# Open OAB RJ vs Certisign

The clearest difference is ads: Certisign at none against Open OAB RJ's shown. Certisign also leads on device support (3 vs 1). Open OAB RJ's advantage is update cadence (fortnightly vs every 5 weeks). On price, in-app purchases and iOS requirement there is nothing between them.

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

Open OAB RJ ships an update fortnightly, Certisign every 5 weeks. The most recent releases landed on September 7, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Open OAB RJ | Certisign |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 30.4% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | — | Free |
| Size | 10 MB | 79 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | +4 |
| Developer | [UNIVERSIA](https://appshunter.io/developer/451726993) | [Certisign](https://appshunter.io/developer/669158783) |

## What reviewers say

### Open OAB RJ

[App page](https://appshunter.io/ios/app/open-oab-rj/id6749377666)

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

**In-app purchases:** none


### Certisign

[App page](https://appshunter.io/ios/app/certisign/id6751283583)

Manage your digital identity and cloud-based digital certificates with ease and security. Authenticate access, manage certificates, and request support for a more practical and secure digital life.

**Highlights:** Cloud digital certificate management, Digital identity control, Access authentication, Support requests, Secure digital environment

**In-app purchases:** none


## Frequently asked questions

### Is Open OAB RJ free?

Open OAB RJ is free to download, with no in-app purchases.

### Is Certisign free?

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

### Do Open OAB RJ or Certisign have ads?

Open OAB RJ shows ads; Certisign does not.

### Which is updated more often, Open OAB RJ or Certisign?

Open OAB RJ ships an update fortnightly, and Certisign every 5 weeks. Most recently, Open OAB RJ was updated on September 7, 2026 and Certisign on September 21, 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.*