I second this. Screw mobile. Literally just running this stuff on Joiplay (with renpy/rpgmaker plugin for certain games) works a million times better than the mobile versions for me, in like 9 out of 10 cases. DDLC, as well as many other Eroges and Ero VNs and such. It takes up more space, but you should just get a second device dedicated to this/make sure you have enough free space, as well as a 1 TB sd card, and as much internal storage as possible, if using just one device. Most people pay their phones off anyways by the time it's time to upgrade. And trading your phone in for a new one is pretty much a scam, or a waste at the very least, when you could just keep it and get a newer one. More space, less headache to transfer things which causes files to pile up and possibly slow down your newer phone anyway, preventing it from running at full speed.
Just my 2 cents.