# Muscle Calculator vs Granula Synth

The clearest difference is rating: Muscle Calculator at 5.0 against Granula Synth's 1.8. Muscle Calculator also leads on in-app purchases (none vs 3) and update cadence (every 3 months vs every 25 months). Granula Synth's advantage is ads (none vs shown) and iOS requirement (12.0 vs 17.6). On price, ratings volume and device support there is nothing between them.

Both are free to download. Granula Synth sells 3 in-app purchases, starting at $2.99 per month. Muscle Calculator asks for nothing beyond the download.

Muscle Calculator holds the better App Store score, 5.0 against 1.8. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

Muscle Calculator ships an update every 3 months, Granula Synth every 25 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Muscle Calculator | Granula Synth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/muscle-calculator/id1576127895/reviews)** | [1.8 (4 ratings)](https://appshunter.io/ios/app/granula-synth/id1624549704/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 25 months |
| Monetization | **Ad-supported** | Freemium |
| Size | 7 MB | 75 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Vividly Technologies Inc.](https://appshunter.io/developer/1574999664) | [Stanislav Duplinskiy](https://appshunter.io/developer/1529735040) |

## What reviewers say

### Muscle Calculator

[App page](https://appshunter.io/ios/app/muscle-calculator/id1576127895)

This tool helps fitness enthusiasts calculate their Fat Free Mass Index (FFMI) and compare it to standard ranges. It requires basic body measurements like height, weight, and body fat percentage to provide personalized results.

**Highlights:** FFMI Calculation, BMI Calculation, FFMI Range Comparison, Input Height, Weight, Body Fat, Workout Enthusiast Tool

**Features:** macOS Compatibility

**In-app purchases:** none


### Granula Synth

[App page](https://appshunter.io/ios/app/granula-synth/id1624549704)

Explore new soundscapes by manipulating granular audio. This app offers a library of presets, custom sound import, and extensive parameter adjustments for unique music creation. Save your settings and share your sonic experiments.

**Highlights:** Granular sound manipulation, Preset library, Custom sound import, Parameter adjustment, Save user settings, Share audio recordings

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Access to app features | $2.99 | per month |
| Access to app features | $7.49 | per 3 months |
| Access to app features | $8.99 | per 6 months |


## Frequently asked questions

### Is Muscle Calculator free?

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

### Is Granula Synth free?

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

### Which has better reviews, Muscle Calculator or Granula Synth?

Muscle Calculator is rated higher. Muscle Calculator averages 5.0 out of 5 from 2 ratings, while Granula Synth averages 1.8 from 4 ratings.

### Do Muscle Calculator or Granula Synth have ads?

Muscle Calculator shows ads; Granula Synth does not.

### Which is updated more often, Muscle Calculator or Granula Synth?

Muscle Calculator ships an update every 3 months, and Granula Synth every 25 months. Most recently, Muscle Calculator was updated on November 3, 2026 and Granula Synth on November 3, 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.*