# ZDT vs Goff Performance

The clearest difference is device support: Goff Performance at 2 against ZDT's —. On price, update cadence, in-app purchases and iOS requirement there is nothing between them.

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

ZDT ships an update every 25 months, Goff Performance every 29 months. The most recent releases landed on May 18, 2026 and July 20, 2026 respectively.

## The numbers

| Metric | ZDT | Goff Performance |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/goff-performance/id6476888713/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | **Every 25 months** | Every 29 months |
| Monetization | — | Free |
| Size | 48 MB | 40 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Zachariah Dodge](https://appshunter.io/developer/1705070567) | [Goff Performance LLC](https://appshunter.io/developer/1728124584) |

## What reviewers say

### ZDT

[App page](https://appshunter.io/ios/app/zdt-online/id6463812665)

**In-app purchases:** none


### Goff Performance

[App page](https://appshunter.io/ios/app/goff-performance/id6476888713)

Log your training sessions, view upcoming appointments, and track your progress. This app helps you manage your fitness journey and get the most out of your workouts.

**Highlights:** Log workouts, View scheduled workouts, Book appointments, Track progress, Workout logging

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

**In-app purchases:** none


## Frequently asked questions

### Is ZDT free?

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

### Is Goff Performance free?

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

### Which is updated more often, ZDT or Goff Performance?

ZDT ships an update every 25 months, and Goff Performance every 29 months. Most recently, ZDT was updated on May 18, 2026 and Goff Performance on July 20, 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.*