Install apps that are not available in the store, block ads system-wide, use custom keyboard and launcher, view files of wide selection of formats (e.g. my audi

Install apps that are not available in the store, block ads system-wide, use custom keyboard and launcher, view files of wide selection of formats (e.g. my audio files collection is in OPUS and I don't know how do I load the files to an iPhone and listen to them) and manage them the same way I do on my laptop.