# Open Step vs Certainty

The clearest difference is ads: Certainty at none against Open Step's shown. Open Step's advantage is update cadence (every 5 days vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Open Step sells 11 in-app purchases, starting at $4.99 per month and Certainty sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

Open Step ships an update every 5 days, Certainty every 3 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Open Step | Certainty |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/open-step-ocd-and-exposure/id6768040897/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 3 months |
| Size | 34 MB | 78 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Faravaree lab](https://appshunter.io/developer/1732439357) | [The Ables Inc.](https://appshunter.io/developer/6772387866) |

## What reviewers say

### Open Step

[App page](https://appshunter.io/ios/app/open-step-ocd-and-exposure/id6768040897)

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpenStep Pro — Monthly | $4.99 | per month |
| Premium Weekly Access | $4.99 | per 7 days |
| OpenStep Pro — Monthly | $7.99 | per month |
| OpenStep Pro — Monthly | $9.99 | per month |
| OpenStep Pro — Yearly (Special) | $24.99 | per year |
| OpenStep Pro — Yearly | $29.99 | per year |
| OpenStep Pro — Yearly | $47.99 | per year |
| OpenStep Pro — Yearly | $59.99 | per year |
| Yearly | $59.99 | per year |
| Yearly | $119.99 | per year |
| AI Recovery Report | $24.99 | one-time |


### Certainty

[App page](https://appshunter.io/ios/app/certainty-wellness/id6772387864)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Certainty Premium | $12.99 | per month |
| Certainty Premium | $69.99 | per year |


## Frequently asked questions

### Is Open Step free?

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

### Is Certainty free?

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

### Do Open Step or Certainty have ads?

Open Step shows ads; Certainty does not.

### Which is updated more often, Open Step or Certainty?

Open Step ships an update every 5 days, and Certainty every 3 months. Most recently, Open Step was updated on October 24, 2026 and Certainty on October 24, 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.*