# OI Solutions vs memoryOS

The clearest difference is in-app purchases: OI Solutions at none against memoryOS's 28. OI Solutions also leads on iOS requirement (13.0 vs 15.2). memoryOS's advantage is update cadence (every 2 weeks vs every 51 months) and ratings volume (17K vs 1). On price, rating, ads and device support there is nothing between them.

Both are free to download. memoryOS sells 23 in-app purchases, starting at $3.99 per 7 days. OI Solutions asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for OI Solutions against 4.9 for memoryOS. That said, the two scores are not equally well evidenced: memoryOS has 17K ratings behind it against 1, so its average is the more settled of the two.

OI Solutions ships an update every 51 months, memoryOS every 2 weeks. The most recent releases landed on October 7, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | OI Solutions | memoryOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/oi-solutions/id1367953288/reviews)** | [4.9 (17K ratings)](https://appshunter.io/ios/app/memoryos-memory-games/id1553283646/reviews) |
| Number of ratings | 1 | **17K** |
| Positive reviews | — | 80.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 51 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#66** |
| Size | 5 MB | 231 MB |
| Requires iOS | **13.0** | 15.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Abintegro](https://appshunter.io/developer/1278333681) | [Encoder Inc.](https://appshunter.io/developer/1524669695) |

## What reviewers say

### OI Solutions

[App page](https://appshunter.io/ios/app/oi-solutions/id1367953288)

Access career development tools and e-learning resources on the go. Prepare for interviews, build your resume, and search for jobs with expert advice. Syncs with your existing account for seamless career management.

**Highlights:** Career assessments, Interview simulator, Resume builder, Job search engine, Global recruiter database, Expert career advice, E-learning courses

**In-app purchases:** none


### memoryOS

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

**Currently charting:** #66 Top Grossing · Education, #105 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 (23)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Student Weekly Plan | $3.99 | per 7 days |
| Student Monthly Plan | $5.99 | 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 |
| Essential Monthly Plan | $16.99 | per month |
| Student 3 Months Plan | $19.99 | per 3 months |
| Expert Monthly Plan | $24.99 | per month |
| Expert Monthly Plan | $29.99 | 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 | $174.99 | per year |
| Expert Annual Plan | $174.99 | 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


## Frequently asked questions

### Is OI Solutions free?

OI Solutions 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, OI Solutions or memoryOS?

OI Solutions is rated higher. OI Solutions averages 5.0 out of 5 from 1 ratings, while memoryOS averages 4.9 from 17K ratings.

### Do OI Solutions or memoryOS have ads?

Neither OI Solutions nor memoryOS shows ads.

### Which is updated more often, OI Solutions or memoryOS?

OI Solutions ships an update every 51 months, and memoryOS every 2 weeks. Most recently, OI Solutions was updated on October 7, 2026 and memoryOS on October 26, 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.*