Hello, yes there are a lot of nice applications for math but there is a big problem : us , I mean us the humans using such a clumsy device on which you can hardly cut and paste anything or type anything, I can type on a classic keyboard about 2 times faster than hand writing, on these keyboard I can type, well 1 character per second. I made a test on one of them to compute pi, well it is about 100 times slower than 1 good computer, so what is the point ? For me it is like going back in time to the 70's when I used to do maths on a pdp-11 or on my hp-67. For me : this is not nice, I paid about 500 euros for the latest HTC device last year, someone stole it, I bought another one with the insurance I am beginning having problems with it, well I think I will go back to a portable and stupid phone and keep the math on my computer. Can someone tell us what application on these gadgets is doing a better job for mathematics than one classic computer with a 24 inch display ?? I am not convinced, sorry. Maybe on a desert island, but well, you would not last very long on batteries. ... Sincerealy, Best regards, Simon plouffe