Improve the functionality and performance of the FreeRearviewCam app with special equipment

Quite some people have a lot of  useful equipment to go with the FreeRearviewCam already at hand. That's great. For all others, maybe you get some new ideas how to improve the functionality and/ or the performance of your FreeRearviewCam with some of this equipment.
Note: these are featured links, so by clicking on them you are redirected to Amazon.

Smartphone Mounts

My favourite especially to use with trailers because it has a real wealth of different phone holding settings: the Anker dashboard and windshield phone mount

http://amzn.to/2yxMYDw

Quite useful with trailers since it features quite sophisticated settings; however it does not hold the phone very fast, so for upside-down mounting not a real recommendation: TaoTronics car mobile phone holder

http://amzn.to/2hW7re6

Electricity supply

High speed dual phone charger plugged in the cigarette lighter of your car, i.e. you can charge your front phone and back camera from a single cigarette lighter - assuming you also have the necessary charging cables (see below): Anker Power Drive Speed 2

http://amzn.to/2yyifpX

iPhone power cable 0.9m (especially suited for the front phone): http://amzn.to/2hXjeJa

iPhone power cable 1.8m (especially suited for the back camera phone): http://amzn.to/2wFyEVc

Android power cable 1m (especially suited for the front phone): http://amzn.to/2g0O579

Android power cable 2m (especially suited for the back camera phone): http://amzn.to/2g0OgPR

Lenses to improve the camera coverage

Coming up soon