My biggest piece of advice: Don't consider the money an investment in you App. Consider it a form of encouragement to keep you thinking and working in general.

My biggest piece of advice: Don't consider the money an investment in you App. Consider it a form of encouragement to keep you thinking and working in general. Whoever gave you this money isn't expecting you to build a suicide prevention app directly. They are saying that they like your idea, they like you, and they want you to keep at it. It's a grant, not a loan so don't worry about treating it as a loan. Use it to get some training you might want, use it to set up a business and learn about business, use it to buy a piece of hardware you might otherwise not be able to afford. Use it to further your chances of eventually being able to make a difference, don't put pressure on yourself to make the absolute most of it. Lastly, put it on your resume.