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.
The best-selling runner’s book, Chi Running®, is now an iPhone app that has helped thousands of everyday runners to run faster, easier, and injury-free
$9.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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.
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for ChiRunning: 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.
Affiliate link: CloneChart may earn a commission at no extra cost
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
Assumption to check: Limited lesson variety compared to other fitness apps.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Subscription pricing can be seen as high for casual users.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of social features can make it feel isolating.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Tracking features may not be comprehensive enough.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
The best-selling runner’s book, Chi Running®, is now an iPhone app that has helped thousands of everyday runners to run faster, easier, and injury-free. Created by ChiRunning founder, Danny Dreyer, this app is feature-laden with Chi Running video lessons, audio coaching, guided runs, and a built in metronome - tools for you to always run your best. You’ll learn the technique that has taught hundreds of thousands to run relaxed, efficiently, and with less injury. For beginning runners, weekend warriors, marathoners and speed demons alike, everyone benefits from improved running technique. You’ll practice “intelligent movement”; using good technique to save your body from undue effort and injury. Danny’s voice will talk you through Guided Runs with audio focuses played at self-selected, repeating intervals. These audio and video lessons will help you achieve your running goals; whether to start running, run a PR, complete a half or full marathon, or run for the rest of your life without injury. Practice your technique while tracking your distance, pace, caloric burn, and mapping your routes. The workout log function allows you to track your run history and share it with friends via Twitter and Facebook. Unique among running apps, the Chi Running® app is a complete coaching tool for improving your running technique and boosting your training. Exceptional running for ordinary people! COMPATIBILITY Please note: This app can only be used on the iPhone, NOT on iPads or the iPod Touch. FEATURES The Chi Running app features: • 18 video lessons of the key Chi Running focuses. • A unique Guided Run feature - Chi Run audio focuses prompt you as you run. • Pick which of the 23 Chi Run Focuses you want to practice and choose from 5 selectable time intervals. • 4 different Guided Runs to choose from: Tempo, Intervals, Long Slow Distance (LSD), and Custom. • Built-in metronome with two beat sounds. • Workout timer with pause and resume. • GPS mapping of running routes. • Running history with daily run data: distance, pace, elevation gain, calories burned. • Weekly mileage totals displayed and stored. • Video and audio reminders of 8 pre-run Body Looseners and 6 Post-run stretches. • Music fades when audio reminders play during your Guided Runs. • Separate volume settings for metronome and Chi Focuses. • Share your runs on Facebook, Twitter and more. • Track your distance in US/English or Metric units. The Chi Running App is also your portal into our world of on-line training plans, books and DVDs, and 200 Certified Chi Running instructors around the world. For questions or help with the application, send us an email to [email protected]. Check out our forum at www.ChiRunning.com/forum.
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.