Question [Q] Help Voice Calculator

Hi,

Need some help, trying to find a talking or voice calculator for my husband as he is blind. It needs to be a fully working speech in -speech out with as much functionality as possible (ie basic math, square, cube, root etc)

Using a Samsung SIII 4.3 upgrade, tried on google play but there are non with both actions its either in or out only.....

Thanks for any replys and suggestions posted

Aly