I have to admit that is a good idea for Dirt 2.0, and i feel almost cheap to rate the app 3 stars, but there is too many problems to me:
Font can't be changed (i have a normal font, not like screenshots)
Speed doesn't appear completely (as soon as i drive faster than 100kmh, i just see 10, then 110 kmh i see 11, etc.)
you can make this app bigger or smaller, but you have to adjust height witdh together only, like a ratio (maybe it explains why i can't see 3rd number on speedometer)
Sometimes, the app loss metrics and i have to pause the game, wait 2/3 seconds to see metrics coming back
sometimes telemetry tracking force on wheels doesn't work at all on track with 208 R5.
As of now, it`s using LCDMono font, you`re probably missing it so it uses whatever the default it can get - which throws design off. Try downloading LCDMono and run again.