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
Jason Vale’s 3-Day Juice Diet
OVER 1 MILLION CHART-TOPPING JASON VALE APPS HAVE NOW BEEN SOLD!
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.8
5 ratings · Top 50%
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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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/
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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.
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
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Jason Vale’s 3-Day Juice Diet: map the core Food & Drink 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 user-generated content for recipes.
Assumption to check: Limited recipes and meal plans
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize juices based on preferences.
Assumption to check: No customization options for juices
Validate with people who use this workflow before building.
Hypothesis 3
Integrate social sharing and community support features.
Assumption to check: Lack of community features
Validate with people who use this workflow before building.
Hypothesis 4
Enhance shopping list with item categorization and store locations.
Assumption to check: Incomplete shopping list functionality
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
OVER 1 MILLION CHART-TOPPING JASON VALE APPS HAVE NOW BEEN SOLD! The 3 Day Juice Diet is the perfect mini health ‘service’ and a great way to reset your system to enable you to make better food choices. The tasty recipes will deliver a broad spectrum of nutrients to fuel you throughout the plan. Not only could you LOSE 3-5LBS IN 3 DAYS, but you’ll also finish feeling fully recharged! The 3-Day Juice Diet app brings to life the 3-Day Detox plan – featured in Jason Vale's successful Keeping it Simple book – and features everything you need to breeze through the plan, including: - The complete 3-Day Juice Diet plan. - Delicious juice & smoothie recipes (with videos). - Jason's tips for success. - Daily coaching videos from Jason. - Auto-generated shopping list function. - 'Life After the Plan' audio from Jason. - Reminder alerts. ***** "This app makes it so easy to follow, and I can't tell you how great you feel at the end of it!!" LINDSEYLOO8 ***** "Lost 5lbs juicing for 3 days and inspired me to carry on juicing and filling my body with healthy nutrients." CLAIRE T ABOUT JASON! Jason Vale, also known as the 'Juice Master', has sold over 6 million books, over 1 million apps, made a movie (Super Juice Me!), opened a few health retreats (www.juicemasterretreats.com) and been on a mission to Juice the World for over 20 years! "When it comes to juicing, there's only one man for the job." CAROL VORDERMAN "The King of Juicing." ALESHA DIXON “Jason Vale's approach is all about taking control of your health using common sense and logic. Always delivered with his unique humour and most importantly, easy to apply to your own life.” BEVERLY KNIGHT
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.
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BUILD KIT DIFFICULTY
Starter
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.
