Not measly at all. Bought me Chipotle every day. But in the startup world where we hear daily about multimillion dollar deals, $25 is measly.
Looks like your apps are so much more useful than a lot of the multi-million dollar apps that get sold.
Investing that somewhere at the end of the month would definitely add up to something over a few years. (I can't figure out why everyone seems to like Chipotle so much, so I think investing might be more worthwhile)
If he was living on $600/month, that is a pretty small amount.
Does depend on which country he is in.
for example: 600$ is pretty good amount of money at month in Venezuela is even more that the minimum salary.