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
Peptide-Tracker
PeptideTracker is a powerful personal tracking app designed to help you log, organize, and monitor your data in one place.
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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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.
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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 Peptide-Tracker: 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
Integrate with more health devices and APIs.
Assumption to check: Limited integration with health tracking devices.
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to set more personalized goals.
Assumption to check: Few options for customizing goals.
Validate with people who use this workflow before building.
Hypothesis 3
Add social sharing for achievements and progress.
Assumption to check: No social sharing features.
Validate with people who use this workflow before building.
Hypothesis 4
Provide more detailed analytics and user insights.
Assumption to check: Basic analytics and reporting.
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
PeptideTracker is a powerful personal tracking app designed to help you log, organize, and monitor your data in one place. EASY LOGGING Record entries with date, time, amount, and notes. View your complete history in a clean, organized timeline so you always know where you are. PROGRESS TRACKING Track weight, body measurements, and personal progress over time. Visual charts make it easy to see trends and stay motivated. CUSTOM TRACKING Create and manage your own routines and schedules. Stay consistent and organized with tools designed to fit your personal workflow. SMART REMINDERS Set notifications to stay on track and never miss an entry. DATA ORGANIZATION Keep everything in one place — from logs and notes to progress tracking — for a clear, structured view of your data. APPLE HEALTH INTEGRATION Sync weight, body fat, and other metrics from Apple Health for a more complete view of your progress. COMMUNITY Connect with others, share experiences, and learn from a growing community. PRIVATE & SECURE Your data is encrypted and securely stored. We do not sell or share your personal information. IMPORTANT PeptideTracker is designed for informational and personal tracking purposes only. The app does not provide medical advice, diagnosis, treatment, or dosage recommendations. Always consult a qualified healthcare professional for medical guidance.
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
Victory Native
React Navigation
BUILD KIT DIFFICULTY
Intermediate
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.
