I am so happy to see so many great app ideas. Colour mangement is very simple and a massive improvement to apps.
Look at your colours. Look at this example, and you will improve the impression of your app.
------------------LEFT BAD --------------------------------------RIGHT GOOD------------------
Take a look here too: https://flatuicolors.com/
i use this Color Chart — HTML Color Codes
I use this for Gradients and also for Ui Ux Colors https://uigradients.com
Good but I think Material colors are much better. I prefer material colors for UI/UX colors :-Color - Material-UI and Material color TOOL to make a color perfect material UI :-Color Tool - Material Design
@Koder1331 Awesome