# memoryOS vs SWDI

The clearest difference is ads: memoryOS at none against SWDI's shown. memoryOS also leads on ratings volume (17K vs 13) and update cadence (fortnightly vs every 3 months). SWDI's advantage is review sentiment (100% vs 80%). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. memoryOS sells 9 in-app purchases, starting at $5.99 per month and SWDI sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

memoryOS holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: memoryOS has 17K ratings behind it against 13, 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 SWDI's, so the app with the better star average is not the one people write more warmly about.

memoryOS ships an update fortnightly, SWDI every 3 months. The most recent releases landed on November 11, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | memoryOS | SWDI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (17K ratings)](https://appshunter.io/ios/app/memoryos-memory-games/id1553283646/reviews)** | [4.7 (13 ratings)](https://appshunter.io/ios/app/swdi/id1607053920/reviews) |
| Number of ratings | **17K** | 13 |
| Positive reviews | 80.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#53** | — |
| Size | 232 MB | 118 MB |
| Requires iOS | 15.2 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Encoder Inc.](https://appshunter.io/developer/1524669695) | [Jens Frank](https://appshunter.io/developer/1607053922) |

## What reviewers say

### memoryOS

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

**Currently charting:** #53 Top Grossing · Education, #99 Top Free · Education (US App Store)

Enhance your memory with interactive lessons and a 3D virtual mind palace game. This app uses scientifically proven techniques like spaced repetition to boost long-term memory storage and knowledge retention. It's designed to make memorization skills joyful and effective for everyone.

**Highlights:** Interactive memory lessons, 3D Virtual Mind Palaces, Spaced repetition system, Gamified learning, Memorize names, lists, numbers, and more, Advanced study techniques

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Student Monthly Plan | $5.99 | per month |
| Essential Weekly Plan | $6.99 | per 7 days |
| Essential Monthly Plan | $15.99 | per month |
| Expert Monthly Plan | $27.99 | per month |
| Essential Annual Plan | $89.99 | per year |
| Expert Annual Plan | $148.99 | per year |
| Expert Annual Plan | $149.99 | per year |
| Expert Annual Plan | $159.99 | per year |
| Expert Annual Plan | $159.99 | per year |

**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


### SWDI

[App page](https://appshunter.io/ios/app/swdi/id1607053920)

Access personalized progression plans and track your development. Enjoy features like offline synchronization and progress monitoring. The app is free to download with optional one-time purchases for in-app content.

**Highlights:** Personalized progression plans, Progress tracking, Offline synchronization, One-time in-app purchases, Free download

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Obedience - Sit. | $45.00 | one-time |
| Basic directionals. | $45.00 | one-time |
| Down | $45.00 | one-time |
| Transport | $45.00 | one-time |
| Come to handlers side | $45.00 | one-time |
| Indication - Detection | $49.99 | one-time |
| Laser Directionals | $49.99 | one-time |
| Detection foundations | $54.99 | one-time |
| Tracking | $59.00 | one-time |
| Buried targets | $69.00 | one-time |


## Frequently asked questions

### Is memoryOS free?

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

### Is SWDI free?

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

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

memoryOS is rated higher. memoryOS averages 4.9 out of 5 from 17K ratings, while SWDI averages 4.7 from 13 ratings.

### Do memoryOS or SWDI have ads?

SWDI shows ads; memoryOS does not.

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

memoryOS ships an update fortnightly, and SWDI every 3 months. Most recently, memoryOS was updated on November 11, 2026 and SWDI on November 3, 2026.

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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.*