# DruML Companion vs HeadStack

The clearest difference is price: DruML Companion at Free against HeadStack's $12.99. HeadStack's advantage is update cadence (every 9 days vs every 2 months) and chart position (#184 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

DruML Companion is free to download; HeadStack costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

DruML Companion ships an update every 2 months, HeadStack every 9 days. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | DruML Companion | HeadStack |
| --- | --- | --- |
| Price | **Free** | $12.99 |
| Rating | — | **[4.8 (5 ratings)](https://appshunter.io/ios/app/headstack/id6781611375/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | — | Paid |
| Best chart rank | — | **#184** |
| Size | 21 MB | 25 MB |
| Requires iOS | 15.0 | **14** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Michael Campbell](https://appshunter.io/developer/1896579088) | [4Pockets.com](https://appshunter.io/developer/370131860) |

## 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


### HeadStack

[App page](https://appshunter.io/ios/app/headstack/id6781611375)

**Currently charting:** #184 Top Paid · Music (US App Store)

This app offers a virtual tape loop with 8 independently configurable playback heads for creating diverse echo effects. It captures the warmth of classic tape machines while offering modern flexibility for sound design, from vintage echoes to evolving ambient textures.

**Highlights:** Multi-head tape engine with 8 playback heads, Vintage tape character and imperfections, Independent control for each playback head, Rotating head wheel for dynamic effects, Granular harmony engine for pitch-shifted textures, Per-head modulation and creative feedback routing, Diffusion and smearing for atmospheric washes

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

**In-app purchases:** none


## Frequently asked questions

### Is DruML Companion free?

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

### Is HeadStack free?

HeadStack costs $12.99, with no in-app purchases.

### Do DruML Companion or HeadStack have ads?

Neither DruML Companion nor HeadStack shows ads.

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

DruML Companion ships an update every 2 months, and HeadStack every 9 days. Most recently, DruML Companion was updated on October 1, 2026 and HeadStack on October 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.*