I am planning to build a small community of testers for my mobile application, a sort of crowd-testing group for exploratory/regression testing. Does anyone have any suggestion on how to find people who would be available to test my latest release on a regular basis? since it's a health/fitness app, testers should be active (walk/run/work-outs ...). Also, what is the "standard" for rewarding the testers? is it per bug found? is it flat fee?
I'm highly torn whether or not this question is on topic or not. But the community doesn't seem to think so, so I'm not throwing my hammer at it, and I thought I'd throw an answer on it too.
The best crowd to test your app are the people who love your app. You could get people who love you, but they might be more interested in how you feel about what they say than what they actually say. It's hard to get honest feedback from them.
You could also get people who love testing. For iOS apps, there's https://www.reddit.com/r/TestFlight/ and for Android apps, there's https://www.reddit.com/r/AndroidAppTesters/ - I'm sure there are others if you root around enough. And you may have success with this, but the people who are looking to test this particular app are unlikely to be familiar with your product domain.
But what about the people who actually use your app? They might not know testing, but they will know when things don't work the way they're supposed to. And I would never suggest to abandon professional testers entirely, especially if this is a for-profit enterprise. But you can easily reward people who test with a variety of different things.
First, early access and feedback means the things they want are more likely to get attention, which might be very valuable for them or their company. Such mutually beneficial relationships are wonderful (and a primary driver of FOSS applications, in my experience.)
Second, it's amazing what users will do for a badge of recognition. Stack Exchange literally wouldn't exist without it.
And finally, some people just feel good helping out a small business/operation. Everyone loves an underdog. I remember when I was a teenager playing video games there were some people who helped me gather all my materials for a huge project. At the time I kind of thought they were suckers for all the essentially free work they did. As I got older, I realized they were just having a good time and it gave them all a reason to hang out together.