Blog
Notes on building products
Practical articles from RafayLabs on building MVPs, mobile apps, payments and AI features, written from products we have built.
- MVP
How Much Does It Cost to Build an MVP in 2026?
What actually sets the price of a startup MVP: scope, platforms, backend, integrations and who builds it. Includes the fixed costs most quotes leave out.
·6 min readRead - AI
How to Add AI to an Existing Mobile App
Seven steps to add an AI feature to an app you already have: picking the use case, keeping keys on the server, streaming, grounding answers in your data, and controlling cost.
·7 min readRead - Delivery apps
How to Build a Delivery App Like Foodpanda: Features, Tech Stack and What to Build First
A delivery app is three apps and an admin panel. Here are the features each one needs, the hard parts, the tech stack we used for GharTak, and what to leave out of version one.
·7 min readRead - Payments
How to Integrate M-Pesa STK Push in a React Native App
The full M-Pesa STK Push flow for a React Native app: access token, payment request, callback, telling the app, the errors you will hit, and going live on Daraja.
·8 min readRead