One of the biggest problems switching between an Android phone and an iPhone is that the WhatsApp chat history won't be migrated along with the switch. Here's how you can finally do it.
You can transfer your account information, profile photo, individual chats, group chats, chat history, media, and settings with the app. You can’t, however, transfer your call history or display name. Android OS Lollipop, SDK 21 or above, or Android 5 or above installed on your Android deviceWhatsApp iOS version 2.22.10.
You’ll then will need to tap Continue and select WhatsApp on the Transfer Data screen. Tap Start on your Android phone and wait for WhatsApp to prepare the data for export. You will be signed out from your Android phone once the data has been prepared. Tap Next and you should be returned to the Move to iOS app.