# FitKit App vs Challenger MK

The clearest difference is review sentiment: FitKit App at 100% against Challenger MK's 0%. FitKit App also leads on update cadence (every 8 days vs every 2 months). Challenger MK's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, in-app purchases and device support there is nothing between them.

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

FitKit App ships an update every 8 days, Challenger MK every 2 months. The most recent releases landed on September 4, 2026 and June 24, 2026 respectively.

## The numbers

| Metric | FitKit App | Challenger MK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (22 ratings)](https://appshunter.io/ios/app/fitkit-app/id1237334836/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 8 days** | Every 2 months |
| Monetization | Ad-supported | **Free** |
| Size | 142 MB | 19 MB |
| Requires iOS | 15.1 | **13.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fitkit International D.O.O.](https://appshunter.io/developer/1237334834) | [Grin It DOO](https://appshunter.io/developer/1500914276) |

## What reviewers say

### FitKit App

[App page](https://appshunter.io/ios/app/fitkit-app/id1237334836)

Access a comprehensive range of wellness services, including gyms, spas, nutritionists, and personal coaches. This app offers a convenient and flexible way to manage your physical and mental wellbeing, all in one place.

**Highlights:** Access to gyms and fitness studios, Book spa and massage appointments, Find nutritionists and psychologists, Connect with personal coaches, Manage wellbeing anytime, anywhere, Economical and flexible lifestyle options

**Features:** Apple Wallet

**In-app purchases:** none


### Challenger MK

[App page](https://appshunter.io/ios/app/challenger-mk/id1500914277)

This free mobile app rewards you for walking or running. Earn points for every kilometer to get discount codes from local businesses. Join a community focused on positive societal change and track your activities using Apple Health.

**Highlights:** Earn rewards for walking/running, Redeem points for local business discounts, Participate in challenges, Join a positive community, Integrates with Apple Health

**In-app purchases:** none


## Frequently asked questions

### Is FitKit App free?

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

### Is Challenger MK free?

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

### Do FitKit App or Challenger MK have ads?

FitKit App shows ads; Challenger MK does not.

### Which is updated more often, FitKit App or Challenger MK?

FitKit App ships an update every 8 days, and Challenger MK every 2 months. Most recently, FitKit App was updated on September 4, 2026 and Challenger MK on June 24, 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.*