Rentest - Case Study

Case study React Supabase Health MVP Web App

A digital tool for running and analyzing psychological tests – inspired by Google Forms

MVP

delivered and ready for early adopters in just weeks

Digital-first

testing for psychologists and HR teams

All-in-one

survey creation, distribution, and analysis

About Rentest

Rentest is a specialized tool designed to make conducting and analyzing psychological tests simple and effective. Inspired by Google Forms, the platform allows psychologists, researchers, and HR professionals to create questionnaires, collect responses, and analyze results – all in one place.

About Personit

At Personit, we help startups and scaling businesses move from idea to real product — up to 5x faster than traditional dev teams. We specialize in low-code platforms and AI-powered development.

Challenge

The founders of Rentest wanted to:

Build a lightweight MVP that professionals could use right away
Make psychological testing faster and more digital-first
Combine survey creation, distribution, and analysis in one tool
Deliver all of this with speed, without sacrificing usability

Key Functionalities

Test creation with customizable question types

Simple sharing and distribution of tests to participants

Automatic response collection and secure storage

Analytics dashboards to visualize and interpret results

User-friendly UX inspired by Google Forms, optimized for psychological contexts

Why low-code + AI?

The project needed speed without sacrificing professional quality.

React & Supabase allowed us to:

Build the MVP fast without reinventing common flows
Integrate survey logic and analytics seamlessly
Keep the platform modular for future customizations
Ensure professionals could rely on a stable, secure tool from day one

The result: a powerful, professional tool that psychologists and HR teams can trust from day one.

React + Supabase: Fast Iteration and Scaling

Rapid MVP development with modern tech stack

Secure, scalable backend with Supabase

Modular architecture for easy future expansion

Our team has delivered over 100+ production-grade apps using technologies such as React, FlutterFlow, Bubble, Supabase, Firebase and AI-enhanced tooling. That experience allows us to go fast without cutting corners – a key differentiator in the low-code space.

The Results

MVP delivered and ready for early adopters in just weeks

Enabled psychologists and HR teams to run and analyze tests digitally

Reduced manual effort and reporting time

Solid foundation for expanding into advanced features

Our Approach

Discovery

Design

Development

QA / Iteration

Discovery Workshops

We worked with the founders to:

Define the needs of psychologists and map how they currently create, distribute, and analyze tests
Model the experience after popular form tools but tailor it to psychological use cases

Building Smart with React & Supabase

With scope locked, we:

Developed the frontend in React for a modern, responsive experience
Leveraged Supabase for rapid backend development and secure data handling
Conducted early tests with real professionals to validate flows and gather feedback

Who built it

Mikołaj

Tech Lead

Mikołaj is a Tech Lead who combines deep technical expertise with a natural talent for leading teams. His superpowers? Rapid development in its purest form – he builds scalable applications at lightning speed, never compromising on best practices and code quality. He's equally skilled at designing system architecture and inspiring teams to push beyond their limits. Thanks to the perfect balance between technical vision and operational excellence, every project under his leadership gains solid foundations and incredible delivery pace.

Paweł

Project Manager

Paweł is a master orchestrator of complex tech projects. With exceptional precision, he guides teams through every stage of delivery – from initial vision to final deployment. His superpowers include anticipating challenges before they emerge and building communication bridges between technical teams and business objectives. He combines strategic thinking with operational excellence, transforming ambitious ideas into on-time, on-budget successes.