# KBuddy 9 vs Six

The clearest difference is in-app purchases: Six at none against KBuddy 9's 8. Six also leads on iOS requirement (13.0 vs 18.0). KBuddy 9's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. KBuddy 9 sells 8 in-app purchases, starting at $0.99 per 7 days. Six asks for nothing beyond the download.

KBuddy 9 ships an update every 3 weeks, Six every 2 months. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | KBuddy 9 | Six |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/kbuddy-9/id1630537751/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 92.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Freemium | — |
| Size | 79 MB | 109 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | **iPhone, iPad, Apple Watch, Vision Pro** | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Oleg Mueller](https://appshunter.io/developer/367875607) | [Universitaetsklinikum Wuerzburg](https://appshunter.io/developer/1519399355) |

## What reviewers say

### KBuddy 9

[App page](https://appshunter.io/ios/app/kbuddy-9/id1630537751)

This digital companion helps you manage and execute your Kieser Training plans. It offers precise timers, automatic weight adjustments, and progress tracking with detailed statistics and muscle overviews. Syncs across Apple devices and integrates with Apple Health.

**Highlights:** Unlimited training plan creation, Precise workout timer, Automatic weight adjustments, Detailed progress statistics, Apple Health integration, Live Activity on Lock Screen, Apple Watch app

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, iPhone Duo support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro - Weekly | $0.99 | per 7 days |
| Unlock Pro - Weekly - Family | $1.99 | per 7 days |
| Unlock Pro - Monthly | $1.99 | per month |
| Unlock Pro - Monthly - Family | $2.99 | per month |
| Unlock Pro - Yearly | $17.99 | per year |
| Unlock Pro - Yearly - Family | $24.99 | per year |
| Unlock Pro | $49.99 | one-time |
| Unlock Pro - Family | $89.99 | one-time |


### Six

[App page](https://appshunter.io/ios/app/six-minute-walk-test/id6480072769)

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

**In-app purchases:** none


## Frequently asked questions

### Is KBuddy 9 free?

KBuddy 9 is free to download, with in-app purchases available.

### Is Six free?

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

### Do KBuddy 9 or Six have ads?

Neither KBuddy 9 nor Six shows ads.

### Which is updated more often, KBuddy 9 or Six?

KBuddy 9 ships an update every 3 weeks, and Six every 2 months. Most recently, KBuddy 9 was updated on October 30, 2026 and Six on October 25, 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.*