# Certisign SignApp vs Certillion

The clearest difference is iOS requirement: Certisign SignApp at 12.0 against Certillion's 16.1. On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Certisign SignApp ships an update every 2 months, Certillion every 5 weeks. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Certisign SignApp | Certillion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.6 (9 ratings)](https://appshunter.io/ios/app/certisign-signapp/id1200797745/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 2.3% of reviews | **6.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 62 MB | 33 MB |
| Requires iOS | **12.0** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Certisign](https://appshunter.io/developer/669158783) | [e-Sec](https://appshunter.io/developer/657383169) |

## What reviewers say

### Certisign SignApp

[App page](https://appshunter.io/ios/app/certisign-signapp/id1200797745)

Sign documents online from anywhere, anytime. Capture your signature on screen or use a digital certificate. The app collects evidence like IP and geolocation to ensure legal validity.

**Highlights:** Online document signing, On-screen signature capture, Digital certificate A1 support, IP and geolocation evidence, Legal validity, Signature protocol generation

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

**In-app purchases:** none


### Certillion

[App page](https://appshunter.io/ios/app/certillion/id1489758453)

Sign documents on your mobile device using digital certificates. This app offers legal validity, internet speed, and mobile convenience for contracts, bills, and other secure transactions. Obtain a digital certificate for free at registered locations or use your existing A1 certificate.

**Highlights:** Sign documents with digital certificates, Legal validity for transactions, Mobile convenience for signing anywhere, Securely sign contracts and bills, Free digital certificate acquisition

**In-app purchases:** none


## Frequently asked questions

### Is Certisign SignApp free?

Certisign SignApp is free to download, with no in-app purchases.

### Is Certillion free?

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

### Do Certisign SignApp or Certillion have ads?

Neither Certisign SignApp nor Certillion shows ads.

### Which is updated more often, Certisign SignApp or Certillion?

Certisign SignApp ships an update every 2 months, and Certillion every 5 weeks. Most recently, Certisign SignApp was updated on October 29, 2026 and Certillion on October 26, 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.*