# Certisign SignApp vs Protlarm

Certisign SignApp and Protlarm are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Certisign SignApp | Protlarm |
| --- | --- | --- |
| 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 | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 62 MB | 41 MB |
| Requires iOS | **12.0** | 13.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Certisign](https://appshunter.io/developer/669158783) | [Quadion Tecnologia](https://appshunter.io/developer/1580603967) |

## 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


### Protlarm

[App page](https://appshunter.io/ios/app/protlarm/id6499367220)

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

**In-app purchases:** none


## Frequently asked questions

### Is Certisign SignApp free?

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

### Is Protlarm free?

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

### Do Certisign SignApp or Protlarm have ads?

Neither Certisign SignApp nor Protlarm shows ads.

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

Certisign SignApp ships an update every 2 months, and Protlarm every 2 months. Most recently, Certisign SignApp was updated on October 15, 2026 and Protlarm on October 9, 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.*