# Ostron vs Rezet

The clearest difference is in-app purchases: Ostron at none against Rezet's 3. Rezet's advantage is update cadence (weekly vs every 5 weeks) and iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Rezet sells 3 in-app purchases, starting at $11.99 per month. Ostron asks for nothing beyond the download.

Ostron ships an update every 5 weeks, Rezet weekly. The most recent releases landed on September 24, 2026 and August 28, 2026 respectively.

## The numbers

| Metric | Ostron | Rezet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rezet-nervous-system-reset/id6754094647/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | — | Freemium |
| Size | 31 MB | 33 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ostron Ltd.](https://appshunter.io/developer/1749802851) | [Arun Nijhawan](https://appshunter.io/developer/1846627343) |

## What reviewers say

### Ostron

[App page](https://appshunter.io/ios/app/ostron/id6476379366)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rezet

[App page](https://appshunter.io/ios/app/rezet-nervous-system-reset/id6754094647)

This app helps you shift from a stress response to a calmer state using somatic practices and polyvagal-informed guidance. It offers daily grounding exercises and insights, with premium features for personalized plans and advanced analytics.

**Highlights:** Daily grounding practices, Intro somatic tools, HRV-informed stress insights, Breathwork exercises, Personalized somatic plans, Unlimited AI guidance, Nervous system analytics

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $11.99 | per month |
| Quarterly Subscription | $29.99 | per 3 months |
| Yearly Subscription | $89.99 | per year |


## Frequently asked questions

### Is Ostron free?

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

### Is Rezet free?

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

### Do Ostron or Rezet have ads?

Neither Ostron nor Rezet shows ads.

### Which is updated more often, Ostron or Rezet?

Ostron ships an update every 5 weeks, and Rezet weekly. Most recently, Ostron was updated on September 24, 2026 and Rezet on August 28, 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.*