# KBody vs Assay

The clearest difference is update cadence: Assay at daily against KBody's every 3 months. KBody's advantage is iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. KBody sells 1 one-off in-app purchase and Assay sells 2 in-app purchases, starting at $16.99 per month. Whichever you choose, the download price is not the number that matters.

KBody ships an update every 3 months, Assay daily. The most recent releases landed on October 17, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | KBody | Assay |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Daily** |
| Size | 22 MB | 22 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [KBODY PERSONAL SPORT COMPANY](https://appshunter.io/developer/1795703808) | [Coded Matter FZ LLE](https://appshunter.io/developer/6787039059) |

## What reviewers say

### KBody

[App page](https://appshunter.io/ios/app/kbody/id6741807318)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Custom Workout & Meal Plans | $749.99 | one-time |


### Assay

[App page](https://appshunter.io/ios/app/assay-adaptive-training/id6804771050)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $16.99 | per month |
| Premium Annual | $89.99 | per year |


## Frequently asked questions

### Is KBody free?

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

### Is Assay free?

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

### Do KBody or Assay have ads?

Neither KBody nor Assay shows ads.

### Which is updated more often, KBody or Assay?

KBody ships an update every 3 months, and Assay daily. Most recently, KBody was updated on October 17, 2026 and Assay on October 1, 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.*