# Plank vs OpenGS

The clearest difference is price: Plank at Free against OpenGS's $1.99. Plank also leads on iOS requirement (13.0 vs 17.0). OpenGS's advantage is update cadence (daily vs every 10 days). On ads, in-app purchases and device support there is nothing between them.

Plank is free to download; OpenGS costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Plank ships an update every 10 days, OpenGS daily. The most recent releases landed on October 11, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Plank | OpenGS |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/plank-core-and-challenge/id6462861500/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Daily** |
| Monetization | Free | — |
| Size | 22 MB | 36 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Zain Ali](https://appshunter.io/developer/1169007782) | [鉴 郗](https://appshunter.io/developer/559961494) |

## What reviewers say

### Plank

[App page](https://appshunter.io/ios/app/plank-core-and-challenge/id6462861500)

This app guides users through effective plank exercises and challenges to build core strength and improve posture. It offers customizable plans, audio guidance, and progress tracking to help users achieve their fitness goals.

**Highlights:** Effective plank workouts, Challenging fitness routines, Customizable workout plans, Variety of plank styles, Audio guidance during workouts, Detailed progress tracking, Integrated workout calendar

**Features:** macOS Compatibility

**In-app purchases:** none


### OpenGS

[App page](https://appshunter.io/ios/app/opengs/id6780107068)

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

**In-app purchases:** none


## Frequently asked questions

### Is Plank free?

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

### Is OpenGS free?

OpenGS costs $1.99, with no in-app purchases.

### Do Plank or OpenGS have ads?

Neither Plank nor OpenGS shows ads.

### Which is updated more often, Plank or OpenGS?

Plank ships an update every 10 days, and OpenGS daily. Most recently, Plank was updated on October 11, 2026 and OpenGS on October 15, 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.*