App Overview

Cycle Harmony icon

Cycle Harmony

Stephen Elliott · Education

Cycle Harmony helps the people who love you understand your cycle - and show up for you in the right way, at the right time.

$2.99 · In-app purchases

PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet

Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.

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Build Kit

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A product spec, screen plans, and build steps for your coding agent.

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What's included16 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

Feature spec

Goal: Send a clear invoice after finishing a job.

  • Add a client, line items, a due date, and payment instructions.
  • Preview the total before exporting a PDF.
  • Keep an editable draft if export fails.

Screen plan

Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.

States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.

Differentiate and validate

Hypothesis: Contractors need faster repeat invoices more than more templates.

First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.

The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.

Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.

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Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for Cycle Harmony: map the core Education workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.

Hypothesis 1

Add gamification elements like achievements and streaks.

Assumption to check: Limited user engagement features

Validate with people who use this workflow before building.

Hypothesis 2

Implement more intuitive data visualization for cycle tracking.

Assumption to check: Difficulty in tracking personal health data

Validate with people who use this workflow before building.

Hypothesis 3

Create features for user discussions and Q&A.

Assumption to check: Lack of community interaction

Validate with people who use this workflow before building.

Hypothesis 4

Clearly outline features available for different subscription tiers.

Assumption to check: Unclear subscription benefits

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

Cycle Harmony helps the people who love you understand your cycle - and show up for you in the right way, at the right time. Most cycle apps are built for one person. Cycle Harmony is built for relationships. Whether you're tracking your own cycle, supporting a partner, caring for a daughter, or staying connected with a mother or sister — this app gives everyone the context they need to offer real, meaningful support. **FOR WOMEN** Track your menstrual cycle with daily entries for flow, mood, symptoms, and notes. Cycle Harmony calculates your current phase and delivers personalized guidance for every day of your cycle — from what to eat and how to care for your skin, to how your energy and emotions are likely to shift. All backed by peer-reviewed research. **FOR PARTNERS, FATHERS & FAMILY** Understand what the people you love are experiencing — not just that they're "in a phase," but what that actually means for their energy, mood, and needs. Get daily notifications that tell you exactly how to show up: what to say, what to do, and what to avoid. **FOR MEN** Men have a hormonal cycle too — a daily testosterone rhythm that affects energy, focus, mood, and performance. Cycle Harmony tracks your daily rhythm and sends time-of-day reminders aligned with your natural hormone peaks and dips. **WHAT'S INSIDE** • Phase-specific support tips, nutrition guidance, skincare routines, and meal ideas — all tailored to your current cycle phase • Science-backed content with 70+ peer-reviewed references from NIH, ACOG, WHO, and leading medical journals • Partner connection — securely share cycle data with family members • Personalized daily notifications for every profile, timed to hormonal shifts • Analytics dashboard with cycle trends, mood patterns, symptom tracking, and predictions • Multi-profile support — track and support multiple family members from one app • Complete nutrition guide with 70+ phase-specific recipes with full ingredients, substitutes, and science notes • Skincare guide with phase-specific routines, ingredient glossary, and tappable research references • Evidence & Research section with 70+ clickable studies • HealthKit integration — reads your existing Apple Health cycle data • Full data privacy — all health data stays on your device **YOUR PRIVACY MATTERS** Your health data never leaves your device. Cycle Harmony does not sell data, does not use it for advertising, and does not share it with third parties. Partner sharing is always opt-in and fully controlled by you. Cycle Harmony. Support through every phase.

Written user reviews are not shown here. Check current App Store reviews >

Screenshots

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Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

SUGGESTED BUILD STACK
React Native
Expo
Supabase
Zustand
Axios
React Navigation
BUILD KIT DIFFICULTY
Intermediate

From the Build Kit assessment.

A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.