Service 05
Website + Billing Web App + Mobile App
The full stack: public website, billing and operations web app, and a mobile app for staff or customers — one system, one login, one source of truth.
- Timeline
- 6–10 weeks
- Deliverables
- 10 items
- First milestone
- Week 1
Businesses that need to sell, bill and be used on a phone
This is the tier where the software becomes the business. A site that brings enquiries, a web app where your team bills and manages them, and a mobile app for the people who are not at a desk — drivers, technicians, field staff, or your customers. Built as one system so nothing has to be re-entered anywhere.
Typical stack
What you get
Not included
- App store developer fees
- Ongoing ad spend
- Content writing
Listed as plainly as the inclusions. Anything here can be scoped on top — quoted before it starts, never assumed.
How it works
One system, three surfaces
The same data model powers the website, the billing app and the mobile app. A price changed once is changed everywhere — which is the entire argument for building them together rather than buying three tools that need reconciling.
Billing that reconciles
GST-correct invoices, credit notes, part-payments, and a payment gateway wired with idempotency and retries so a provider outage cannot double-charge or lose a transaction.
Built for patchy networks
The mobile app works in a basement, a warehouse or a village with one bar. Actions queue locally and sync when signal returns — because 'requires internet' is not a feature your field staff can work around.
Handover assumes we might leave
Documented environment variables, a seed script, a deployment runbook and a recorded walkthrough. Code in your Git organisation, apps under your store accounts.
Delivery sequence
- 01Week 1
Discovery
Data model, role matrix, and the states a record moves through. Fixed scope and price out.
- 02Week 2–5
Web app core
Billing, records and admin built first — the mobile app consumes the same API.
- 03Week 5–8
Mobile app
Built against the live API, with offline queueing and push.
- 04Week 9–10
Harden & ship
Load testing, security pass, store submission, staff training, launch with monitoring.
Sectors this usually shows up in
Full Platform FAQ
Straight answers
Including where the honest answer is 'no' or 'buy something else'.
Is ₹20,000 realistic for a website, web app and mobile app?
It is the floor, and it buys a focused single-role app on a well-defined billing flow. Realistically most platforms at this scope land between ₹45,000 and ₹1,50,000 once you count the number of user roles, the integrations and the app store work. We publish ₹20,000 as the entry point because some genuinely fit it — and we tell you within the first call if yours does not.
Native or cross-platform for the app?
React Native, so Android and iOS share one codebase and your business logic is not written twice. If a feature genuinely needs native modules we write those natively and keep the rest shared.
Which payment gateway?
Razorpay by default for India — best UPI coverage and the cleanest reconciliation API. Cashfree, PhonePe and Stripe are all supported if you have a reason to prefer one.