# Castle Flexx vs Capillus

The clearest difference is rating: Castle Flexx at 3.0 against Capillus's 1.9. Capillus's advantage is ads (none vs shown) and update cadence (weekly vs monthly). On price, ratings volume, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Castle Flexx holds the better App Store score, 3.0 against 1.9. Both are backed by a comparable volume of ratings — 32 and 30 respectively. Written reviews complicate that: 19% of Castle Flexx's written reviews are positive against 27% of Capillus's, so the app with the better star average is not the one people write more warmly about.

Castle Flexx ships an update monthly, Capillus weekly. Both last shipped on September 21, 2026.

## The numbers

| Metric | Castle Flexx | Capillus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (32 ratings)](https://appshunter.io/ios/app/castle-flexx/id6450963146/reviews)** | [1.9 (30 ratings)](https://appshunter.io/ios/app/capillus/id6737130992/reviews) |
| Number of ratings | **32** | 30 |
| Positive reviews | 18.8% of reviews | **27.3% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Weekly** |
| Monetization | Ad-supported | **Free** |
| Size | 80 MB | 57 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Castle Flexx](https://appshunter.io/developer/1695941246) | [Capillus](https://appshunter.io/developer/1474718866) |

## What reviewers say

### Castle Flexx

[App page](https://appshunter.io/ios/app/castle-flexx/id6450963146)

This app offers a simple interface to shop for award-winning devices designed to alleviate chronic pain. It also provides a training section, FlexxLab, to help users manage conditions like plantar fasciitis, back pain, and hip pain.

**Highlights:** Shop for pain relief devices, FlexxLab training section, Addresses chronic pain issues, Supports iPhone and iPod, Designed for mobility

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

**In-app purchases:** none


### Capillus

[App page](https://appshunter.io/ios/app/capillus/id6737130992)

This app enhances your hair regrowth journey by integrating with a red light therapy cap. It offers tracking tools, Bluetooth connectivity, and progress photo capabilities to help you stay consistent and monitor your results.

**Highlights:** Bluetooth connectivity with therapy cap, Daily treatment tracking, Progress photo documentation, Customizable reminders, Hair care tips and support

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

**In-app purchases:** none


## Frequently asked questions

### Is Castle Flexx free?

Castle Flexx is free to download, with no in-app purchases.

### Is Capillus free?

Capillus is free to download, with no in-app purchases.

### Which has better reviews, Castle Flexx or Capillus?

Castle Flexx is rated higher. Castle Flexx averages 3.0 out of 5 from 32 ratings, while Capillus averages 1.9 from 30 ratings.

### Do Castle Flexx or Capillus have ads?

Castle Flexx shows ads; Capillus does not.

### Which is updated more often, Castle Flexx or Capillus?

Castle Flexx ships an update monthly, and Capillus weekly. Most recently, Castle Flexx was updated on September 21, 2026 and Capillus on September 21, 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.*