Challenge accepted? allow use only on specific device

Hello fellow gliders,

I work with aviation companies and they want to limit their users on using only business Ipad!

They don’t want the users to be able to connect on personal phones or even personal desktop/ipad.

How can i do that? Javascript could help?

Im happy with simple solution but also more advanced data secure solution.
Like: if this device’s IP is included in this authorized list, i allow to sign in. Else not.

I will probably have a specific app domain for them already (with their branding etc) but linked tables with the public app…

Thanks in advance

Martin