# VBus®Touch Trainer vs ULT

The clearest difference is in-app purchases: ULT at none against VBus®Touch Trainer's 12. ULT also leads on device support (3 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. VBus®Touch Trainer sells 12 one-off in-app purchases. ULT asks for nothing beyond the download.

VBus®Touch Trainer ships an update every 7 months, ULT every 14 months. The most recent releases landed on September 24, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | VBus®Touch Trainer | ULT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 14 months |
| Size | 40 MB | 11 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [RESOL GmbH](https://appshunter.io/developer/369420321) | [Stefan Jakschik](https://appshunter.io/developer/1564456337) |

## What reviewers say

### VBus®Touch Trainer

[App page](https://appshunter.io/ios/app/vbustouch-trainer/id930456293)

**Features:** macOS Compatibility

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RESOL DeltaSol® BS/4 | $4.99 | one-time |
| RESOL DeltaTherm® E | $4.99 | one-time |
| RESOL DeltaSol® TT | $4.99 | one-time |
| RESOL DeltaSol® BX Plus | $9.99 | one-time |
| RESOL DeltaSol® BX | $9.99 | one-time |
| RESOL DeltaTherm® PV | $9.99 | one-time |
| RESOL DeltaTherm® PV MAX | $9.99 | one-time |
| RESOL DeltaTherm® HC Plus | $9.99 | one-time |
| RESOL DeltaSol® MX | $19.99 | one-time |
| RESOL DeltaTherm® HC MAX | $19.99 | one-time |
| RESOL FWR | $19.99 | one-time |
| SolarVenti SControl | $64.99 | one-time |


### ULT

[App page](https://appshunter.io/ios/app/ult-calculator/id1564456335)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VBus®Touch Trainer free?

VBus®Touch Trainer is free to download, with in-app purchases available.

### Is ULT free?

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

### Do VBus®Touch Trainer or ULT have ads?

Neither VBus®Touch Trainer nor ULT shows ads.

### Which is updated more often, VBus®Touch Trainer or ULT?

VBus®Touch Trainer ships an update every 7 months, and ULT every 14 months. Most recently, VBus®Touch Trainer was updated on September 24, 2026 and ULT on September 10, 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.*