Hello there!
I would be able to write a Eula and Privacy Policy for you just like the one at Twitter.
In fact, if you would allow me to, I would like to do a sample for you, just open chat and let me know if that's okay.
I would like to ask you before that, how many words are you expecting for Both EULA and the Privacy Policy? I asked because, Twitter had a whole lot of things to explain, so they have a whole bunch of things in there. But I am guessing your business, or I am assuming at least that for your business it shouldn't be that long, am I right? That being said, what's the name of your App may I ask?
How soon do you want this done, and how much would you be comfortable paying?
I would appreciate if you could share more details about the app, probably in a word or a text file, or maybe direct me to a website where I can read about it, thank you.
Check this project I completed on freelancer :
https://www.freelancer.com/projects/article-rewriting-editing/this-project-for-native-english/
And this one : https://www.freelancer.com/projects/content-writing/product-writing-rewrite-articles/
Do check my Portfolio here : https://www.freelancer.com/u/sputnikbound
And all my reviews : https://www.freelancer.com/u/sputnikbound#/reviews
Would be happy to do it for you, thanks.