# memoryOS vs Spark

The clearest difference is ads: memoryOS at none against Spark's shown. memoryOS also leads on ratings volume (16K vs 2.7K) and chart position (#56 vs #173). Spark's advantage is update cadence (weekly vs every 3 weeks) and review sentiment (93% vs 80%). 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 Spark sells 10 in-app purchases, starting at $2.99 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 Spark. That said, the two scores are not equally well evidenced: memoryOS has 16K ratings behind it against 2.7K, 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 93% of Spark's.

memoryOS ships an update every 3 weeks, Spark weekly. Both last shipped on September 25, 2026.

## The numbers

| Metric | memoryOS | Spark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (16K ratings)](https://appshunter.io/ios/app/memoryos-memory-games/id1553283646/reviews)** | [4.8 (2.7K ratings)](https://appshunter.io/ios/app/spark-daily-learning-puzzles/id6744417372/reviews) |
| Number of ratings | **16K** | 2.7K |
| Positive reviews | 80.4% of reviews | **92.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#56** | #173 |
| Size | 248 MB | 145 MB |
| Requires iOS | **15.2** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Encoder Inc.](https://appshunter.io/developer/1524669695) | [The Mind Company](https://appshunter.io/developer/875063459) |

## What reviewers say

### memoryOS

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

**Currently charting:** #56 Top Grossing · Education, #123 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


### Spark

[App page](https://appshunter.io/ios/app/spark-daily-learning-puzzles/id6744417372)

**Currently charting:** #173 Top Grossing · Education, #197 Top Free · Education (US App Store)

Engage with daily learning puzzles centered around a single theme. Explore history, science, and pop culture through four unique, human-crafted games designed for discovery and fun.

**Highlights:** Daily themed puzzles, Four unique game modes, Human-crafted puzzles, Explore history, science, and pop culture, Archive of past puzzles, No timers or tests

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Spark Plus | $2.99 | per month |
| Spark Plus | $4.99 | per month |
| Spark+ | $9.99 | per month |
| Spark+ | $39.99 | per year |
| Spark Plus | $39.99 | per year |
| Spark Plus | $39.99 | per year |
| Spark Plus | $39.99 | per year |
| Spark+ | $59.99 | per year |
| Spark+ | $59.99 | per year |
| Spark+ | $79.99 | per year |

**What reviewers like**

- 🚀 Fun and free way to fight brainrot
- 👍 Engaging and educational puzzles
- 💡 Innovative and interesting themes
- 👍 Clean visuals and smooth design
- 👍 Balanced challenge and learning

**What reviewers complain about**

- 🐛 Potential inaccurate information in puzzles

**Reported bugs**

- AT&T blocking the website as potentially malicious

**Requested features**

- More games and puzzles
- Dark mode option


## Frequently asked questions

### Is memoryOS free?

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

### Is Spark free?

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

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

memoryOS is rated higher. memoryOS averages 4.9 out of 5 from 16K ratings, while Spark averages 4.8 from 2.7K ratings.

### Do memoryOS or Spark have ads?

Spark shows ads; memoryOS does not.

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

memoryOS ships an update every 3 weeks, and Spark weekly. Most recently, memoryOS was updated on September 25, 2026 and Spark on September 25, 2026.

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

memoryOS currently peaks at #56 in the App Store charts, and Spark at #173. 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.*