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.
App Overview
RideERG
RideERG - Indoor Cycling Without Subscriptions
$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.
Build your own version
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
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included15 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.
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.
JavaScript is required to complete mailbox verification.
Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for RideERG: 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.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
< Scroll to see more >
App Store description
RideERG - Indoor Cycling Without Subscriptions RideERG is a clean, focused indoor cycling app for riders who just want to train. Connect your ERG-enabled smart trainer, choose a workout or training plan, and ride with live power targets and ERG control. After your ride, save to Apple Health, upload to Strava, or export your workout files, all without subscriptions or unnecessary complexity. Built for real training • ERG control for compatible smart trainers • Live target and actual power with cadence support • Apple Watch or external sensor heart rate support • FTP Ramp test to estimate FTP • Clear interval timing and progress Workouts and training plans RideERG includes built-in workouts and training plans to get you started, plus tools to create your own sessions. • Built-in structured workouts • Built-in training plans • Create custom workouts • Create your own training plans • Instant workout preview • Import and export RideERG workout and plan files for sharing • iCloud sync for custom workouts, plans, and user settings across your devices Clean ride experience See the metrics that matter while you ride: • Target vs actual power • Cadence and heart rate • Current and next interval • Elapsed and remaining time • Live workout graph • Quick access to trainer connections mid-ride • Simple FTP save or discard flow after FTP tests Your data, your control • Save completed workouts to Apple Health • Optionally write FTP updates to Apple Health • Upload completed rides direct to Strava by linking your account • Export ride files in TCX • Keep local ride history on your device • Export and share RideERG workout and plan files Help when you need it RideERG includes an in-app Help Guide covering setup, trainer connections, permissions, Apple Health, Strava, FTP testing, workouts, training plans, importing, exporting, and support. Designed for simplicity RideERG is built for cyclists who train indoors regularly, follow structured workouts, and want a straightforward alternative to subscription training apps. Just connect and ride. RideERG supports FTMS-compatible smart trainers, with additional support for Tacx trainers using their trainer protocol. It has been tested with Wahoo, Tacx, Wattbike, and Van Rysel hardware.
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 clear visual graphs and historical data comparison.
Assumption to check: Users often find it hard to track progress over time.
Validate with people who use this workflow before building.
Hypothesis 2
Add a prominent 'Start Workout' button on the dashboard.
Assumption to check: Difficulty in quickly starting workouts.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance integration with Apple Health and Google Fit.
Assumption to check: Limited integration with fitness devices.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify navigation and utilize more whitespace.
Assumption to check: User interface can feel cluttered.
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
Expo
Supabase
react-native-chart-kit
@react-navigation/native
expo-location
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.
