# Butterfly Challenge vs Kettlebell Functional Training

The clearest difference is in-app purchases: Butterfly Challenge at none against Kettlebell Functional Training's 8. Butterfly Challenge also leads on iOS requirement (13.0 vs 16.6). Kettlebell Functional Training's advantage is update cadence (every 2 months vs every 63 months) and rating (4.8 vs 4.6). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Kettlebell Functional Training sells 8 in-app purchases, starting at $19.99 per month. Butterfly Challenge asks for nothing beyond the download.

Kettlebell Functional Training holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 51 and 248 respectively. Written reviews point the same way: 67% of Butterfly Challenge's written reviews are positive against 71% of Kettlebell Functional Training's.

Butterfly Challenge ships an update every 63 months, Kettlebell Functional Training every 2 months. Both last shipped on October 16, 2026.

## The numbers

| Metric | Butterfly Challenge | Kettlebell Functional Training |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (51 ratings)](https://appshunter.io/ios/app/butterfly-challenge/id1429201714/reviews) | **[4.8 (248 ratings)](https://appshunter.io/ios/app/kettlebell-functional-training/id1603885876/reviews)** |
| Number of ratings | 51 | **248** |
| Positive reviews | 66.7% of reviews | **70.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 63 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 62 MB | 93 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [implicitli, LLC](https://appshunter.io/developer/1131851058) | [Adriell Mayes](https://appshunter.io/developer/1603885878) |

## What reviewers say

### Butterfly Challenge

[App page](https://appshunter.io/ios/app/butterfly-challenge/id1429201714)

This program offers a 14-day challenge designed to improve goalie flexibility with daily 10-minute sessions. It focuses on four key pillars of flexibility, providing a structured approach to enhance performance and reduce injury risk.

**Highlights:** 14-day structured program, Daily 10-minute sessions, Focus on 4 pillars of flexibility, Goalie-specific drills, Video tutorials

**Features:** macOS Compatibility

**In-app purchases:** none


### Kettlebell Functional Training

[App page](https://appshunter.io/ios/app/kettlebell-functional-training/id1603885876)

Achieve your fitness goals with custom workout programs designed for an integrated, balanced approach. This app focuses on varied exercises to prevent injuries and plateaus, maximizing your results and motivating you to move, look, and feel your best.

**Highlights:** Custom workout programs, Integrated, balanced approach, Exercise variety, Injury risk minimization, Plateau prevention, Motivation tools

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Memberships | $19.99 | per month |
| Single Kettlebell Program | $79.99 | one-time |
| Single-kettlebell Circuit | $79.99 | one-time |
| Mobility & Kettlebell Flows | $84.99 | one-time |
| Single Kettlebell Functional | $89.99 | one-time |
| Functional Muscle Building | $99.99 | one-time |
| Kettlebells & Bodyweight | $99.99 | one-time |
| Posterior Chain Strength | $99.99 | one-time |

**What reviewers like**

- 👍 Excellent kettlebell programs
- 👍 Inspiring and motivating workouts
- 👍 Great for building strength and muscle
- 👍 High-quality content
- 👍 Easy to follow lessons

**What reviewers complain about**

- 💰 Price is ridiculous
- 👎 No explanation of exercises
- 👎 No option to adjust repetitions
- 👎 Beginner course not beginner-friendly
- 👎 Some videos don't pop up

**Reported bugs**

- 🐛 Program week missing days
- 🐛 Some videos don't pop up
- 🐛 Videos not edited to show exact flow
- 🐛 In-app videos don't work for some plans

**Requested features**

- 💡 Ability to favorite exercises
- 💡 Input kettlebell weight and track progression
- 💡 Recommended beginner weights/tiers
- 💡 Recommended RPE per set
- 💡 Coaching cues for exercises


## Frequently asked questions

### Is Butterfly Challenge free?

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

### Is Kettlebell Functional Training free?

Kettlebell Functional Training is free to download, with in-app purchases available.

### Which has better reviews, Butterfly Challenge or Kettlebell Functional Training?

Kettlebell Functional Training is rated higher. Butterfly Challenge averages 4.6 out of 5 from 51 ratings, while Kettlebell Functional Training averages 4.8 from 248 ratings.

### Do Butterfly Challenge or Kettlebell Functional Training have ads?

Neither Butterfly Challenge nor Kettlebell Functional Training shows ads.

### Which is updated more often, Butterfly Challenge or Kettlebell Functional Training?

Butterfly Challenge ships an update every 63 months, and Kettlebell Functional Training every 2 months. Most recently, Butterfly Challenge was updated on October 16, 2026 and Kettlebell Functional Training on October 16, 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.*