hi, I'm tasked with commissioning a range of s'phone apps. and could do with some starter advice.

The apps each incorporate short animated sequences (3 seconds) which can be manipulated by the user (rewind/FF/pause/slow/frame step /zoom etc.). The source material is vector-based (Flash/illustrator).

Firstly, how possible is this?

What language/software would be employed?

How long would an app like this take to develop?

What should I look for in a developer?

General advice much appreciated!