Does anyone know of an app or website that shows the height of surrounding buildings?

Google earth perhaps.

There is a New App becoming soon available called drone start. It uses maps that have elevation data to advise of your recommended RTH altitude.  

StephenGSY Posted at 2017-6-13 04:54
There is a New App becoming soon available called drone start. It uses maps that have elevation data to advise of your recommended RTH altitude.

How did you hear about the app? Do you know if there is a beta version of this?

jamesw Posted at 2017-6-14 05:50
How did you hear about the app? Do you know if there is a beta version of this?

It was in beta however its stopped beta now and being released soon I believe. https://www.faulknerlabs.io/drone-start

StephenGSY Posted at 2017-6-17 15:25
It was in beta however its stopped beta now and being released soon I believe. https://www.faulknerlabs.io/drone-start

Thanks man!

jamesw Posted at 2017-6-17 15:35
Thanks man!

No problem. I tried it during beta its is looking to be a handy little app. Even reminds you about altitude adjustment and to check home altitude when using DJI GO. It did have a few little niggles like where I live is all class D airspace. So it wouldn't let me use the apps built in auto take off. Developer told me its designed for safety so it will probably stay like that. However I did express that under certain conditions it should allow an override.
What I would like to see is DJI somehow link to live flight data, this would be a great safety feature to pre warn of anything in flight path or aircraft flying low. Had a heart pumping moment when an air search aircraft came out of nowhere and was very low thankfully the magic can climb pretty quick. A feature like that would have pre warned of this.

Is it an iOS or Android - or both - App?

Thank you.