Yesterday from my Telegram Channel, there is a website that list all public api. I'm a sucker for API. Try to make at least one app (on Android) from the lists. One that caught my attention is Advice Slip (http://api.adviceslip.com/)
It return simple json.
advice: "You can fail at what you don't want. So you might as well take a chance on doing what you love.",
I want to use unsplash api (https://unsplash.com) as background and the text on top of image will be the advice from Advice Slip.
So here is the site : https://public-apis.xyz/ for you developer out there to make some MVP. Happy coding.