# memoryOS vs Umi

The clearest difference is ads: memoryOS at none against Umi's shown. memoryOS also leads on review sentiment (80% vs 54%) and ratings volume (16K vs 2.4K). Umi's advantage is update cadence (every 10 days vs every 3 weeks). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. memoryOS sells 20 in-app purchases, starting at $3.99 per 7 days and Umi sells 15 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for memoryOS against 4.8 for Umi. That said, the two scores are not equally well evidenced: memoryOS has 16K ratings behind it against 2.4K, so its average is the more settled of the two. Written reviews are what separate them: 80% of memoryOS's written reviews are positive against 54% of Umi's.

memoryOS ships an update every 3 weeks, Umi every 10 days. Both last shipped on September 30, 2026.

## The numbers

| Metric | memoryOS | Umi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (16K ratings)](https://appshunter.io/ios/app/memoryos-memory-games/id1553283646/reviews)** | [4.8 (2.4K ratings)](https://appshunter.io/ios/app/umi-language-learning/id1628381103/reviews) |
| Number of ratings | **16K** | 2.4K |
| Positive reviews | **80.4% of reviews** | 53.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#36** | #200 |
| Size | 248 MB | 79 MB |
| Requires iOS | 15.2 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Encoder Inc.](https://appshunter.io/developer/1524669695) | [Immersely Inc.](https://appshunter.io/developer/1628381105) |

## What reviewers say

### memoryOS

[App page](https://appshunter.io/ios/app/memoryos-memory-games/id1553283646)

**Currently charting:** #36 Top Grossing · Education, #117 Top Free · Education (US App Store)

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:** Vision Pro support

**In-app purchases (20)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Student Weekly Plan | $3.99 | per 7 days |
| Student Monthly Plan | $4.99 | per month |
| Expert Weekly Plan | $6.99 | per 7 days |
| Essential Weekly Plan | $6.99 | per 7 days |
| Essential Monthly Plan | $14.99 | per month |
| Essential Monthly Plan | $14.99 | per month |
| Student 3 Months Plan | $19.99 | per 3 months |
| Expert Monthly Plan | $24.99 | per month |
| Expert 3 Months Plan | $49.99 | per 3 months |
| Expert 3 Months Plan | $69.99 | per 3 months |
| Expert 6 Months Plan | $89.99 | per 6 months |
| Essential Annual Plan | $89.99 | per year |
| Essential Annual Plan | $89.99 | per year |
| Essential Annual Plan | $89.99 | per year |
| Expert Annual Plan | $148.99 | per year |
| Expert Annual Plan | $149.99 | per year |
| Expert Annual Plan | $149.99 | per year |
| 10 Hearts | $0.99 | one-time |
| 10 Loci Coins | $2.99 | one-time |
| 50 Loci Coins | $14.99 | one-time |

**What reviewers like**

- 🚀 Effective memory techniques
- 👍 Interactive and engaging
- 💡 Innovative use of memory palaces
- 🤩 Impressive results in a short time
- 🎉 Fun and enjoyable to use

**What reviewers complain about**

- 💰 Expensive subscription model
- 🐛 Buggy and crashes frequently
- 🤔 Confusing navigation and UI
- 🔒 Lack of transparency around pricing
- 🙄 Aggressive upselling and marketing tactics

**Reported bugs**

- 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**

- 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


### Umi

[App page](https://appshunter.io/ios/app/umi-language-learning/id1628381103)

**Currently charting:** #200 Top Grossing · Education (US App Store)

Master a new language through engaging TV clips, from beginner to fluent in a year. This app offers a fun, scientifically backed immersion method with vocabulary, listening, and reading practice. Learn from native speakers in real-life contexts without textbooks or lectures.

**Highlights:** Learn languages from 0 to fluency, Watch TV clips for learning, Vocabulary, listening, and reading practice, Immersion method, Learn from native speakers, 24 free lessons

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Umi Plus + Monthly | $12.99 | per month |
| Umi Plus - Monthly | $12.99 | per month |
| Umi Premium - Monthly | $14.99 | per month |
| Umi Pro - Monthly | $17.99 | per month |
| Umi Professional - Monthly | $19.99 | per month |
| Umi Plus - 6 months | $34.99 | per 6 months |
| Umi Plus + 6 Months | $34.99 | per 6 months |
| Umi Premium - 6 Months | $39.99 | per 6 months |
| Umi Plus + Annual | $49.99 | per year |
| Umi Plus - Annual | $49.99 | per year |
| Umi Pro - 6 months | $59.99 | per 6 months |
| Umi Premium - Annual | $59.99 | per year |
| Umi Pro - Annual | $69.99 | per year |
| Umi Professional - Annual | $79.99 | per year |
| Umi - Plus | $149.99 | one-time |

**What reviewers like**

- 🚀 Engaging and immersive learning experience
- 👍 Helpful for improving listening and comprehension
- 💡 Unique approach using real-world media clips
- 🤩 Fun and enjoyable way to learn vocabulary

**What reviewers complain about**

- 🐛 Inaccurate translations and subtitles
- 🐛 Inconsistent clip quality and content
- 💰 Paywall limits free access to full features
- 🤔 Lack of structured learning progression

**Reported bugs**

- Frequent app crashes and loading issues
- Inability to delete account or access full free version
- Inconsistent performance and playback problems

**Requested features**

- Add more language options like Mandarin and Russian
- Improve spaced repetition and word review system
- Provide more detailed grammar and conjugation explanations
- Add a search function to find specific vocabulary


## Frequently asked questions

### Is memoryOS free?

memoryOS is free to download, with in-app purchases available.

### Is Umi free?

Umi is free to download, with in-app purchases available.

### Which has better reviews, memoryOS or Umi?

memoryOS is rated higher. memoryOS averages 4.9 out of 5 from 16K ratings, while Umi averages 4.8 from 2.4K ratings.

### Do memoryOS or Umi have ads?

Umi shows ads; memoryOS does not.

### Which is updated more often, memoryOS or Umi?

memoryOS ships an update every 3 weeks, and Umi every 10 days. Most recently, memoryOS was updated on September 30, 2026 and Umi on September 30, 2026.

### Which is more popular, memoryOS or Umi?

memoryOS currently peaks at #36 in the App Store charts, and Umi at #200. Chart position reflects recent download velocity rather than total install base.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*