# Optimal Performance Center vs Digihappy

The clearest difference is in-app purchases: Digihappy at none against Optimal Performance Center's 1. Digihappy also leads on update cadence (every 3 weeks vs every 3 months) and iOS requirement (13.2 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Optimal Performance Center sells 1 one-off in-app purchase. Digihappy asks for nothing beyond the download.

Optimal Performance Center ships an update every 3 months, Digihappy every 3 weeks. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Optimal Performance Center | Digihappy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 38 MB | 76 MB |
| Requires iOS | 15.0 | **13.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Trainero.com](https://appshunter.io/developer/1437140834) | [Digihappy](https://appshunter.io/developer/1609594254) |

## What reviewers say

### Optimal Performance Center

[App page](https://appshunter.io/ios/app/optimal-performance-center/id1604557129)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Online Coaching Plan | $89.99 | one-time |


### Digihappy

[App page](https://appshunter.io/ios/app/digihappy/id1609594252)

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

**In-app purchases:** none


## Frequently asked questions

### Is Optimal Performance Center free?

Optimal Performance Center is free to download, with in-app purchases available.

### Is Digihappy free?

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

### Do Optimal Performance Center or Digihappy have ads?

Neither Optimal Performance Center nor Digihappy shows ads.

### Which is updated more often, Optimal Performance Center or Digihappy?

Optimal Performance Center ships an update every 3 months, and Digihappy every 3 weeks. Most recently, Optimal Performance Center was updated on October 8, 2026 and Digihappy on October 1, 2026.

---

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