined, averaging 4.8 stars. Users also continue adding 5-star reviews daily, sharing how effective and life-changing memoryOS has been for them. Also, memoryOS remains the most crowdfunded app in Kickstarter’s history. Memorization is as important as reading and writing and should be taught as our base skill. Our mission is to enable millions of people to remember needed information easily. With memoryOS, you will learn how to memorize: - Names, Long speeches, Lists of items, Birthdays, Personal facts, Passwords, Trivia, Languages, Vocabulary and phrases, Countries and Capitals, Flags, Historical timeline, Numbers, Periodic table - Content of complete books, Dates of significant events, Complex data structures, Concepts, and figures - Art, Anatomy, Decks of cards, Advanced number systems; Long sequences of numbers, Binary Digits You will also learn: - How to keep track of years, months, weeks, and days - Advanced study techniques, Spaced Repetition system, Speed memorization Why did Google Brands Accelerator recognize memoryOS as being 'Light Years Ahead' in the memory space? • memoryOS delivers results: During our pre-launch phase, thousands of users completed our demo and, on average, had a 70% increase in recall and a 60% increase in recall speed just after the first ~40min session. • Providing your mind with structured storage space: We have spent tens of thousands of hours creating and optimizing our Virtual Mind Palaces, so you don’t have to spend months constructing your own the hard way. These virtual palaces serve as blueprints for your mind's storage space, allowing you to easily encode, store and recall like a memory champion. • A proven innovative approach that works: During our research and development stage, thousands of people of all age groups and even those with difficult medical conditions found memoryOS as an effective and useful tool. Actual results exceeded our team’s expectations. • Gamified edtech at its best: memoryOS has proven to work on people with no prior gaming experience - anyone can use it. Utilizing the power of the Unity game engine, memoryOS is widely accessible on all mobile and tablet devices and is soon coming to VR. -- Joining memoryOS is free. This provides extensive value on the free plan, and you are not obligated to pay to start using it. You can subscribe to a Student Premium plan for as low as $3.49/month when billed annually or $4.99/month when billed monthly (it can be 10-20% higher in some countries due to local taxes). You can subscribe through the 'Shop' section of the memoryOS app and find the above-mentioned or go to your App Store app's profile and choose a desired plan there. Recurring payments will automatically renew unless you cancel your account at least 24 hours before the end of the current subscription period. You can manage your subscription, cancel anytime, or turn off auto-renewal by accessing your iTunes account. Join the memoryOS community of over 500,000+ early adopters who share this memorable journey! -- Terms: memoryOS.com/terms Privacy policy: memoryOS.com/privacy-policy Learn more at: memoryOS.com Contact us: support@memoryOS.com

Screenshots

Mimir Mental Math Lite4 screens
memoryOS4 screens

Verdict

The call

The clearest difference is rating: memoryOS at 4.9 against Mimir Mental Math Lite's 3.0. memoryOS also leads on update cadence (every 3 weeks vs every 15 months) and ratings volume (16K vs 2). Mimir Mental Math Lite's advantage is in-app purchases (none vs 28) and review sentiment (92% vs 80%). On price, ads and device support 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. memoryOS sells 20 in-app purchases, starting at $3.99 per 7 days. Mimir Mental Math Lite asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

memoryOS holds the better App Store score, 4.9 against 3.0. That said, the two scores are not equally well evidenced: memoryOS has 16K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 92% of Mimir Mental Math Lite's written reviews are positive against 80% of memoryOS's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Mimir Mental Math Lite ships an update every 15 months, memoryOS every 3 weeks. The most recent releases landed on September 17, 2026 and September 28, 2026 respectively.

Scorecard8 real differences · 3 level
Mimir Mental Math Lite versus memoryOS: the parameters behind the verdict, then further details
ParameterMimir Mental Math LitememoryOS
PriceFreeFree
Rating3.0 (2 ratings)4.9 (16K ratings) — better
Positive reviews92.0% of reviews — better80.4% of reviews
Number of ratings216K — better
Update frequencyEvery 15 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank—#72 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better15.2
Further details — not scored
Size91 MB248 MB
Age rating4+4+
DeveloperSnarpEncoder Inc.

Customer experience

Mimir Mental Math Lite

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews25 reviews
Positive92.0%
Neutral4.0%
Negative4.0%

memoryOS

All ratings16,060 ratings
Positive97.2%
Neutral1.0%
Negative1.8%
Written reviews1,641 reviews
Positive80.4%
Neutral4.9%
Negative14.7%

Bugs and requests

Mimir Mental Math Lite

Not enough reviews yet to summarise bugs or requests.

memoryOS

Reported bugs

5 issues
  • Login issues and account management problems
  • Frequent crashes and app instability
  • Navigation and UI elements not working as expected
  • Syncing issues between devices and lost progress
  • Connectivity problems when using cellular data

Requested features

5 requests
  • More free content and lessons
  • Ability to create custom memory palaces
  • Better progress tracking and analytics
  • Integration with other learning/productivity apps
  • Offline mode for lessons and memory palaces

In-app purchases

None

Mimir Mental Math Lite

No in-app purchases

20 purchases

memoryOS

Subscriptions17
  • Student Weekly Plan$3.997 Days
  • Student Monthly Plan7 Days trial$4.991 Month
  • Expert Weekly Plan7 Days trial$6.997 Days
Show 14 more
  • Essential Weekly Plan7 Days trial$6.997 Days
  • Essential Monthly Plan3 variants$14.991 Month
  • Essential Monthly Plan7 Days trial$14.991 Month
  • Student 3 Months Plan$19.993 Months
  • Expert Monthly Plan2 variants$24.991 Month
  • Expert 3 Months Plan7 Days trial$49.993 Months
  • Expert 3 Months Plan$69.993 Months
  • Expert 6 Months Plan7 Days trial$89.996 Months
  • Essential Annual Plan1 Month trial$89.991 Year
  • Essential Annual Plan7 Days trial3 variants$89.991 Year
  • Essential Annual Plan14 Days trial$89.991 Year
  • Expert Annual Plan7 Days trial$148.991 Year
  • Expert Annual Plan7 Days trial$149.991 Year
  • Expert Annual Plan1 Month trial2 variants$149.991 Year
One-time3
  • 10 Hearts$0.99
  • 10 Loci Coins$2.99
  • 50 Loci Coins$14.99

Questions

Is Mimir Mental Math Lite free?
Mimir Mental Math Lite is free to download, with no in-app purchases.
Is memoryOS free?
memoryOS is free to download, with in-app purchases available.
Which has better reviews, Mimir Mental Math Lite or memoryOS?
memoryOS is rated higher. Mimir Mental Math Lite averages 3.0 out of 5 from 2 ratings, while memoryOS averages 4.9 from 16K ratings.
Do Mimir Mental Math Lite or memoryOS have ads?
Neither Mimir Mental Math Lite nor memoryOS shows ads.
Which is updated more often, Mimir Mental Math Lite or memoryOS?
Mimir Mental Math Lite ships an update every 15 months, and memoryOS every 3 weeks. Most recently, Mimir Mental Math Lite was updated on September 17, 2026 and memoryOS on September 28, 2026.

Other comparisons