Should I file income made by sales of an app (Google/Android) as hobby income or use schedule C?

In 2015 I developed a small app for the AppStore which resulted in $140 of income. I claimed it as a hobby income on last year's tax return.

In January 2016 I released a new app and it resulted in $3,000 of income. With deductible expenses of about $200 (development software $100 and access to the Apple AppStore $99). I have not actively worked on the app since February 2016 and sales have dropped to $0 now.

I am in doubt if I should file this again as hobby income or use schedule C because of the higher income amount this new app had generated for a while. Can you give any recommendation?

Thanks