Can anybody recommend a cloud-based remote desktop system that is easy to access from both my laptop and my Android-based phone?

To be clear - I'm not looking for a piece of software I can install on my laptop to give me access to it, I'm looking for a cloud-based remote desktop that I can easily login from phone my phone and my laptop?

I currently use [Shadow.tech](http://Shadow.tech) but the Android-app is crap (doesn't allow me to zoom in and the keyboard covers half the screen) + half of the time the mouse goes completely unresponsive even though I can still send keyboard inputs.

I don't need anything powerful, but it *does* need to have fast download/upload speeds as my primary use case is for downloading/uploading large files because I live in a rural area without modern high-speed internet (I have Xfinity but it's old school copper and my upload is limited to 40 mb/s).

Thank you in advance for any advice!