DraStic

Hello, I have know this app and how everybody recomends it, and I plan to buy it when I have some money available, but I wanted to know if there is a way to make an external instalation (Not from google play) since my phone is really bad at conserving memory, and will install everything on the internal memory of the phone when I have an SD card available.

I would like to install it on the SD card to save some space, but if I can't, no worries then.

Sorry, this app is play store only unless you have an RPi or a Pandora/Pyra

you can install any app from the google play store onto an external SD card. a simple google search would show you how to do this. Most (if not all) would require you are running modified/rooted phones however.