Always User Journeys First!
Developers want to help but their priority will always be winning the job. Knowing enough to get good estimates will keep you from overcommitting or starting an app that won't be financially viable.
Developers will welcome well defined user journeys!
Don't contact any developers until you have your User Journeys nailed down!
Need help with your startup plan?
Payback Periods for Customer Acquisition Cost are an Important Metric for Startups
Churn Rates tell you how many customers you're losing.
Make sure you know how your data and metrics need to work together to predict success!
Do you have your app startup metrics locked down?
An app without a commercial model is just like my needy, disabled rabbit - it might look awesome but it will take all your cash to keep it alive. TechStartSMART