I want to build an app in ios and android.
This will make possible forecasts for stocks, e.g. stock signals app.
Every day will be informed with new stuff. It must have signup, login.
Very attractive layout.
Easy to use, integration possible.
Different sheets, e.g. stocks, options, indices, commodities.
It must have a system for recurrent subscriptions, major credit or debid cards and Paypal, Stripe, Google, Apple payment.