# VBus®Touch Trainer vs Operations Diary

The clearest difference is price: VBus®Touch Trainer at Free against Operations Diary's $0.99. Operations Diary's advantage is in-app purchases (none vs 12) and update cadence (weekly vs every 7 months). On ads and iOS requirement there is nothing between them.

VBus®Touch Trainer is free to download; Operations Diary costs $0.99 up front. VBus®Touch Trainer sells 12 one-off in-app purchases. Operations Diary asks for nothing beyond the download.

VBus®Touch Trainer ships an update every 7 months, Operations Diary weekly. The most recent releases landed on September 24, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | VBus®Touch Trainer | Operations Diary |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Weekly** |
| Size | 40 MB | 32 MB |
| Requires iOS | **14.0** | 15.5 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [RESOL GmbH](https://appshunter.io/developer/369420321) | [Lars Schaefer-Dryden](https://appshunter.io/developer/642726139) |

## 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 |


### Operations Diary

[App page](https://appshunter.io/ios/app/operations-diary/id6760564390)

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

**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 Operations Diary free?

Operations Diary costs $0.99, with no in-app purchases.

### Do VBus®Touch Trainer or Operations Diary have ads?

Neither VBus®Touch Trainer nor Operations Diary shows ads.

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

VBus®Touch Trainer ships an update every 7 months, and Operations Diary weekly. Most recently, VBus®Touch Trainer was updated on September 24, 2026 and Operations Diary on September 23, 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.*