Simple and works
I would suggest adding more ports for scanning range, and maybe profiles to group them with hostname / OS detection.
Good start though!

This utility scans your local wireless network to identify active devices and the common TCP ports they are using. It helps you audit your network for any unauthorized devices by listing all found devices.
1.4
April 19, 2019
Fixed bug where reset button wasnt clearing all the data properly, Fixed bug where default ports were not being set / saved properly in the port scan array
MoreShift8 Scan scans your local wireless network to find active devices and checks them on common TCP ports like FTP, SSH, HTTP, and RDP. It helps you identify devices connected to your network.
Yes, Shift8 Scan is completely free to download and use. There are no costs associated with its features or functionality.
No, Shift8 Scan does not contain advertisements. You can use the application without any interruptions from ads.
Shift8 Scan is available for iPhone and iPod devices. It is designed to run on iOS.
Shift8 Scan was last updated on April 19, 2019, with version 1.4. The initial release date was April 18, 2019.
Shift8 Scan has an age rating of 4+. This indicates it is suitable for users of all ages, with no content restrictions.
Shift8 Scan scans for active devices listening on common TCP ports. While it provides a comprehensive overview, it may not detect devices that are offline or not actively responding on these specific ports.
Shift8 Scan displays a list of found devices that are active on your local network. It also indicates which common TCP ports are open on these devices.