[michelleclsun]

who is your target customer and why are they paying you? Does this save them time? Money? Make them money? Got any scenarios or customer sketches?

In addition to these questions, I'd also think about how to reach a point where customer feels a high switching costs. It seems that a service like yours can be offered by many, but the important competitive advantage is that the more customers have stored data on your service, the more 'expensive' for them to switch.

What part of your service increases in value the longer someone uses it? Is it the historical data of the customer's own app, or is it the cross-sectional data of apps in other categories? As mentioned above, mixpanel is a good example, so is new relic.