# Skulptur vs RackDocs

The clearest difference is price: RackDocs at Free against Skulptur's $12.99. RackDocs also leads on update cadence (weekly vs every 2 months). Skulptur's advantage is in-app purchases (none vs 4) and device support (4 vs 2). On rating, review sentiment, ratings volume and ads there is nothing between them.

RackDocs is free to download; Skulptur costs $12.99 up front. RackDocs sells 4 in-app purchases, starting at $0.99 per month. Skulptur asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Skulptur against 5.0 for RackDocs. Both are backed by a comparable volume of ratings — 8 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Skulptur ships an update every 2 months, RackDocs weekly. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Skulptur | RackDocs |
| --- | --- | --- |
| Price | $12.99 | **Free** |
| Rating | [5.0 (8 ratings)](https://appshunter.io/ios/app/skulptur/id6741394300/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/rackdocs-eurorack-reference/id6753894257/reviews) |
| Number of ratings | **8** | 4 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Paid | **Freemium** |
| Size | 3 MB | 31 MB |
| Requires iOS | **13** | 18.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bram Bos](https://appshunter.io/developer/325340444) | [TheMM](https://appshunter.io/developer/312265848) |

## What reviewers say

### Skulptur

[App page](https://appshunter.io/ios/app/skulptur/id6741394300)

This interactive filter instrument offers a unique way to manipulate sounds with touch-centric controls. Animate and sculpt your audio using 10 surgical filters with kinetic sliders and innovative gestures.

**Highlights:** 10-band surgical filters, Kinetic sliders, Touch-centric innovations, Built-in noise generator, LFO mode, Multiple UI modes

**Features:** Vision Pro support

**In-app purchases:** none


### RackDocs

[App page](https://appshunter.io/ios/app/rackdocs-eurorack-reference/id6753894257)

Document your modular synth modules with photos, notes, and AI assistance. Track switch positions, LED behavior, and multi-step operations. Sync across devices and access a community library of module documentation.

**Highlights:** Photo-based module documentation, AI annotation extraction from manuals, Multi-context documentation, LED behavior tracking, Switch position guides, Community library access, Offline mode and iCloud sync

**Features:** macOS Compatibility, Family Sharing, iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Yearly Subscription | $3.99 | per year |
| Yearly Supporter | $8.99 | per year |
| Lifetime Access | $44.99 | one-time |


## Frequently asked questions

### Is Skulptur free?

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

### Is RackDocs free?

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

### Which has better reviews, Skulptur or RackDocs?

Skulptur and RackDocs are both rated 5.0 out of 5 on the App Store, from 8 and 4 ratings respectively.

### Do Skulptur or RackDocs have ads?

Neither Skulptur nor RackDocs shows ads.

### Which is updated more often, Skulptur or RackDocs?

Skulptur ships an update every 2 months, and RackDocs weekly. Most recently, Skulptur was updated on October 30, 2026 and RackDocs on November 9, 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.*