# BioState vs Vow Fasting

BioState and Vow Fasting are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. BioState sells 1 one-off in-app purchase and Vow Fasting sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | BioState | Vow Fasting |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/biostate/id6757971507/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Fortnightly |
| Monetization | Freemium | — |
| Size | 1 MB | 13 MB |
| Requires iOS | 18.5 | **17.6** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [xavier toefield](https://appshunter.io/developer/1858079665) | [FILIP LUCCA KEJSER DAMICI](https://appshunter.io/developer/6776396594) |

## What reviewers say

### BioState

[App page](https://appshunter.io/ios/app/biostate/id6757971507)

This app tracks intermittent fasting progress, visualizing biological insights based on elapsed time. It helps users understand their body's metabolic stages, from processing meals to cellular cleanup, with advanced iOS integrations for at-a-glance monitoring.

**Highlights:** Fasting timer with metabolic stage visualization, Live Activities and Dynamic Island integration, Home Screen widgets, Retroactive timer editing ('Time Machine'), On-device data processing, No account or data collection required

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro | $9.99 | one-time |


### Vow Fasting

[App page](https://appshunter.io/ios/app/vow-fasting/id6776396592)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vow Pro Monthly | $4.99 | per month |
| Vow Pro Annual | $39.99 | per year |


## Frequently asked questions

### Is BioState free?

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

### Is Vow Fasting free?

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

### Do BioState or Vow Fasting have ads?

Neither BioState nor Vow Fasting shows ads.

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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.*