Figure out how well they're doing. Did you find 10 apps doing the same? Or just 1? Are they growing? Do they have lots of customers? (ie. read their blog, their

Figure out how well they're doing. Did you find 10 apps doing the same? Or just 1? Are they growing? Do they have lots of customers? (ie. read their blog, their jobs page etc.) If the market is growing, figure out how, with a less mature product (at first), you could capture a part of that. If it's not growing, they've un-validated the idea for you :)