# DA42 TDI vs Alert Simulator

The clearest difference is price: Alert Simulator at Free against DA42 TDI's $38.99. Alert Simulator also leads on update cadence (every 2 weeks vs every 4 months). DA42 TDI's advantage is iOS requirement (9.1 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

Alert Simulator is free to download; DA42 TDI costs $38.99 up front. Neither carries in-app purchases, so what you see is what you pay.

DA42 TDI ships an update every 4 months, Alert Simulator every 2 weeks. The most recent releases landed on September 12, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | DA42 TDI | Alert Simulator |
| --- | --- | --- |
| Price | $38.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 41 MB | 4 MB |
| Requires iOS | **9.1** | 18.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Gyronimo, LLC](https://appshunter.io/developer/536898885) | [Brice Rosenzweig](https://appshunter.io/developer/315123923) |

## What reviewers say

### DA42 TDI

[App page](https://appshunter.io/ios/app/da42-tdi/id1046446776)

**Features:** macOS Compatibility

**In-app purchases:** none


### Alert Simulator

[App page](https://appshunter.io/ios/app/alert-simulator/id6739960579)

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

**In-app purchases:** none


## Frequently asked questions

### Is DA42 TDI free?

DA42 TDI costs $38.99, with no in-app purchases.

### Is Alert Simulator free?

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

### Do DA42 TDI or Alert Simulator have ads?

Neither DA42 TDI nor Alert Simulator shows ads.

### Which is updated more often, DA42 TDI or Alert Simulator?

DA42 TDI ships an update every 4 months, and Alert Simulator every 2 weeks. Most recently, DA42 TDI was updated on September 12, 2026 and Alert Simulator 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.*