# ScaleGen vs Tapko Harmony

The clearest difference is price: ScaleGen at $3.99 against Tapko Harmony's $19.99. ScaleGen also leads on iOS requirement (10.0 vs 16.0). Tapko Harmony's advantage is update cadence (every 4 days vs every 29 months) and chart position (#185 vs unranked). On ads, in-app purchases and device support there is nothing between them.

ScaleGen costs $3.99 and Tapko Harmony $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ScaleGen ships an update every 29 months, Tapko Harmony every 4 days. The most recent releases landed on November 13, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | ScaleGen | Tapko Harmony |
| --- | --- | --- |
| Price | **$3.99** | $19.99 |
| Rating | **[4.7 (12 ratings)](https://appshunter.io/ios/app/scalegen/id908056629/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 70.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 4 days** |
| Monetization | Paid | — |
| Best chart rank | — | **#185** |
| Size | 14 MB | 2 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Gestrument AB](https://appshunter.io/developer/576235485) | [David Lars Guva](https://appshunter.io/developer/1887879459) |

## What reviewers say

### ScaleGen

[App page](https://appshunter.io/ios/app/scalegen/id908056629)

Generate and edit musical scales with intricate detail. Explore traditional and experimental tunings, audition your creations, and export them as MIDI files or to other applications. Ideal for composers and students seeking to expand their musical horizons.

**Highlights:** Generate and manipulate musical scales, Detailed scale definition and editing, Audition scales within the app, Export as MIDI or to Gestrument, Predefined scales from various traditions, Explore microtonal and experimental tunings

**In-app purchases:** none


### Tapko Harmony

[App page](https://appshunter.io/ios/app/tapko-harmony/id6771907011)

**Currently charting:** #185 Top Paid · Music (US App Store)

**In-app purchases:** none


## Frequently asked questions

### Is ScaleGen free?

ScaleGen costs $3.99, with no in-app purchases.

### Is Tapko Harmony free?

Tapko Harmony costs $19.99, with no in-app purchases.

### Do ScaleGen or Tapko Harmony have ads?

Neither ScaleGen nor Tapko Harmony shows ads.

### Which is updated more often, ScaleGen or Tapko Harmony?

ScaleGen ships an update every 29 months, and Tapko Harmony every 4 days. Most recently, ScaleGen was updated on November 13, 2026 and Tapko Harmony on November 10, 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.*