# eiRIS Biometrics vs FairInvoice

The clearest difference is update cadence: FairInvoice at every 2 weeks against eiRIS Biometrics's every 3 months. eiRIS Biometrics's advantage is iOS requirement (15.6 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.

eiRIS Biometrics ships an update every 3 months, FairInvoice every 2 weeks. The most recent releases landed on October 9, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | eiRIS Biometrics | FairInvoice |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Size | 126 MB | 16 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [MNLeistung Inc.](https://appshunter.io/developer/1718688658) | [Moaath Othman](https://appshunter.io/developer/866641649) |

## What reviewers say

### eiRIS Biometrics

[App page](https://appshunter.io/ios/app/eiris-biometrics/id6759940959)

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

**In-app purchases:** none


### FairInvoice

[App page](https://appshunter.io/ios/app/fairinvoice-invoice-maker/id6789216704)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is eiRIS Biometrics free?

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

### Is FairInvoice free?

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

### Do eiRIS Biometrics or FairInvoice have ads?

Neither eiRIS Biometrics nor FairInvoice shows ads.

### Which is updated more often, eiRIS Biometrics or FairInvoice?

eiRIS Biometrics ships an update every 3 months, and FairInvoice every 2 weeks. Most recently, eiRIS Biometrics was updated on October 9, 2026 and FairInvoice on September 30, 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.*