Talking about medical web development, I pay attention to this article ?- https://www.cleveroad.com/blog/medical-web-development

Thank you very much!
I'd also recommend one more excellent article about how much does in cost to create an app like instagram

Here's a link to the post above

Definitely on-demand apps are integral part of our life. As for on-demand delivery app I recommend this post on how to create such solution - https://www.cleveroad.com/blog/on-demand-delivery-app-development-cost. There's comprehensive article which contains all you need building your own such app