We use the ultrafine particle maps created with the measurements from our mobile air pollution monitoring network to build the iOS and Android applications hRouting–The Health-Optimal Route Planner. Get it for free in the [iTunes App Store](https://itunes.apple.com/us/app/hrouting-health-optimal-route/id931299863) and [Google Play Store](https://play.google.com/store/apps/details?id=ch.ethz.tik.hrouting). The app provides urban dwellers in Zurich a health-optimal routing service. Citizens can reduce their exposure to ultrafine particles by not taking the shortest path between origin and destination but a healthier and slightly longer alternative route computed by the app.
## iPhone/iPad
The code of the iOS application is open-source and can be found on [GitHub](https://github.com/dhasenfratz/hRouting_iOS).
![](img/hroute/iPhone5_Welcome.png)
![](img/hroute/iPhone5_MyRoute.png)
![](img/hroute/iPhone5_Route.png)
![](img/hroute/iPhone5_RouteInfo.png)
![](img/hroute/iPhone5_History.png)
## Android smartphones and tablets
The code of the Android application is open-source and can be found on [GitHub](https://github.com/dhasenfratz/hRouting_Android).