useful apps / iphone /android

hi l am addicted to iphone & want to ask you if theres any apps you find useful ??
l have some that l am using every day like :

Pay by Phone parking (helpful for central london) and l am using
Bike Parking Free (for solo bays)
also UK & ROI (free GPS)
Motorider (mapping your trip)

but is there anything you recommend that can make our life easyer :smiley:

Someone mentioned recently on this forum “Rain Alarm”. Been using it lately, gives me a better idea if I’ll need my waterproofs for the ride.