CiertoLab
Case Studies

Real products. Measurable results.

Work we've shipped for early-stage startups — from zero to production.

AI Mobile App

AI Fitness Coach — React Native

Personalized workout plans generated by GPT-4, delivered in a native mobile experience.

8 weeks
Time to launch
4.7 ★
App Store rating
62%
30-day retention

The Challenge

A fitness startup needed an app that felt like a personal trainer — adaptive, conversational, and able to generate weekly plans based on user progress.

What We Built

Built a React Native app (Expo) with a GPT-4 integration that generates and adjusts workout plans in real time. Users chat with the AI coach, log workouts, and get adaptive feedback.

Launched in 8 weeks. 4.7★ App Store rating. 62% 30-day retention.

React NativeExpoGPT-4Node.jsSupabase
LLM Integration

AI Writing Assistant — SaaS

Added AI content generation to an existing SaaS — zero downtime, 3x faster content creation.

4 weeks
Time to ship
28%
Churn reduction
71%
Feature adoption

The Challenge

A content marketing SaaS had 5,000 users but zero AI features. Competitors were shipping AI tools fast and churn was climbing.

What We Built

Integrated OpenAI with streaming responses, built a prompt management system, and added semantic search across the user's content library using pgvector.

Shipped in 4 weeks. Churn dropped 28%. AI became the #1 requested feature.

Next.jsOpenAIpgvectorStreaming APITypeScript
Full-Stack Web

B2B Marketplace — Next.js

Full marketplace with real-time messaging, payments, and AI-powered matching.

11 weeks
Time to launch
200+
Day-one users
99.9%
Uptime since launch

The Challenge

A two-sided marketplace startup had a Figma design and no code. They needed a scalable production app in under 3 months to hit their seed round milestones.

What We Built

Built the entire stack with Next.js, Prisma, and PostgreSQL. Integrated Stripe for payments, Clerk for auth, Pusher for real-time chat, and an LLM-based matching algorithm.

Shipped in 11 weeks. Used in seed round deck. 200 users on day one.

Next.jsPostgreSQLStripePusherClerkVercel
AI Mobile App

Healthcare Patient App — React Native

HIPAA-aware telemedicine app with AI triage and appointment scheduling.

10 weeks
Time to launch
1,000+
Month-one sessions
4.9 ★
Provider satisfaction

The Challenge

A digital health startup needed a patient-facing app with AI-powered symptom triage, secure messaging with providers, and appointment booking — all in one place.

What We Built

Built a React Native app with an AI triage flow (GPT-4 with medical-specific prompts), end-to-end encrypted messaging, and a real-time appointment system.

Launch in 10 weeks. Processed 1,000+ triage sessions in month one.

React NativeGPT-4Node.jsPostgreSQLWebSockets

Why founders keep coming back

We move fast

Most projects launch in 6–12 weeks. We work in tight sprints with weekly demos so you're never in the dark.

We focus on outcomes

We care about retention, conversion, and user satisfaction — not just shipping code.

We hand off cleanly

Full source code, documentation, and onboarding. Your in-house team can take over anytime.

Want results like these?

Let's talk about your project. Free 30-minute call, no commitment.

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