# Memory SoundX | Brain Training vs Fluid

The clearest difference is rating: Fluid at 5.0 against Memory SoundX | Brain Training's 4.0. Fluid also leads on update cadence (every 9 days vs every 3 weeks). Memory SoundX | Brain Training's advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, ratings volume, in-app purchases and device support there is nothing between them.

Both are free to download. Memory SoundX | Brain Training sells 3 in-app purchases, starting at $2.99 per month and Fluid sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Fluid holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Memory SoundX | Brain Training ships an update every 3 weeks, Fluid every 9 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Memory SoundX | Brain Training | Fluid |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/memory-soundx-brain-training/id979287610/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fluid-stretching-and-mobility/id6761041022/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 67 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Central Domains LLC](https://appshunter.io/developer/1896329345) | [To Minh Khoa Bui](https://appshunter.io/developer/1887466031) |

## What reviewers say

### Memory SoundX | Brain Training

[App page](https://appshunter.io/ios/app/memory-soundx-brain-training/id979287610)

This app offers a focused daily brain exercise by pairing distinct tones with vibrant colors. It engages auditory and visual memory to improve attention, recall, and cognitive resilience through a simple pattern repetition game.

**Highlights:** Auditory and visual memory training, Pattern recognition exercises, Daily cognitive challenges, Global leaderboards, No account required, Focus on attention and recall

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly. | $2.99 | per month |
| Pro Annual. | $14.99 | per year |
| Memory SoundX Pro — Lifetime. | $29.99 | one-time |


### Fluid

[App page](https://appshunter.io/ios/app/fluid-stretching-and-mobility/id6761041022)

This app offers personalized daily stretching routines to improve flexibility, reduce stiffness, and alleviate pain. It provides guided sessions for various needs, from morning energy to post-workout recovery, and allows users to create custom routines. Track your progress and build consistency with motivational features.

**Highlights:** Personalized stretch plans, Guided routines for any moment, Customizable routine builder, Streak tracking and milestone achievements, Smart scheduling and reminders, Fluid Score for progress tracking

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fluid Premium - Monthly | $9.99 | per month |
| Fluid Premium - Monthly | $12.99 | per month |
| Fluid Premium - Yearly | $49.99 | per year |


## Frequently asked questions

### Is Memory SoundX | Brain Training free?

Memory SoundX | Brain Training is free to download, with in-app purchases available.

### Is Fluid free?

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

### Which has better reviews, Memory SoundX | Brain Training or Fluid?

Fluid is rated higher. Memory SoundX | Brain Training averages 4.0 out of 5 from 2 ratings, while Fluid averages 5.0 from 1 ratings.

### Do Memory SoundX | Brain Training or Fluid have ads?

Fluid shows ads; Memory SoundX | Brain Training does not.

### Which is updated more often, Memory SoundX | Brain Training or Fluid?

Memory SoundX | Brain Training ships an update every 3 weeks, and Fluid every 9 days. Most recently, Memory SoundX | Brain Training was updated on November 1, 2026 and Fluid on October 31, 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.*