# HeadStack vs 055U4RY

The clearest difference is price: 055U4RY at $6.99 against HeadStack's $12.99. HeadStack's advantage is iOS requirement (14 vs 17.0). On rating, review sentiment, ratings volume and update cadence there is nothing between them.

HeadStack costs $12.99 and 055U4RY $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.8 for HeadStack against 4.9 for 055U4RY. Both are backed by a comparable volume of ratings — 5 and 13 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

HeadStack ships an update every 9 days, 055U4RY every 5 days. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | HeadStack | 055U4RY |
| --- | --- | --- |
| Price | $12.99 | **$6.99** |
| Rating | [4.8 (5 ratings)](https://appshunter.io/ios/app/headstack/id6781611375/reviews) | **[4.9 (13 ratings)](https://appshunter.io/ios/app/055u4ry/id6789734684/reviews)** |
| Number of ratings | 5 | **13** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 5 days** |
| Monetization | Paid | Paid |
| Size | 25 MB | 2 MB |
| Requires iOS | **14** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 9+ |
| Developer | [4Pockets.com](https://appshunter.io/developer/370131860) | [LASZLO DOBROVOLSZKI](https://appshunter.io/developer/6779159106) |

## What reviewers say

### HeadStack

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

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


### 055U4RY

[App page](https://appshunter.io/ios/app/055u4ry/id6789734684)

This app is a unique polyphonic synthesizer designed to evoke horror-themed soundscapes. It features a distinctive visual interface resembling a haunted DOS terminal with a skull motif, offering a variety of synthesis engines and effects for creating unsettling audio.

**Highlights:** 8-voice polyphonic synthesizer, 15 synthesis engines, Twin chaotic LFOs, Shepard-Risset layer, State-variable filter, Sample-rate reducer and bit-depth crusher, Real-time stutter buffer (GLTCH)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is HeadStack free?

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

### Is 055U4RY free?

055U4RY costs $6.99, with no in-app purchases.

### Which has better reviews, HeadStack or 055U4RY?

055U4RY is rated higher. HeadStack averages 4.8 out of 5 from 5 ratings, while 055U4RY averages 4.9 from 13 ratings.

### Do HeadStack or 055U4RY have ads?

Neither HeadStack nor 055U4RY shows ads.

### Which is updated more often, HeadStack or 055U4RY?

HeadStack ships an update every 9 days, and 055U4RY every 5 days. Most recently, HeadStack was updated on October 12, 2026 and 055U4RY on October 14, 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.*