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
AF App
Experience personalized coaching designed with your goals in mind at your fingertips
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
14,701 ratings · Top 5%
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 included18 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.
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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 AF App: 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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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
Offer more diverse workout templates and custom routines.
Assumption to check: Limited exercise variety in workout plans
Validate with people who use this workflow before building.
Hypothesis 2
Enhance nutrition log with barcode scanning and recipe suggestions.
Assumption to check: Inadequate meal logging features
Validate with people who use this workflow before building.
Hypothesis 3
Implement a guided onboarding process to improve user experience.
Assumption to check: Difficult navigation for new users
Validate with people who use this workflow before building.
Hypothesis 4
Add social features for users to participate in challenges and share progress.
Assumption to check: Lack of social features for challenges
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
Experience personalized coaching designed with your goals in mind at your fingertips. The AF App offers so much more than just workouts: • Monitor your progress as you work towards your goals • Connect with Anytime Fitness Coaches virtually and get the support you need when you need it • Connect with the Anytime Fitness community and get the answers to your questions from expert coaches and members • Find practical advice and tips on everything from fitness, recovery and nutrition—and everything in between. It all starts with a plan. Answer a few questions about your goals and what’s important to you and we’ll take it from there. You’ll receive a plan including workouts, tips for making progress in your journey and weekly challenges that will move you towards your goal. Access workouts around the clock—anytime, anywhere. Our digital workouts can be done anywhere you are, helping your goals stay within reach and keep you on track wherever life takes you. You can modify your workouts by duration, location, and intensity plus you’re able to connect with a coach via video chat or messaging making your fitness journey a group effort between you and our team. Stay connected on your health journey. With the AF App you can also connect with other Anytime Fitness members and join in on the conversations that matter most to you! Interested in learning about sleep health? Want more info on active recovery? Or maybe you are looking for advice on how to get over a performance plateau—it’s all happening on the AF App. Get answers from expert coaches and members alike and prepare to be inspired by the magic that our community brings. Share your fitness stats your coaches. Connect the AF App with the Apple Health App to share your fitness stats with your coach. Now you can automatically keep your coach up-to-date on your daily activity levels, sleep, resting heart rate and more.
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
React Navigation
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.
