App Overview

CGX icon

CGX

CGX Ltd · Health & Fitness

Build who you want to be with CGX by Caroline Girvan.

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.2
643 ratings · Top 30%

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

Make this idea yours

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

First kit free with a verified email

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Combine features and design from your favorite apps.

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What's included17 files

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

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
Preview a sample Build Kit No email needed

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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Free quick prompt For a smaller starting point

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 CGX: map the core Health & Fitness workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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App evidence

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

Screenshots

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App Store description

Build who you want to be with CGX by Caroline Girvan. CGX is a premium strength and fitness app built around exclusive, structured training programs. Every program is progressive and designed to help you build strength, improve fitness, and train with consistency over time. Inside CGX you’ll find: • Exclusive workout programs for all levels, from complete beginner to advanced • Hundreds of on-demand strength, cardio, and conditioning workouts • Clear, coached training with a strong focus on proper form and technique • Short, effective workouts that fit real life without compromising results CGX goes beyond the workout itself, supporting your training journey in a practical and sustainable way: • Instructional videos to help you train safely and confidently • Simple progress tracking and quick fitness tests • Nutritious, budget-friendly meal ideas • Evidence-based articles from Caroline and trusted industry experts Train in a way that suits your routine: • Schedule workouts and programs in your CGX calendar • Download workouts for offline training • Cast workouts to your TV with AirPlay or Chromecast • Choose Caroline’s music, no music, or your own via Apple Music or Spotify • Sync your training with Apple Health • Save favourites and track progress workout by workout • Share encouragement and tips through supportive comments under each workout • Train anywhere using the CGX website on your laptop or computer Caroline Girvan is a certified personal trainer, MNU certified nutritionist, and pre- and postnatal specialist with over a decade of experience and a global following of millions. CGX brings her proven training approach into a focused, premium platform designed for long-term progress. Build who you want to be. Cx

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

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

Implement a machine learning algorithm to suggest workouts based on user data.

Assumption to check: Lack of personalized workout recommendations

Validate with people who use this workflow before building.

Hypothesis 2

Enhance meal logging with barcode scanning and recipe suggestions.

Assumption to check: Limited nutrition tracking features

Validate with people who use this workflow before building.

Hypothesis 3

Add social sharing options and community challenges to increase engagement.

Assumption to check: No social features for user engagement

Validate with people who use this workflow before building.

Hypothesis 4

Simplify navigation and improve the layout for better user experience.

Assumption to check: Cluttered interface

Validate with people who use this workflow before building.

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
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@supabase/supabase-js
BUILD KIT DIFFICULTY
Advanced

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.