# Autofirma App vs Colegios Zenkai software

The clearest difference is update cadence: Autofirma App at every 7 months against Colegios Zenkai software's every 17 months. Colegios Zenkai software's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Autofirma App ships an update every 7 months, Colegios Zenkai software every 17 months. The most recent releases landed on October 22, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Autofirma App | Colegios Zenkai software |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 6.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 17 months |
| Monetization | Free | — |
| Size | 35 MB | 26 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ministerio de Asuntos Economicos y Transformacion Digital](https://appshunter.io/developer/627410004) | [ZENKAI SOFTWARE SL](https://appshunter.io/developer/1762806289) |

## What reviewers say

### Autofirma App

[App page](https://appshunter.io/ios/app/autofirma-app/id627410001)

Sign electronic documents and PDFs directly from your iOS device. Supports web-based transactions and local files, requiring a digital certificate for secure authentication. Compatible with iOS 17+ and any web browser.

**Highlights:** Electronic signature for web transactions, Sign PDF documents, Digital certificate installation, iOS 17+ compatibility, Web browser integration, Cloud storage access

**Features:** Vision Pro support

**In-app purchases:** none


### Colegios Zenkai software

[App page](https://appshunter.io/ios/app/colegios-zenkai-software/id6450533575)

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

**In-app purchases:** none


## Frequently asked questions

### Is Autofirma App free?

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

### Is Colegios Zenkai software free?

Colegios Zenkai software is free to download, with no in-app purchases.

### Do Autofirma App or Colegios Zenkai software have ads?

Neither Autofirma App nor Colegios Zenkai software shows ads.

### Which is updated more often, Autofirma App or Colegios Zenkai software?

Autofirma App ships an update every 7 months, and Colegios Zenkai software every 17 months. Most recently, Autofirma App was updated on October 22, 2026 and Colegios Zenkai software on October 19, 2026.

---

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