iMyFone iTransor for WhatsApp - iMyfone iTransor for Whatsapp is the best transfer tool which can help you transfer Whatsapp cross-device.
Jihosoft WhatsMate - Jihosoft WhatsMate is an all-in-one WhatsApp manager for both Android & iOS users. It enables you to backup&restore WhatsApp, recover deleted WhatsApp data, and transfer WhatsApp files between Android and iPhone.
iMazing - iMazing lets you transfer music, files, messages, apps and more from any iPhone, iPad, or iPod to a computer, Mac or PC. Manage and backup your iOS device simply without iTunes. (was DiskAid)
Titanium Backup - Titanium Backup is a very old backup app that has been around since the early days of Android. In fact, it's one of the few apps that covers all versions from 1. Read more about Titanium Backup.
Syncios WhatsApp Transfer - Syncios WhatsApp Transfer is both phone to phone WhatsApp transfer and WhatsApp backup and restore tool. It not only supports to transfer WhatsApp chats iOS and Android devices, but also supports backing up your WhatsApp data to PC and restore .
WhatsApp Extractor - WhatsApp Extractor for iPhone extracts and recovers shared photos, profile photos, videos, audio notes, whatsapp chat conversations, group conversations,shared locations and whatsapp contacts from your iPhone backup.