What is the HTC Transfer Tool application, how does it work?

According to the introduction of HTC Corporation, HTC Transfer Tool is a Tools app on the Android platform. There is currently a 6.0.1099038 version released on Nov 25, 2019, you can see the details below.

Install HTC Transfer Tool on an old phone to wirelessly move content to your new HTC phone. This simple tool uses Wi-Fi Direct to transfer your important data, like messages and photos, so it’s never been faster to effortlessly upgrade your phone.
You can transfer the following and so much more:
- Mail

- Calendars

- Messages

- Contacts and call history

- Photos and videos

- Music

- Wallpapers

- Documents

- Settings

Minimum requirements:

- Old phone: Android 2.3 Gingerbread or above. Not limited to HTC phones.

- New phone: Sense 5 or above. Limited to HTC phones.