There is one android app I was recently happy to hear about where you can read English and Pāli side by side. Easily switching between the versions, that is.
It’s called “Theravada Buddhist Texts”. It has the Pāli texts of the Suttas together with one version of the English translations. (Ven. Bhikkhu Bodhi) This is the description of the app:
“This app is meant to allow the user to read Pali Buddhist texts with side-by-side English translations, including the four main Nikāyas and the Dhp and Jataka commentaries as well as the Visuddhimagga.”