# OPUS Connect vs The Muscle Engineers

The clearest difference is iOS requirement: OPUS Connect at 13.4 against The Muscle Engineers's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

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

OPUS Connect ships an update fortnightly, The Muscle Engineers every 9 days. The most recent releases landed on October 21, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | OPUS Connect | The Muscle Engineers |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (22 ratings)](https://appshunter.io/ios/app/opus-connect/id1661617364/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | 53.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 9 days** |
| Monetization | Free | — |
| Size | 115 MB | 53 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [OPUS Immersive, Inc](https://appshunter.io/developer/1638758805) | [ITyogistech L.L.C.](https://appshunter.io/developer/1718869617) |

## What reviewers say

### OPUS Connect

[App page](https://appshunter.io/ios/app/opus-connect/id1661617364)

Experience a symphony of wellness with sound and vibration for inner peace and emotional well-being. Customize your sessions with an evolving library of immersive soundscapes and controls.

**Highlights:** Personalized wellness sessions, Immersive soundscapes, SoundBed multi-sensory experience, Customizable frequency, sound, and vibration controls, Portable serenity, Evolving library with weekly updates

**Features:** macOS Compatibility

**In-app purchases:** none


### The Muscle Engineers

[App page](https://appshunter.io/ios/app/the-muscle-engineers/id6677018574)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OPUS Connect free?

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

### Is The Muscle Engineers free?

The Muscle Engineers is free to download, with no in-app purchases.

### Do OPUS Connect or The Muscle Engineers have ads?

Neither OPUS Connect nor The Muscle Engineers shows ads.

### Which is updated more often, OPUS Connect or The Muscle Engineers?

OPUS Connect ships an update fortnightly, and The Muscle Engineers every 9 days. Most recently, OPUS Connect was updated on October 21, 2026 and The Muscle Engineers on October 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.*