# TrueZone vs Bivryn Biological Intelligence

The clearest difference is update cadence: Bivryn Biological Intelligence at every 11 days against TrueZone's every 3 weeks. TrueZone's advantage is iOS requirement (14.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. TrueZone sells 2 one-off in-app purchases and Bivryn Biological Intelligence sells 2 in-app purchases, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.

TrueZone ships an update every 3 weeks, Bivryn Biological Intelligence every 11 days. The most recent releases landed on May 16, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | TrueZone | Bivryn Biological Intelligence |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 11 days** |
| Size | 72 MB | 24 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [Driftline ehf.](https://appshunter.io/developer/1574232641) | [Amita Dhand](https://appshunter.io/developer/1437246199) |

## What reviewers say

### TrueZone

[App page](https://appshunter.io/ios/app/truezone/id1574232639)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Heart rate analysis | $5.99 | one-time |
| 10 fitness tests | $49.99 | one-time |


### Bivryn Biological Intelligence

[App page](https://appshunter.io/ios/app/bivryn-biological-intelligence/id6774502017)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bivryn Premium Monthly | $14.99 | per month |
| Bivryn Premium Annual | $99.99 | per year |


## Frequently asked questions

### Is TrueZone free?

TrueZone is free to download, with in-app purchases available.

### Is Bivryn Biological Intelligence free?

Bivryn Biological Intelligence is free to download, with in-app purchases available.

### Do TrueZone or Bivryn Biological Intelligence have ads?

Neither TrueZone nor Bivryn Biological Intelligence shows ads.

### Which is updated more often, TrueZone or Bivryn Biological Intelligence?

TrueZone ships an update every 3 weeks, and Bivryn Biological Intelligence every 11 days. Most recently, TrueZone was updated on May 16, 2026 and Bivryn Biological Intelligence on September 10, 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.*