# Photon Pro vs HD Security

The clearest difference is update cadence: Photon Pro at every 4 months against HD Security's every 20 months. 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.

Photon Pro ships an update every 4 months, HD Security every 20 months. The most recent releases landed on October 5, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Photon Pro | HD Security |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 20 months |
| Size | 101 MB | 136 MB |
| Requires iOS | **12.0** | 13.4 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SIAM INDUSTRIA DE AUTOMACAO E MONITORAMENTO LTDA.](https://appshunter.io/developer/1346976542) | [HD Sistemas de Segurança](https://appshunter.io/developer/1642565601) |

## What reviewers say

### Photon Pro

[App page](https://appshunter.io/ios/app/photon-pro-access-control/id1616714936)

**Features:** macOS Compatibility

**In-app purchases:** none


### HD Security

[App page](https://appshunter.io/ios/app/hd-security/id1642565599)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Photon Pro free?

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

### Is HD Security free?

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

### Do Photon Pro or HD Security have ads?

Neither Photon Pro nor HD Security shows ads.

### Which is updated more often, Photon Pro or HD Security?

Photon Pro ships an update every 4 months, and HD Security every 20 months. Most recently, Photon Pro was updated on October 5, 2026 and HD Security on September 29, 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.*