Good pinyin app

Audio only works with headphones, but this is fine as it helps me while reciting along with the recording of a native speaker. It would be nice to be able to choose male or female voices though.
Layout is rational and easy to use, but I would request one feature: the ability to highlight an entire column or row of sounds and listen to them recited with one or multiple tones (a, ba, ca, cha, da, etc.)
Overall a high quality pinyin app which I would recommend over others.

Abacachadafaga about Pinyin Chart - Learn Chinese