# The Challenge App vs FastenBuddy

The clearest difference is update cadence: FastenBuddy at every 5 days against The Challenge App's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. The Challenge App sells 4 in-app purchases, starting at $17.99 per month and FastenBuddy sells 4 in-app purchases, starting at $11.99 per month. Whichever you choose, the download price is not the number that matters.

The Challenge App ships an update every 2 weeks, FastenBuddy every 5 days. The most recent releases landed on October 14, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | The Challenge App | FastenBuddy |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 171 MB | 128 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Christian Curtius](https://appshunter.io/developer/1687476069) | [Nadine Thomainsky](https://appshunter.io/developer/1896707111) |

## What reviewers say

### The Challenge App

[App page](https://appshunter.io/ios/app/the-challenge-app/id6449030326)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mitgliedschaft für die App. | $17.99 | per month |
| Jährlich Mitgliedschaft für die App | $99.99 | per year |
| Shape Together - Men - Gym | $179.00 | one-time |
| Shape Together - Challenge | $179.00 | one-time |


### FastenBuddy

[App page](https://appshunter.io/ios/app/fastenbuddy/id6770002304)

This app acts as your personal fasting companion, offering various fasting methods, a smart timer, and a calorie tracker with AI meal recognition. It also includes a ketogenic scanner, a buddy system for finding fasting partners, and a collection of recipes. Premium features unlock meditations, step tracking, and an online course.

**Highlights:** Multiple fasting methods (16:8, 24h, ADF, etc.), Smart timer with live progress, AI-powered meal photo recognition, Ketogenic scanner with traffic light system, Buddy system for fasting partners, Recipe library and meal planning, Activity and calorie tracking

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fastenbuddy Pro Monatlich | $11.99 | per month |
| Fastenbuddy Pro Jährlich | $69.99 | per year |
| Fastenbuddy Premium | $8.99 | one-time |
| Fastenbuddy Pro Lifetime | $199.99 | one-time |


## Frequently asked questions

### Is The Challenge App free?

The Challenge App is free to download, with in-app purchases available.

### Is FastenBuddy free?

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

### Do The Challenge App or FastenBuddy have ads?

Neither The Challenge App nor FastenBuddy shows ads.

### Which is updated more often, The Challenge App or FastenBuddy?

The Challenge App ships an update every 2 weeks, and FastenBuddy every 5 days. Most recently, The Challenge App was updated on October 14, 2026 and FastenBuddy on October 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.*