Comparison

memoryOS vs WoRD

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

Head to head
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

About

WoRD

This app uses the RSVP technique to help you read faster and understand more. It offers practice and challenge modes, adaptive speed control, and comprehension quizzes. Track your progress and enjoy a distraction-free reading experience.

Highlights
  • RSVP technique for faster reading
  • Practice and Challenge modes
  • Adaptive speed control up to 1000+ WPM
  • Smart comprehension testing
  • Multilingual content (English, Spanish, French)
  • Progress tracking and achievements
  • Offline functionality and no ads
Features
Read full description

Read faster. Understand more. Build a habit that sticks. WoRD is a speed-reading trainer that flashes one word at a time (RSVP) so your eyes stop wandering and your brain reads at its true speed. Train a few minutes a day and watch your words-per-minute climb. WHAT YOU CAN DO • Find Your Limit — a quick test reveals your real reading speed and level • Practice — RSVP training from 300 to 900+ WPM with a focal-point guide and Bionic mode • Challenges — read a story, then answer comprehension questions for a score • Reading Plans (Pro) — a personalized plan that schedules your sessions and ramps your target speed toward your goal, with no reading ever repeated • Track everything — reading level, speed trends, a consistency heatmap, personal records and comprehension by category STAY MOTIVATED • Daily streaks with automatic Streak Freeze protection • Achievements and badges to unlock • Home & Lock Screen widgets that keep your streak, plan and progress in view — tap to jump straight into practice • Share your results as beautiful cards made for Instagram & Facebook Stories A LIBRARY THAT GROWS WITH YOU Hundreds of original stories across science, history, technology, philosophy, nature, health and more — in English, Spanish, French and Portuguese. WoRD PRO Unlock Reading Plans, advanced stats and trends, 100+ exclusive premium stories, Pro training drills, and an ad-free experience. Available weekly, monthly or yearly. Download WoRD and start reading faster today. — Subscriptions auto-renew unless canceled at least 24 hours before the end of the current period. Payment is charged to your Apple ID account at confirmation of purchase. Manage or cancel anytime in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://website-ten-roan-20.vercel.app/#privacy

Screenshots

memoryOS4 screens
WoRD4 screens

Verdict

The call

The clearest difference is ads: memoryOS at none against WoRD's shown. memoryOS also leads on ratings volume (17K vs 10) and rating (4.9 vs 4.6). WoRD's advantage is monetization model (free vs free with in-app purchases) and review sentiment (100% vs 80%). On price, in-app purchases 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 23 in-app purchases, starting at $3.99 per 7 days and WoRD sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

memoryOS holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: memoryOS has 17K ratings behind it against 10, so its average is the more settled of the two. Written reviews complicate that: 80% of memoryOS's written reviews are positive against 100% of WoRD's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

memoryOS ships an update every 2 weeks, WoRD every 5 days. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

Scorecard8 real differences · 3 level
memoryOS versus WoRD: the parameters behind the verdict, then further details
ParametermemoryOSWoRD
PriceFreeFree
Rating4.9 (17K ratings) — better4.6 (10 ratings)
Positive reviews80.3% of reviews100.0% of reviews — better
Number of ratings17K — better10
Update frequencyEvery 2 weeksEvery 5 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
Best chart rank#63 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.2 — better18.0
Further details — not scored
Size231 MB21 MB
Age rating4+4+
DeveloperEncoder Inc.Alan Gloria

Customer experience

memoryOS

All ratings16,902 ratings
Positive97.2%
Neutral1.0%
Negative1.8%
Written reviews1,709 reviews
Positive80.3%
Neutral4.9%
Negative14.8%

WoRD

All ratings10 ratings
Positive90.0%
Neutral10.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and 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

WoRD

Not enough reviews yet to summarise bugs or requests.

In-app purchases

23 purchases

memoryOS

Subscriptions20
  • Student Weekly Plan$3.997 Days
  • Student Monthly Plan7 Days trial$5.991 Month
  • Expert Weekly Plan7 Days trial$6.997 Days
Show 17 more
  • Essential Weekly Plan7 Days trial$6.997 Days
  • Essential Monthly Plan7 Days trial$14.991 Month
  • Essential Monthly Plan2 variants$14.991 Month
  • Essential Monthly Plan$16.991 Month
  • Student 3 Months Plan$19.993 Months
  • Expert Monthly Plan$24.991 Month
  • Expert Monthly Plan$29.991 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 Plan1 Month trial$149.991 Year
  • Expert Annual Plan7 Days trial$174.991 Year
  • Expert Annual Plan1 Month trial$174.991 Year
One-time3
  • 10 Hearts$0.99
  • 10 Loci Coins$2.99
  • 50 Loci Coins$14.99
3 purchases

WoRD

Subscriptions3
  • WoRD Pro Weekly$3.997 Days
  • WoRD Pro Monthly$4.991 Month
  • WoRD Pro Yearly7 Days trial$39.991 Year

Questions

Is memoryOS free?
memoryOS is free to download, with in-app purchases available.
Is WoRD free?
WoRD is free to download, with in-app purchases available.
Which has better reviews, memoryOS or WoRD?
memoryOS is rated higher. memoryOS averages 4.9 out of 5 from 17K ratings, while WoRD averages 4.6 from 10 ratings.
Do memoryOS or WoRD have ads?
WoRD shows ads; memoryOS does not.
Which is updated more often, memoryOS or WoRD?
memoryOS ships an update every 2 weeks, and WoRD every 5 days. Most recently, memoryOS was updated on November 1, 2026 and WoRD on October 24, 2026.

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