Best Tablet for Calculator Apps

[Hlib]

IMHO, the best option for a user with normal vision is android 6" ... 6.5". A thin body weighing no more than 150g, technology 11...14 nm, removing all unnecessary services and applications. And now, you have a normal modern calculator in your hands. I don`t like the iPhone and HP gadgets in the original design, because it is a product with unpredictable characteristics and unfair terms of use. It is easier to download a fixed version of a specific application (for example, from an honest hacker friend) than to deal with viral applications from the PlayStore/PlayMarket from HP, TI, CASIO, etc.
Edit: some insignificant typos.