A Bangla meaning is easier to follow when the Arabic is still on the page. Quran Studio keeps both on the same ayah.
How a line is arranged
The Arabic is the Uthmani text, set right to left. The Bangla under it is Muhiuddin Khan. You do not switch books to see the other language.
Use Surahs to find a chapter by name, or start at the home shelf. Juz pages use the same ayah layout, split into the 30 parts.