# Pure Plank vs CastleFit

The clearest difference is rating: CastleFit at 4.0 against Pure Plank's 2.0. Pure Plank's advantage is ratings volume (46 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

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

CastleFit holds the better App Store score, 4.0 against 2.0. That said, the two scores are not equally well evidenced: Pure Plank has 46 ratings behind it against 2, so its average is the more settled of the two.

Pure Plank ships an update monthly, CastleFit every 2 weeks. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Pure Plank | CastleFit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (46 ratings)](https://appshunter.io/ios/app/pure-plank/id1613334264/reviews) | **[4.0 (2 ratings)](https://appshunter.io/ios/app/castlefit/id6786671032/reviews)** |
| Number of ratings | **46** | 2 |
| Positive reviews | 15.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 42 MB | 45 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Pure Plank LLC](https://appshunter.io/developer/1613334266) | [Castle Flexx](https://appshunter.io/developer/1695941246) |

## What reviewers say

### Pure Plank

[App page](https://appshunter.io/ios/app/pure-plank/id1613334264)

This app offers customizable planking routines for a full-core workout in as little as 3 minutes daily. It helps users set and achieve fitness goals, improve both mental and physical health, and makes core training engaging and fun.

**Highlights:** Customizable planking routines, Goal setting and tracking, Core strength improvement, Mental and physical health benefits, Engaging and fun workouts, Suitable for all fitness levels

**Features:** macOS Compatibility

**In-app purchases:** none


### CastleFit

[App page](https://appshunter.io/ios/app/castlefit/id6786671032)

This app offers guided stretching and mobility sessions to relieve pain, improve flexibility, and aid recovery. It provides routines for various needs, from injury recovery to pre-training warm-ups, all accessible at home.

**Highlights:** Guided stretch and mobility sessions, Targeted relief for specific body parts, HD instructional videos, Sessions organized by age, ability, and goals, Active and passive stretching routines, Device lineup browsing and purchasing

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

**In-app purchases:** none


## Frequently asked questions

### Is Pure Plank free?

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

### Is CastleFit free?

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

### Which has better reviews, Pure Plank or CastleFit?

CastleFit is rated higher. Pure Plank averages 2.0 out of 5 from 46 ratings, while CastleFit averages 4.0 from 2 ratings.

### Do Pure Plank or CastleFit have ads?

Neither Pure Plank nor CastleFit shows ads.

### Which is updated more often, Pure Plank or CastleFit?

Pure Plank ships an update monthly, and CastleFit every 2 weeks. Most recently, Pure Plank was updated on October 24, 2026 and CastleFit on October 22, 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.*