# ZDT vs Transform U Performance

ZDT and Transform U Performance are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

ZDT ships an update every 6 months, Transform U Performance every 9 months. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | ZDT | Transform U Performance |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 9 months |
| Size | 41 MB | 41 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Zachariah Dodge](https://appshunter.io/developer/1705070567) | [Transform U Performance LLC](https://appshunter.io/developer/1865728718) |

## What reviewers say

### ZDT

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

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

**In-app purchases:** none


### Transform U Performance

[App page](https://appshunter.io/ios/app/transform-u-performance/id6757274902)

**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 Transform U Performance free?

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

### Do ZDT or Transform U Performance have ads?

Neither ZDT nor Transform U Performance shows ads.

### Which is updated more often, ZDT or Transform U Performance?

ZDT ships an update every 6 months, and Transform U Performance every 9 months. Most recently, ZDT was updated on October 30, 2026 and Transform U Performance on October 28, 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.*