I’m not sure exactly what features Ignition relies on for mobile devices, but html5test.com/ can set a good benchmark for how capable the browser is. You also have to take into account that mobile devices have multiple browser choices.
For example just a small sample of the available big name browsers where capability may differ:
[ul]
[li]Chrome[/li]
[li]Opera Mobile[/li]
[li]Firefox[/li][/ul]