The best replacement for itunes account is apple id.

The best alternatives to itunes account are rated as following:
★★★★★  apple id
★★★★  icloud account

Your alternative for itunes account is not listed? Suggest!
Speaking about itunes account, one probably shouldn't forget about two iphones.

Other search terms related to itunes account and their ratings are:

★★★★★ two iphones
★★ multiple devices
★★ two ipods
multiple ipods
You have in mind a companion for itunes account and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of itunes account in all years. Click on graph for more.
itunes account
apple id
icloud account