Securely transfer or back up WhatsApp data across different platforms.
What to do if MobileTrans(Mac) Fails to Detect Your iTunes Backups?
Backing up, restoring, and transferring WhatsApp chats across platforms.
Google offers the "Switch to Android" app for iOS users moving to Android. Apple offers the "Move to iOS" app for Android users moving to iPhone. Both are free, secure, and officially supported.