Hi,
I am a native English speaker and am very familiar with crowd funding sites, especially gofundme and kickstarter.
The key to a successful crowd funding campaign is proving that you are promoting a public service, rather than a narrow, self-interested business. In other words, you need to demonstrate to people that your product will play an important role in helping ordinary people in real and practical ways. I think the best way to do this is to appeal to the human side of people. People are easily motivated by emotional appeals to do the right thing for society. If you give me some information about your product, I can give you more specific details about what I would write.
Best,
Andrew