# Bivryn Biological Intelligence vs Sleep Tracker

The clearest difference is in-app purchases: Sleep Tracker at none against Bivryn Biological Intelligence's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Bivryn Biological Intelligence sells 2 in-app purchases, starting at $14.99 per month. Sleep Tracker asks for nothing beyond the download.

Bivryn Biological Intelligence ships an update every 11 days, Sleep Tracker every 6 days. The most recent releases landed on October 25, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Bivryn Biological Intelligence | Sleep Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 6 days** |
| Size | 24 MB | 24 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [Amita Dhand](https://appshunter.io/developer/1437246199) | [Sven Kraln](https://appshunter.io/developer/6816678493) |

## What reviewers say

### 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 |


### Sleep Tracker

[App page](https://appshunter.io/ios/app/sleep-tracker-cernidia/id6816678341)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Bivryn Biological Intelligence free?

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

### Is Sleep Tracker free?

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

### Do Bivryn Biological Intelligence or Sleep Tracker have ads?

Neither Bivryn Biological Intelligence nor Sleep Tracker shows ads.

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

Bivryn Biological Intelligence ships an update every 11 days, and Sleep Tracker every 6 days. Most recently, Bivryn Biological Intelligence was updated on October 25, 2026 and Sleep Tracker on October 16, 2026.

---

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