ZhoubaWiki:Tacho

1. Autostart android app: https://play.google.com/store/apps/details?id=com.atasoglou.autostartandstay&hl=cs
2. Tacho app: http://downloadapk.net/down_Digital-Speedometer-Free.html
3. Phone holder: https://www.czc.cz/defender-car-holder-111/139877/produkt

+ cable + bateryless HTC Chacha :-)

Chacha tacho