Once connected to a device, you can do a "drill-down" discovery of the device's services, characteristics, and descriptors.
The app is designed to respect Accessibility (VoiceOver and Increased Contrast), as well as Dark Mode.
This is a 100% open-source app, with the code licensed as MIT.
It uses the BlueThoth Framework (A Bluetooth SDK), which is also 100% open-source.
The source repo for the app is: https://github.com/RiftValleySoftware/BlueVanClef
The source repo for the BlueThoth Framework is: https://github.com/RiftValleySoftware/RVS_BlueThoth
This is a page with some basic instructions for the app: https://riftvalleysoftware.com/bluevanclef#tv