# OptoFidelity Athena vs Phiro Authenticator

The clearest difference is update cadence: OptoFidelity Athena at every 6 weeks against Phiro Authenticator's every 26 months. OptoFidelity Athena also leads on iOS requirement (12.0 vs 15.1). 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.

OptoFidelity Athena ships an update every 6 weeks, Phiro Authenticator every 26 months. The most recent releases landed on October 11, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | OptoFidelity Athena | Phiro Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 26 months |
| Size | 10 MB | 18 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [OptoFidelity](https://appshunter.io/developer/921999079) | [SPASI INDONESIA, PT](https://appshunter.io/developer/1441603569) |

## What reviewers say

### OptoFidelity Athena

[App page](https://appshunter.io/ios/app/optofidelity-athena/id1538428735)

**Features:** macOS Compatibility

**In-app purchases:** none


### Phiro Authenticator

[App page](https://appshunter.io/ios/app/phiro-authenticator/id1555615051)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OptoFidelity Athena free?

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

### Is Phiro Authenticator free?

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

### Do OptoFidelity Athena or Phiro Authenticator have ads?

Neither OptoFidelity Athena nor Phiro Authenticator shows ads.

### Which is updated more often, OptoFidelity Athena or Phiro Authenticator?

OptoFidelity Athena ships an update every 6 weeks, and Phiro Authenticator every 26 months. Most recently, OptoFidelity Athena was updated on October 11, 2026 and Phiro Authenticator on September 27, 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.*