App for keeping records of contract from abusive ex?

Sorry for x-post. Originally posted this in Chat then it occurred to me there might be a tech board.

Can anyone recommend an app to record iPhone call logs (phone and face time) and sms on a pc? There seem plenty of apps which do backup/restore but via a compressed and/or encrypted file to be put back on the phone.

I'm thinking of something which will save the messages/logs in - for example - an .xls, .doc or .csv so they can be read on pc and printed off.

Context is keeping evidence of inappropriate contact/harassment from an ex (not mine!) in case it's needed for a future custody hearing and or restraining order.