# DruML Companion vs Undersong

The clearest difference is price: DruML Companion at Free against Undersong's $9.99. DruML Companion also leads on iOS requirement (15.0 vs 17.0). Undersong's advantage is update cadence (daily vs every 2 months). On ads, in-app purchases and device support there is nothing between them.

DruML Companion is free to download; Undersong costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

DruML Companion ships an update every 2 months, Undersong daily. The most recent releases landed on October 19, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | DruML Companion | Undersong |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | — | **[5.0 (11 ratings)](https://appshunter.io/ios/app/undersong/id6802013758/reviews)** |
| Number of ratings | — | **11** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | — | Paid |
| Size | 21 MB | 19 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Michael Campbell](https://appshunter.io/developer/1896579088) | [ian johnston](https://appshunter.io/developer/1886071653) |

## What reviewers say

### DruML Companion

[App page](https://appshunter.io/ios/app/druml-companion/id6768497875)

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

**In-app purchases:** none


### Undersong

[App page](https://appshunter.io/ios/app/undersong/id6802013758)

This audio effect acts like an instrument, generating synthesized notes in key based on incoming audio. Explore a vast array of sound combinations with various materials, modes, and patterns for unique ambient performances.

**Highlights:** Generates in-key synthesized notes from audio input, 12 material types and 10 performance modes, 10 pattern options for sound shaping, Self-generating ambient pad mode, Gravity feature for melodic anchoring, Customizable scales and root notes, Integrated reverb effect

**In-app purchases:** none


## Frequently asked questions

### Is DruML Companion free?

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

### Is Undersong free?

Undersong costs $9.99, with no in-app purchases.

### Do DruML Companion or Undersong have ads?

Neither DruML Companion nor Undersong shows ads.

### Which is updated more often, DruML Companion or Undersong?

DruML Companion ships an update every 2 months, and Undersong daily. Most recently, DruML Companion was updated on October 19, 2026 and Undersong on October 25, 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.*