This is cute but bearing in mind most of today's grandparents (at least in the West) have had decades of using computers professionally and at least a good few years using tablets and smartphones, I really think the pitch should be directed elsewhere. I especially don't think they would appreciate a 'telegram' feature! Also, I know it's not meant literally, but its genderisation as 'granny' is a really problematic cl…
Look, let me put this another way, since I'm being downvoted. I think my 70 year old mum, who is a grandma, would find it patronising and sexist to have a device pitched to her as an easier to use version of the iPad she is a bloody master of in every way. She's far more adapt than my dad, bless him, but even he can use WhatsApp and the like fine after being shown.
Maybe it's a country-by-country thing?