# Web PKI vs Sign App

The clearest difference is rating: Sign App at 5.0 against Web PKI's 1.0. Sign App also leads on update cadence (every 3 weeks vs every 2 months). Web PKI's advantage is in-app purchases (none vs 3) and ratings volume (4 vs 1). On price and ads there is nothing between them.

Both are free to download. Sign App sells 3 in-app purchases, starting at $4.99 per month. Web PKI asks for nothing beyond the download.

Sign App holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Web PKI ships an update every 2 months, Sign App every 3 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Web PKI | Sign App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (4 ratings)](https://appshunter.io/ios/app/web-pki/id1390701957/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sign-app-e-signature-maker/id6759666259/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | **Free** | Freemium |
| Size | 31 MB | 13 MB |
| Requires iOS | **15.0** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | +4 | 4+ |
| Developer | [Lacuna Software](https://appshunter.io/developer/1390701956) | [Kenan Sezginbas](https://appshunter.io/developer/1719264045) |

## What reviewers say

### Web PKI

[App page](https://appshunter.io/ios/app/web-pki/id1390701957)

Perform digital signatures using certificates from your mobile device on compatible websites and applications. Securely authenticate documents and transactions on the go.

**Highlights:** Digital signatures with mobile certificates, Compatibility with websites, Compatibility with applications, Secure authentication

**Features:** Vision Pro support

**In-app purchases:** none


### Sign App

[App page](https://appshunter.io/ios/app/sign-app-e-signature-maker/id6759666259)

Easily sign PDF documents, scan paper files, and manage your paperwork. Create custom electronic signatures and apply them to documents in seconds. Organize, export, and share your signed files securely.

**Highlights:** Create and apply electronic signatures, Scan paper documents to PDF, Import and edit PDF files, Organize documents with folders, Export and share signed PDFs, Local document storage

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription Monthly | $4.99 | per month |
| Subscription Yearly | $14.99 | per year |
| Subscription Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is Web PKI free?

Web PKI is free to download, with no in-app purchases.

### Is Sign App free?

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

### Which has better reviews, Web PKI or Sign App?

Sign App is rated higher. Web PKI averages 1.0 out of 5 from 4 ratings, while Sign App averages 5.0 from 1 ratings.

### Do Web PKI or Sign App have ads?

Neither Web PKI nor Sign App shows ads.

### Which is updated more often, Web PKI or Sign App?

Web PKI ships an update every 2 months, and Sign App every 3 weeks. Most recently, Web PKI was updated on November 6, 2026 and Sign App on October 31, 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.*