Cost to hire a mobile app developer from Sweden.

How about outsourcing only UI part of the code at fix price which eventually help in reducing app development cost and effort by 30-40%

I have started UI code development service at fix cost. https://uiworks.io

What I consider while developing UI code for iOS or andorid?

1. UI code which looks great on all (iPhone, iPad, Watch, Mac, Android) devices and screen sizes
2. Macro and Micro Animations
3. Orientations support
4. Dark/Light mode support
5. Localisations
6. Custom Fonts
7. Accessibility Labels
8. App intro guide pagination or tooltip/walkthrough/tutorials
9. Haptic Touch / 3D Touch
10. Support multitask mode on iPad