In reply to bouldery bits:
Hi, I was having problems pairing the Suunto iPhone app with my Ambit 3. It now finally works! In case it is of any help to others this is what I did:
I removed the movescount app on my iPhone.
I unpaired the mobile app on the Ambit.
I removed the Ambit from the bluetooth menu on my iPhone with 'forget this device'.
Turned off bluetooth and then back on again.
I did the pairing again from scratch and it worked.
Good luck!