# GemBrain vs Sign documents Fast & Secure

The clearest difference is rating: Sign documents Fast & Secure at 5.0 against GemBrain's 3.7. Sign documents Fast & Secure also leads on ads (none vs shown). GemBrain's advantage is update cadence (weekly vs monthly) and ratings volume (18 vs 2). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. GemBrain sells 8 in-app purchases, starting at $7.99 per 7 days and Sign documents Fast & Secure sells 2 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Sign documents Fast & Secure holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: GemBrain has 18 ratings behind it against 2, so its average is the more settled of the two.

GemBrain ships an update weekly, Sign documents Fast & Secure monthly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | GemBrain | Sign documents Fast & Secure |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (18 ratings)](https://appshunter.io/ios/app/gembrain-crystal-identifier/id6754960446/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sign-documents-fast-and-secure/id6768265137/reviews)** |
| Number of ratings | **18** | 2 |
| Positive reviews | 63.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Monthly |
| Monetization | Freemium | — |
| Size | 72 MB | 28 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Apparent Group Limited](https://appshunter.io/developer/1820362419) | [UPPER UNIT Korlatolt Felelossegu Tarsasag](https://appshunter.io/developer/1896555201) |

## What reviewers say

### GemBrain

[App page](https://appshunter.io/ios/app/gembrain-crystal-identifier/id6754960446)

Instantly identify gemstones, crystals, and minerals with AI-powered photo analysis. Get detailed properties, market values, and learn to spot fakes. Organize your collection and access expert advice.

**Highlights:** AI gemstone identification, Market value estimation, Fake stone detection, Collection management, AI expert assistant, Built-in metal detector

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $7.99 | per 7 days |
| Gem Brain Weekly Access | $9.99 | per 7 days |
| Gem Brain Annual Promo | $19.99 | per year |
| Yearly Offer | $24.99 | per year |
| Gem Brain Annual Access | $29.99 | per year |
| Annual Access | $39.99 | per year |
| Annual Access | $39.99 | per year |
| Yearly Plan | $39.99 | per year |


### Sign documents Fast & Secure

[App page](https://appshunter.io/ios/app/sign-documents-fast-and-secure/id6768265137)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock full access | $5.99 | per 7 days |
| Fast & Secure Sign Pro | $5.99 | per 7 days |


## Frequently asked questions

### Is GemBrain free?

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

### Is Sign documents Fast & Secure free?

Sign documents Fast & Secure is free to download, with in-app purchases available.

### Which has better reviews, GemBrain or Sign documents Fast & Secure?

Sign documents Fast & Secure is rated higher. GemBrain averages 3.7 out of 5 from 18 ratings, while Sign documents Fast & Secure averages 5.0 from 2 ratings.

### Do GemBrain or Sign documents Fast & Secure have ads?

GemBrain shows ads; Sign documents Fast & Secure does not.

### Which is updated more often, GemBrain or Sign documents Fast & Secure?

GemBrain ships an update weekly, and Sign documents Fast & Secure monthly. Most recently, GemBrain was updated on October 25, 2026 and Sign documents Fast & Secure on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*