# Katalyst vs HIT BLN | GYM

The clearest difference is update cadence: Katalyst at every 3 weeks against HIT BLN | GYM's every 3 months. 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 ships an update every 3 weeks, HIT BLN | GYM every 3 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Katalyst | HIT BLN | GYM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (59 ratings)](https://appshunter.io/ios/app/katalyst/id1558163458/reviews)** | — |
| Number of ratings | **59** | — |
| Positive reviews | 80.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 155 MB | 194 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Katalyst Interactive Inc.](https://appshunter.io/developer/1558163460) | [HIT BLN](https://appshunter.io/developer/1481555215) |

## 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


### HIT BLN | GYM

[App page](https://appshunter.io/ios/app/hit-bln-gym/id6736838110)

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

**In-app purchases:** none


## Frequently asked questions

### Is Katalyst free?

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

### Is HIT BLN | GYM free?

HIT BLN | GYM is free to download, with no in-app purchases.

### Do Katalyst or HIT BLN | GYM have ads?

Neither Katalyst nor HIT BLN | GYM shows ads.

### Which is updated more often, Katalyst or HIT BLN | GYM?

Katalyst ships an update every 3 weeks, and HIT BLN | GYM every 3 months. Most recently, Katalyst was updated on November 3, 2026 and HIT BLN | GYM on November 4, 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.*