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.
TENDON PAIN THAT WON'T RESPOND TO REST? YOU'RE NOT ALONE — AND REST ISN'T THE ANSWER.
$1.99 · 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.
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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.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Tendon 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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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: Lack of user engagement features
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited exercise variety
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Poor progress tracking
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Weak monetization strategy
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.
TENDON PAIN THAT WON'T RESPOND TO REST? YOU'RE NOT ALONE — AND REST ISN'T THE ANSWER. Whether tendinopathy or other tendon injuries, research shows complete rest often makes things worse. Tendon Tracker helps you find the right loading balance for real recovery. Built for tendon rehab but informed by the whole kinetic chain, it helps you spot weak links (ankle, hip, core, low back) that affect tendon load. WHY TRACKING MATTERS: Morning stiffness and 24-48h pain response tell you if yesterday's load was appropriate. Track these patterns to know when to push, catch overload early, and make informed decisions. This is the same monitoring used by sports medicine professionals — now in your pocket. SMART GUIDANCE & TRACKING (Free): DAILY RECOMMENDATIONS: Every morning, get a personalized recommendation — Train, Rest, Isometrics Only, or Modify Load — with clear reasoning based on your symptoms. DAILY TRACKING: Morning stiffness & tendon strength Training sessions with intensity, duration & pain levels 24-48h pain response monitoring Recovery actions: sleep, heat, massage, sauna, protein & collagen intake Pain location tagging and session notes AUTOMATIC FLARE-UP DETECTION: If your strength drops, pain spikes, or stiffness jumps, the app detects it and applies graduated load caps (50% → 75% → 90% over 21 days) to protect you during recovery. PROGRESSION FRAMEWORK: Traffic light pain monitoring system 5-phase load management with stimulus optimization Exercise framework: Isometrics → Heavy Slow Resistance → Plyometrics → Sport Custom exercises tailored to your routine DAILY PLANNER & PROGRESS CHARTS: Plan your training day with recommended exercises for your current phase. Track morning stiffness, tendon strength, and sleep trends over time. STAY ON TRACK: Configurable morning, evening, and custom reminders. Set your own motivation anchor — record why recovery matters to you. ADVANCED FEATURES (Premium — one-time purchase): 8-REGION BODY READINESS PROFILE: Full-body assessment across ankle, knee, hamstring, hip/glute, low back, core, shoulder, and elbow — with bilateral and unilateral tests, spider chart visualization, and weakness identification. RETURN-TO-SPORT ASSESSMENT: Combines tendon health, readiness profile, and sport-specific demands into a clear Ready / Caution / Not Ready verdict with action items. TRAINING CALENDAR: Plan your week and log every session as you train — sets with reps, weight (in kg or lb), and built-in rest & hold timers. Set per-exercise goals and track your progress on a per-exercise history chart. Import or export your plan anytime. DEEP-DIVE ANALYTICS: Training Pain Impact Chart, Training Volume Chart, acute vs chronic load ratio tracking, and advanced trend analysis. COMPREHENSIVE GUIDANCE: In-depth biomechanics guidance, activity-level customization (recreational → competitive), and detailed rehabilitation scenarios. Available for all 9 supported tendons. One-time purchase — no subscriptions, lifetime access, all future premium features included. SUPPORTED TENDONS: Achilles • Patellar • Plantar Fascia • Hamstring • Rotator Cuff • Lateral Elbow • Gluteal • General YOUR DATA STAYS YOURS: All data stored locally on your device. Export to CSV anytime. WHO IT'S FOR: Runners, lifters, climbers, tennis players, weekend warriors — anyone dealing with stubborn tendon pain who's tired of guessing and ready for real progress. EVIDENCE-BASED APPROACH: Built on current tendinopathy research including Silbernagel's pain-monitoring model, Cook & Purdam's continuum model, Rio et al. isometric analgesia, and Malliaras progressive loading principles. Available in English and French. READY TO ACTUALLY HEAL? You've tried rest. You've tried random exercises from YouTube. Your app detects flare-ups before they derail you, tells you what to do each morning, and tracks your whole-body readiness for sport. Stop guessing — start recovering.
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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.