iMyFone iTransor for WhatsApp - iMyfone iTransor for Whatsapp is the best transfer tool which can help you transfer Whatsapp cross-device.

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.

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.

oandbackup - Make backups of selected apps on your device and restore from those backups.

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)

SyncDroid - SyncDroid is basically and iOS and Android smartphone manager that lets the users of both smartphones to transfer their mobile content from one smartphone to another within few simple steps.