# SIEFIT vs HYROX Performance by CKF

The clearest difference is update cadence: SIEFIT at fortnightly against HYROX Performance by CKF's every 2 months. 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.

SIEFIT ships an update fortnightly, HYROX Performance by CKF every 2 months. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | SIEFIT | HYROX Performance by CKF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/siefit/id6475751999/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Ad-supported | — |
| Size | 74 MB | 123 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PushPress, Inc.](https://appshunter.io/developer/688595778) | [Wuebker Fitness, Inc.](https://appshunter.io/developer/1809759364) |

## What reviewers say

### SIEFIT

[App page](https://appshunter.io/ios/app/siefit/id6475751999)

Manage your gym membership and class bookings with ease. This app allows members to reserve spots in fitness classes, sign up for gym events, and handle account details like updating payment information and personal photos.

**Highlights:** Reserve class spots, Sign up for gym events, Update account information, Manage payment details, Update profile photos

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### HYROX Performance by CKF

[App page](https://appshunter.io/ios/app/hyrox-performance-by-ckf/id6744889791)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is SIEFIT free?

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

### Is HYROX Performance by CKF free?

HYROX Performance by CKF is free to download, with no in-app purchases.

### Do SIEFIT or HYROX Performance by CKF have ads?

Both SIEFIT and HYROX Performance by CKF show ads.

### Which is updated more often, SIEFIT or HYROX Performance by CKF?

SIEFIT ships an update fortnightly, and HYROX Performance by CKF every 2 months. Most recently, SIEFIT was updated on October 5, 2026 and HYROX Performance by CKF on October 12, 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.*