# MobileID vs Casulo

The clearest difference is in-app purchases: MobileID at none against Casulo's 2. MobileID also leads on iOS requirement (11.0 vs 16.0). Casulo's advantage is update cadence (fortnightly vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Casulo sells 2 in-app purchases, starting at $1.99 per month. MobileID asks for nothing beyond the download.

MobileID ships an update every 4 months, Casulo fortnightly. The most recent releases landed on September 28, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | MobileID | Casulo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.5 (15 ratings)](https://appshunter.io/ios/app/mobileid/id990783086/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 91 MB | 34 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Certisign](https://appshunter.io/developer/669158783) | [MOUX](https://appshunter.io/developer/858226348) |

## What reviewers say

### MobileID

[App page](https://appshunter.io/ios/app/mobileid/id990783086)

Securely authenticate yourself and sign electronic documents with legal validity using your digital certificate on mobile devices. This service enables strong identification and document signing directly from your smartphone or tablet.

**Highlights:** Strong user authentication, Electronic document signing, Legal validity, Mobile device integration, ICP-Brasil digital certificate support

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

**In-app purchases:** none


### Casulo

[App page](https://appshunter.io/ios/app/casulo/id6794512667)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Casulo Pro Mensal | $1.99 | per month |
| Casulo Pro Anual | $7.99 | per year |


## Frequently asked questions

### Is MobileID free?

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

### Is Casulo free?

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

### Do MobileID or Casulo have ads?

Neither MobileID nor Casulo shows ads.

### Which is updated more often, MobileID or Casulo?

MobileID ships an update every 4 months, and Casulo fortnightly. Most recently, MobileID was updated on September 28, 2026 and Casulo on October 6, 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.*