This idea that there can only be one product in an area is wrong. For example, Harvest and SimpleTimer are not the only tools in that area — Amy Hoy's Freckle m

This idea that there can only be one product in an area is wrong. For example, Harvest and SimpleTimer are not the only tools in that area — Amy Hoy's Freckle makes a pretty decent profit in the same area and with superficially the same demographic. As long as you have a unique spin on it that will resonate more with some subset of people and are willing to work your tail off, you've got a shot.