No, Focus 9 doesn't provide API.
No, Focus 9 doesn't provide mobile app.
Focus 9 is located in Hyderabad, India
Focus 9 offers Quotation Based pricing model
Yes, Focus 9 can integrate with Quickbooks, Stripe Payments, PayPal, Knowlarity and many more.You can find more integration for Focus 9 here
The starting price is not disclosed by Focus 9. You can visit Focus 9 pricing page to get the latest pricing.