Reviews indicate memoryOS effectively teaches mnemonic techniques that users find useful, with engaging lessons and practical applications. However, high subscription costs, billing issues, clunky 3D navigation, and technical glitches are frequent complaints. It suits learners and gamers but may deter budget-conscious or non-tech-savvy users.
What users like
Effective memory techniques Users report success with memory palaces and spaced repetition for lists and facts.
Engaging and fun learning Gamified format and visual palaces maintain motivation and daily practice.
Clear instruction Lessons are well-paced and easy to follow, even for beginners.
Practical application Techniques help with exams, names, and work performance.
Common concerns
High subscription cost Annual fees often over $100, monthly plan seen as expensive for value.
Misleading trial and billing Unexpected charges after trial and difficulty cancelling subscriptions reported.
Confusing navigation 3D palace controls are unintuitive, especially for non-gamers and older users.
Technical glitches Freezing, slow loading, and crashes interrupt the learning experience.
Based on 428 Google Play reviews · Updated Aug 30, 2026
Over the last 60 days, PixelTrack observed changes in estimated installs, rating, rating count and review count. The table compares the earliest recorded changed value with the latest observation.
Metric
Earlier value
Latest value
Change
Latest change
Estimated installs
403,973
412,343
+8,370
Oct 4, 2026
Rating
4.82
4.82
+0.01
Oct 3, 2026
Rating count
12,854
13,245
+391
Oct 4, 2026
Review count
1,103
1,127
+24
Oct 3, 2026
memoryOS: Improve Your Memory Changelog
4 changes
↑
Version 1.6.0 Update
What’s new
Thank you for your continued feedback! We are dedicated to making mOS the best experience possible for you. In this update we've focused on user experience and performance:
Smoother Palaces
Fixed freezing issues while exploring 3D Palaces.
Full Video Transcript
We’ve added a full transcript to every video.
Refreshed Pre & Post-test Experience
Updated completion screens and Result Comparison to highlight your progress.
Under the Hood
We've fixed several bugs and improved app stability.
$
In-app purchase price changed
In-app purchase price: $0.99 - $149.99 per item → $0.99 - $174.99 per item
↑
Version 1.5.9 Update
What’s new
Thank you for your continued feedback! We are dedicated to making mOS the best experience possible for you. In this update, we've focused on user experience and performance:
Better Onboarding
We've refined the app onboarding flow to get you up and running faster and more smoothly than ever.
Under the Hood
We've fixed several bugs and improved overall app stability for a smoother experience.
↑
Version 1.5.8 Update
What’s new
Thank you for your continued feedback! We are dedicated to making mOS the best experience possible for you. In this update we've focused on user experience and performance:
Fresh New Look
We've refreshed the Sign In screen and the onboarding survey for a cleaner, more polished experience.
Improved Palace Onboarding
We've updated Palace Onboarding slightly to create a smoother learning flow.
Under the Hood
We've fixed several bugs and improved overall app stability for a smoother experience.
