# Stayf vs ZERO Training Center

The clearest difference is update cadence: ZERO Training Center at every 3 weeks against Stayf's every 2 months. ZERO Training Center also leads on iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Stayf ships an update every 2 months, ZERO Training Center every 3 weeks. The most recent releases landed on October 9, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Stayf | ZERO Training Center |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/zero-training-center/id6746328015/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 123 MB | 31 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [STAYF LTD](https://appshunter.io/developer/1703027959) | [TeamUp Sports](https://appshunter.io/developer/1449504626) |

## What reviewers say

### Stayf

[App page](https://appshunter.io/ios/app/stayf/id6462422271)

**Features:** Vision Pro support

**In-app purchases:** none


### ZERO Training Center

[App page](https://appshunter.io/ios/app/zero-training-center/id6746328015)

This app helps you manage your health and fitness journey. Book classes, track workout progress, monitor body measurements, and connect with club staff. It integrates with Apple Health to import data from wearables and track daily activity.

**Highlights:** Book classes online, Track workout progress, Monitor body measurements, Contact club staff, Apple Health integration, Import wearable data

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Stayf free?

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

### Is ZERO Training Center free?

ZERO Training Center is free to download, with no in-app purchases.

### Do Stayf or ZERO Training Center have ads?

Neither Stayf nor ZERO Training Center shows ads.

### Which is updated more often, Stayf or ZERO Training Center?

Stayf ships an update every 2 months, and ZERO Training Center every 3 weeks. Most recently, Stayf was updated on October 9, 2026 and ZERO Training Center on October 17, 2026.

---

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