I'm not sure , but if you use google chrome I think you can save certain websites as web apps . It's really easy , all you have to do is click on the three dots in the top right hand corner and click "save to desktop" or somthing like that . On mobile I mean .

Applause for trying to learn. I’d recommend YouTube for tutorials since I find visuals very helpful. The mempool open source project has their own YouTube channel and they’ve been on podcasts to talk about their work such as with Odell on Citadel Dispatch episode 101.

timechaincalendar.com