Sophie Terner wrote:

Hello!
I'm a representative of a young developing company in medical cosmetology. We want to launch an application + website. We have already found a developer and designer for the site. Now we are looking for a team to develop the application. The primary purpose of the application: is to show the user the benefits of using our cosmetics. The application should perform mathematical functions (some formulas we will provide, some will have to be invented). It has to have a modern design with graphs, charts, input and output fields. The application should be intuitive and work on devices based on IOS, Android, Windows, Mac

Hi
First of all, I want to point out that your idea is really cool. In today's world, any health-related thing is very popular
So, my fellow developers. Here's the company's website https://digitalho.com
You can check it out and ask any question from me or contact them (there are contacts on the site). They develop applications like: Budget impact model, Cost-effectiveness model. In general, they specialize in Value Tools for Market Access. I'm not sure if they'll be right for you, but you can try to email them anyway.