If you open a Doodle poll from your mobile phone, Doodle will detect your device and offer to switch to Mobile Doodle. You can directly open the Mobile Doodle version by entering http://m.doodle.com.
Even better, we recommend that you use the free Doodle app for Android or IOS:
Go here for the newest version of the iOS app.
Go here for the newest version of the Android app.