# TopOpt vs DTU Events

The clearest difference is update cadence: TopOpt at every 3 months against DTU Events's every 19 months. TopOpt also leads on iOS requirement (11.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

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

TopOpt ships an update every 3 months, DTU Events every 19 months. The most recent releases landed on October 6, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | TopOpt | DTU Events |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/topopt/id507454646/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 19 months |
| Monetization | Free | — |
| Size | 100 MB | 43 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DTU Mechanical Engineering](https://appshunter.io/developer/507453160) | [Info-Connect A/S](https://appshunter.io/developer/379145543) |

## What reviewers say

### TopOpt

[App page](https://appshunter.io/ios/app/topopt/id507454646)

This app allows users to perform structural optimization using topology optimization methods on their iPad or iPhone. Users can manipulate loads and supports to observe design evolution and experiment with various parameters like volume fractions and grid sizes.

**Highlights:** Topology optimization method, Structural design evolution, Load and support manipulation, Volume fraction experimentation, Grid size adjustments

**Features:** macOS Compatibility

**In-app purchases:** none


### DTU Events

[App page](https://appshunter.io/ios/app/dtu-events/id1419489895)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TopOpt free?

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

### Is DTU Events free?

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

### Do TopOpt or DTU Events have ads?

Neither TopOpt nor DTU Events shows ads.

### Which is updated more often, TopOpt or DTU Events?

TopOpt ships an update every 3 months, and DTU Events every 19 months. Most recently, TopOpt was updated on October 6, 2026 and DTU Events on October 19, 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.*