# BiosystemLock vs Odyssey Advisory

The clearest difference is iOS requirement: Odyssey Advisory at 9.0 against BiosystemLock's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

BiosystemLock ships an update every 14 months, Odyssey Advisory every 8 months. The most recent releases landed on October 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | BiosystemLock | Odyssey Advisory |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 8 months** |
| Size | 381 MB | 163 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Goh Siang Aik](https://appshunter.io/developer/1444710737) | [Stark Group Pte. Ltd.](https://appshunter.io/developer/1219881311) |

## What reviewers say

### BiosystemLock

[App page](https://appshunter.io/ios/app/biosystemlock/id1444710738)

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

**In-app purchases:** none


### Odyssey Advisory

[App page](https://appshunter.io/ios/app/odyssey-advisory/id6451226999)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BiosystemLock free?

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

### Is Odyssey Advisory free?

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

### Do BiosystemLock or Odyssey Advisory have ads?

Neither BiosystemLock nor Odyssey Advisory shows ads.

### Which is updated more often, BiosystemLock or Odyssey Advisory?

BiosystemLock ships an update every 14 months, and Odyssey Advisory every 8 months. Most recently, BiosystemLock was updated on October 3, 2026 and Odyssey Advisory on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*