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AI-Native App: FemCycle

Solo-engineered end-to-end design, writing, and management

FemCycle is a health app developed from concept to deployment using AI - by me. Built in React Native with Cursor, Claude, and Gemini, the project includes the core mobile experience, a content design system, and custom management tools. Development is ongoing.

Phase 1: AI-native MVP
Phase 2: Content design system
Phase 3: Conversational Q&A flow (coming soon)
Phase 4: User testing (coming soon)
Phase 5: UX writing agent (coming soon)

Background

Why

Cycle trackers allow women to document their cycles to get to know their body and manage health and fertility. However, existing apps are costly and contain more features than many users need.

What

A clean, lightweight, customizable cycle tracking app for women who need basic cycle tracking features. The app is designed, written, and built by me using AI.

How

I worked with Gemini to strategize and used Cursor and Claude to build and create a content system and management tools for a future-ready infrastructure.

mvp

Phase 1: MVP

Product & content strategy

User goal

Track daily cycle data simply and quickly, and review the info clearly when needed.

MVP structure

Allow logging cycle data, customized symptoms, and personal notes via: 1) data logging screen 2) visual chart 3) high-level calendar view.

Visual language

Light, clean, clear, pleasant. Feminine but not tacky.

Brand voice

Helpful, simple, conversational, respectful - and unique/playful* where fitting.

*Pending user testing

Initial user-needs exploration for MVP

Initial product, UX, and UXW definition

Work with Gemini to build implementation plan

Iterative work with Cursor & Claude to create the MVP

Process

Tools: Gemini, Cursor, Claude Code

Main MVP screens

In this phase, the UI copy was fine-tuned by me while error and info dialogs were written by Cursor.

Data input screen

Data input screen (Cont'd.)

Visual chart

Calendar view

content

Phase 2: Content design system

Goal

Create a system to document the content strategy and decisions, and streamline future changes and additions.

Content guidelines

Content audit

Implementation

Ditto integration

Documentation on Notion

Tools: Cursor, Claude Code, Ditto, Notion

Process

Content guidelines

I used Claude to automatically catalog the copy in the codebase and create a voice and tone guide from scratch, which I then fine-tuned manually.

Content audit

I used Claude to review the app copy against the guidelines and flag inconsistencies, potential issues, and missing messaging. I reviewed the audit, made decisions and corrected as needed.

Some flagged terms are to be tested with users before a final decision.