# Workshop AI vs Sign Doc

The clearest difference is in-app purchases: Workshop AI at none against Sign Doc's 4. Workshop AI also leads on ads (none vs shown). Sign Doc's advantage is update cadence (every 2 days vs monthly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Sign Doc sells 4 in-app purchases, starting at $5.99 per month. Workshop AI asks for nothing beyond the download.

Workshop AI ships an update monthly, Sign Doc every 2 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Workshop AI | Sign Doc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (10 ratings)](https://appshunter.io/ios/app/workshop-ai-tool-inventory/id6755446543/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Free | — |
| Size | 44 MB | 70 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Edward Morgan](https://appshunter.io/developer/1853954771) | [Siddharth Ghedia](https://appshunter.io/developer/1361995352) |

## What reviewers say

### Workshop AI

[App page](https://appshunter.io/ios/app/workshop-ai-tool-inventory/id6755446543)

Effortlessly create a searchable inventory of your tools by simply taking photos. The app automatically identifies items, allowing you to quickly find what you need, track borrowed tools, and avoid buying duplicates. Designed for practical use in workshops and job sites.

**Highlights:** AI-powered tool identification from photos, Searchable inventory, Tool check-in/check-out tracking, Organize by category, location, or tags, Avoid duplicate purchases, No account or login required

**Features:** macOS Compatibility

**In-app purchases:** none


### Sign Doc

[App page](https://appshunter.io/ios/app/sign-doc-pdf-scanner/id6812717867)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $5.99 | per month |
| Pro Annual | $29.99 | per year |
| Pro Annual Intro | $29.99 | per year |
| Lifetime Pro | $59.99 | one-time |


## Frequently asked questions

### Is Workshop AI free?

Workshop AI is free to download, with no in-app purchases.

### Is Sign Doc free?

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

### Do Workshop AI or Sign Doc have ads?

Sign Doc shows ads; Workshop AI does not.

### Which is updated more often, Workshop AI or Sign Doc?

Workshop AI ships an update monthly, and Sign Doc every 2 days. Most recently, Workshop AI was updated on October 24, 2026 and Sign Doc on October 24, 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.*