Which is the easiest way to transfer contacts from IPhone to android phone?

There are plenty of ways, the one like most is to Transfer all to GMAIL-Contacts and make the same gmail account on the Android phone.

Later while using the Android phone always save new contacts in the GMAIL account, this will automatically keep a backup and will auto-populate the contacts whenever you will buy a new Android phone and setup the same Gmail account, with Contacts-Sync.

HOW TO DO IT

1. Head up to iCloud.com via your computer.
2. Select the contacts you want to save.
3. If you want to save the entire list, click the little gear button at the lower left and Select All.
4. Click the gear icon and select Export vCard .
5. Your computer will download a VCF file containing the exported contacts.

Then

1. Log in to your Google account.

2. Click on the Gmail logo, located at the top left corner of your dashboard.

3. Select contacts

4. Click the “More” dropdown menu in Contacts, and select Import.

5. Click Import again. The contacts will be automatically synced to your Android device(s), connected to this account.