Dear god there doesn't have to be an app for everything.
Make a website and if you really want an app-like experience, make a damn PWA. No, I don't want to download your terribly optimized, huge app to get a receipt...
I'm sorry, but to get my UK ETA for traveling for work I had to download an app that I will literally use 1 time in 2 years because it is valid for 2 years. It could easily be done with a PWA.
It is not more secure, it is less secure for the end user as apps have been caught many many more times stealing data and being malware compared to a web page where you generally have to download malware.
I am actually debating getting a serial adapter for it. At my work we have an old Norma 3 phase power meter that is an unkillable beast with a very good update rate, and it only has GPIB but as we modernize, it could definitely be used to automate testing.
It was worth, in today's money, like 100k€ or something crazy.