# Blue2Factor vs isPrime?

The clearest difference is update cadence: isPrime? at daily against Blue2Factor's every 2 months. Blue2Factor's advantage is device support (4 vs 2). On price, ads, 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.

Blue2Factor ships an update every 2 months, isPrime? daily. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Blue2Factor | isPrime? |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/blue2factor/id1601861068/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Free | — |
| Size | 11 MB | 0 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Christopher McLain](https://appshunter.io/developer/1107662428) | [Omer Faruk Mesebuken](https://appshunter.io/developer/1655501999) |

## What reviewers say

### Blue2Factor

[App page](https://appshunter.io/ios/app/blue2factor/id1601861068)

This app offers seamless and secure authentication using proximity, biometrics, and encryption. It integrates with SAML for single sign-on, creating a frictionless user experience.

**Highlights:** Invisible first and second factor authentication, Single sign-on via SAML, Proximity verification, Biometric authentication, Asymmetric encryption, Frictionless and secure environment

**In-app purchases:** none


### isPrime?

[App page](https://appshunter.io/ios/app/isprime/id6478832061)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Blue2Factor free?

Blue2Factor is free to download, with no in-app purchases.

### Is isPrime? free?

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

### Do Blue2Factor or isPrime? have ads?

Neither Blue2Factor nor isPrime? shows ads.

### Which is updated more often, Blue2Factor or isPrime??

Blue2Factor ships an update every 2 months, and isPrime? daily. Most recently, Blue2Factor was updated on October 1, 2026 and isPrime? on October 7, 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.*