# Sostenutoo vs Microtonal Lab

The clearest difference is price: Sostenutoo at Free against Microtonal Lab's $6.99. Sostenutoo also leads on rating (5.0 vs 1.0) and update cadence (every 3 days vs every 2 months). Microtonal Lab's advantage is in-app purchases (none vs 2). On ratings volume, ads and device support there is nothing between them.

Sostenutoo is free to download; Microtonal Lab costs $6.99 up front. Sostenutoo sells 2 in-app purchases, starting at $14.99 per month. Microtonal Lab asks for nothing beyond the download.

Sostenutoo holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Sostenutoo ships an update every 3 days, Microtonal Lab every 2 months. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Sostenutoo | Microtonal Lab |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sostenutoo/id6756049284/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/microtonal-lab/id6786773427/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 26 MB | 90 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sostenutoo](https://appshunter.io/developer/1858187082) | [Martin Adler](https://appshunter.io/developer/1896354791) |

## What reviewers say

### Sostenutoo

[App page](https://appshunter.io/ios/app/sostenutoo/id6756049284)

This app centralizes all your orchestra's organizational needs, from rehearsals and sheet music to attendance tracking and event management. It provides a clear, secure space for musicians and conductors to manage multiple ensembles and prepare for performances.

**Highlights:** Centralized event management, Organized sheet music library, Attendance tracking, Musical program details, Multi-ensemble support, Secure data and privacy

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sostenutoo Monthly Subscription | $14.99 | per month |
| Sostenutoo Annual Subscription | $149.99 | per year |


### Microtonal Lab

[App page](https://appshunter.io/ios/app/microtonal-lab/id6786773427)

Explore music beyond the traditional 12-note scale with this comprehensive microtonal studio. Create custom scales, play a microtonal keyboard, sequence patterns, and perform live with a launchpad. Export your creations as MIDI files for further production.

**Highlights:** Harmonic Galaxy visualizer, Microtonal keyboard with custom scales, 32-step sequencer with FX, Launchpad for live performance, Extensive world scale library, Multiple tuning systems support, MIDI export for DAWs

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

**In-app purchases:** none


## Frequently asked questions

### Is Sostenutoo free?

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

### Is Microtonal Lab free?

Microtonal Lab costs $6.99, with no in-app purchases.

### Which has better reviews, Sostenutoo or Microtonal Lab?

Sostenutoo is rated higher. Sostenutoo averages 5.0 out of 5 from 1 ratings, while Microtonal Lab averages 1.0 from 1 ratings.

### Do Sostenutoo or Microtonal Lab have ads?

Neither Sostenutoo nor Microtonal Lab shows ads.

### Which is updated more often, Sostenutoo or Microtonal Lab?

Sostenutoo ships an update every 3 days, and Microtonal Lab every 2 months. Most recently, Sostenutoo was updated on October 30, 2026 and Microtonal Lab on October 28, 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.*