I used to do that. I actually started with an iPod touch back in the day, then switched to an iPad/iPhone combo when iPads and the iPhone 4 came out. I miss their books app, which I still feel is the best e-reader GUI. Their books seamlessly worked between devices too, I loved reading at home with the iPad and then I could just use my phone on the train when commuting, etc.
Problem is, Apple is the greasiest company in tech, and their customer service is probably the worst in the industry, and their cost to value ratio is also probably the worst.
I had a Google Nexus 9 tablet and Iâve tried using my android phones off and on, but the Google Books app just doesnât do it for me.
A couple of years ago I wanted something a bit waterproof, so I could read on my floatie while in the pool. I ended up with a Kobo Libra Color, which I actually quite like. Itâs an extra device to cart around but itâs nice and thin, you donât notice it in a bag. I also donât commute nearly as much nowadays, so itâs less of a factor. Itâs still not the apple app, You can still side load books and itâs definitely easier on the eyes over the longer term.