# KörperForce vs Flash

The clearest difference is rating: Flash at 5.0 against KörperForce's 4.0. Flash also leads on in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 6 weeks). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. KörperForce sells 1 in-app purchase, starting at $9.99 per month. Flash asks for nothing beyond the download.

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

KörperForce ships an update every 6 weeks, Flash every 2 weeks. The most recent releases landed on September 16, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | KörperForce | Flash |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/korperforce/id1516404931/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flashforward/id6759347148/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 24 MB | 25 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KorperForce, LLC](https://appshunter.io/developer/1438603036) | [Studio Foam](https://appshunter.io/developer/1878204170) |

## What reviewers say

### KörperForce

[App page](https://appshunter.io/ios/app/korperforce/id1516404931)

This app empowers personal trainers and athletes with metric-based coaching. It allows for tailored training plans, performance tracking to prevent injuries, and seamless workout management to help athletes achieve peak performance. Coaches can create custom metrics and manage unlimited athletes.

**Highlights:** Metric-based coaching, Customizable training plans, Performance tracking, Injury prevention focus, Remote coaching capabilities, Unlimited athlete management, Customizable metrics

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KF Pro Plan (Monthly) | $9.99 | per month |


### Flash

[App page](https://appshunter.io/ios/app/flashforward/id6759347148)

This app provides structure for climbers to plan and execute their gym training sessions. Build custom workouts from scratch or use pre-made templates, combining on-wall and off-wall exercises. Adjust your routine on the fly to match your daily performance.

**Highlights:** Build custom training sessions, Library of climbing-focused defaults, Mix on-wall and off-wall training, Broad exercise library (strength, calisthenics, flexibility), Precise set, rep, load, and rest time settings, Edit routines mid-session

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

**In-app purchases:** none


## Frequently asked questions

### Is KörperForce free?

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

### Is Flash free?

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

### Which has better reviews, KörperForce or Flash?

Flash is rated higher. KörperForce averages 4.0 out of 5 from 1 ratings, while Flash averages 5.0 from 1 ratings.

### Do KörperForce or Flash have ads?

Neither KörperForce nor Flash shows ads.

### Which is updated more often, KörperForce or Flash?

KörperForce ships an update every 6 weeks, and Flash every 2 weeks. Most recently, KörperForce was updated on September 16, 2026 and Flash on September 28, 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.*