# RackDocs vs Sunnandaeg

The clearest difference is price: RackDocs at Free against Sunnandaeg's $4.99. Sunnandaeg's advantage is in-app purchases (none vs 4). On update cadence, ads, device support and iOS requirement there is nothing between them.

RackDocs is free to download; Sunnandaeg costs $4.99 up front. RackDocs sells 4 in-app purchases, starting at $0.99 per month. Sunnandaeg asks for nothing beyond the download.

RackDocs ships an update weekly, Sunnandaeg every 5 days. The most recent releases landed on November 9, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | RackDocs | Sunnandaeg |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/rackdocs-eurorack-reference/id6753894257/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Monetization | Freemium | — |
| Size | 31 MB | 2 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TheMM](https://appshunter.io/developer/312265848) | [Kei Odaka](https://appshunter.io/developer/6807615300) |

## What reviewers say

### 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 |


### Sunnandaeg

[App page](https://appshunter.io/ios/app/sunnandaeg/id6807615298)

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

**In-app purchases:** none


## Frequently asked questions

### Is RackDocs free?

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

### Is Sunnandaeg free?

Sunnandaeg costs $4.99, with no in-app purchases.

### Do RackDocs or Sunnandaeg have ads?

Neither RackDocs nor Sunnandaeg shows ads.

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

RackDocs ships an update weekly, and Sunnandaeg every 5 days. Most recently, RackDocs was updated on November 9, 2026 and Sunnandaeg on November 8, 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.*