# Katalyst vs BODY20

The clearest difference is review sentiment: Katalyst at 81% against BODY20's 0%. Katalyst also leads on rating (4.6 vs 2.0) and update cadence (every 3 weeks vs every 5 months). BODY20's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (11.0 vs 16.0). On price, ads, 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.

Katalyst holds the better App Store score, 4.6 against 2.0. That said, the two scores are not equally well evidenced: Katalyst has 58 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 81% of Katalyst's written reviews are positive against 0% of BODY20's.

Katalyst ships an update every 3 weeks, BODY20 every 5 months. The most recent releases landed on August 17, 2026 and July 8, 2026 respectively.

## The numbers

| Metric | Katalyst | BODY20 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (58 ratings)](https://appshunter.io/ios/app/katalyst/id1558163458/reviews)** | [2.0 (8 ratings)](https://appshunter.io/ios/app/body20/id6448731600/reviews) |
| Number of ratings | **58** | 8 |
| Positive reviews | **80.6% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 126 MB | 67 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Katalyst Interactive Inc.](https://appshunter.io/developer/1558163460) | [Body20 Global USA, LLC.](https://appshunter.io/developer/1481499512) |

## What reviewers say

### Katalyst

[App page](https://appshunter.io/ios/app/katalyst/id1558163458)

This app enhances a revolutionary workout system using Electro Muscle Stimulation (EMS) to engage all muscles simultaneously. It offers a full-body workout in just 20 minutes, with zero joint load. Access diverse workout programs and control intensity for personalized training.

**Highlights:** Electro Muscle Stimulation (EMS) training, Full-body engagement, 20-minute workouts, Zero joint load, Diverse workout library (strength, power, cardio, recovery), Adjustable impulse intensity, Offline workout access

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


### BODY20

[App page](https://appshunter.io/ios/app/body20/id6448731600)

Manage your fitness journey with this app. Book, cancel, or reschedule your training sessions. Stay informed about studio news and monitor your progress.

**Highlights:** Book, cancel, reschedule sessions, Track fitness results, Stay updated on studio news, Member information management

**In-app purchases:** none


## Frequently asked questions

### Is Katalyst free?

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

### Is BODY20 free?

BODY20 is free to download, with no in-app purchases.

### Which has better reviews, Katalyst or BODY20?

Katalyst is rated higher. Katalyst averages 4.6 out of 5 from 58 ratings, while BODY20 averages 2.0 from 8 ratings.

### Do Katalyst or BODY20 have ads?

Neither Katalyst nor BODY20 shows ads.

### Which is updated more often, Katalyst or BODY20?

Katalyst ships an update every 3 weeks, and BODY20 every 5 months. Most recently, Katalyst was updated on August 17, 2026 and BODY20 on July 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*