Case Studies

How We Built a Church App in 10 Days Using AI

Discover how Optiblack rapidly developed FaithReach, an AI-driven app for church growth, in just 10 days using innovative tools and a fast-paced approach.


At Optiblack, we don’t believe in overbuilding.

We believe in building fast, validating faster, and iterating based on real usage.

Recently, we worked on an early version of FaithReach — an AI-powered app designed for church growth, spiritual habits, and evangelism.

Instead of a traditional build cycle, we shipped the first version in just 10 days using:

  • Figma AI for design
  • Cursor for development

 

The Idea

FaithReach is built as:

An AI-powered system to help individuals grow in faith and help churches scale engagement

It combines:

  • Prayer & habit tracking
  • Bible reading & devotionals
  • Church attendance flows
  • Sermon insights
  • AI-powered evangelism

Our Approach

We kept it simple:

Design fast → Build fast → Test in market

1. Figma AI for Design

We used Figma AI to:

  • Generate UI flows quickly
  • Maintain a consistent design system
  • Build key journeys like onboarding, prayer, and Bible modules

No pixel-perfect obsession — just clean, usable design.

2. Cursor for Development

With Cursor, we:

  • Converted designs to code rapidly
  • Built full flows without heavy setup
  • Focused on functionality over perfection

What We Shipped in 10 Days

The first build included:

  • Onboarding & authentication
  • Prayer Journal
  • Bible & devotional module
  • Growth tracking
  • Church attendance
  • Evangelism toolkit
  • Basic AI assistant

👉 Not polished
👉 But fully usable

Why This Works for MVPs

This approach helps us:

  • Move fast — days, not months
  • Reduce cost — minimal upfront investment
  • Validate early — real user feedback
  • Iterate quickly — continuous improvements

The Trade-offs

Of course, there are trade-offs:

  • Not production-grade code
  • Some UX gaps
  • Limited scalability initially

But for an MVP, that’s acceptable.

The Optiblack Way

For early-stage products, we optimize for one thing:

Speed of learning > Perfection

Once the concept is validated, we:

  • Refine UX
  • Improve architecture
  • Scale the product properly

Final Thought

  • AI tools like Figma AI and Cursor are not just productivity hacks.
  • They’re execution accelerators — especially in the 0 → 1 phase.
  • And for FaithReach, they helped us go from idea to product in 10 days.
  • If you’re building an MVP and want to move fast — this approach works.

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