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.
Most running apps track your distance.
$9.99
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.
Your first Build Kit is free with a verified email.
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 Runner's Breath: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Most running apps track your distance. Some track your pace. A few yell at you about heart rate. This one? It reminds you to breathe. You’re welcome. If you run with music, you already know the problem: your playlist is fire, your legs are working… and your breathing? Chaos. Random. Unsupervised. This app was built for runners who want to stay in control of their breathing without turning their run into a meditation retreat or a science experiment. This app helps you lock in a breathing rhythm and stick with it, even while listening to music. No staring at your watch. No awkward counting in your head. Just simple cues that help your breathing stay consistent, controlled, and efficient while you run. Because oxygen is kind of important. Why Breathing Matters Proper breathing can: • Improve endurance • Reduce fatigue • Help control your heart rate • Make runs feel easier • Keep you from sounding like a dying walrus at the 3 km mark Breathing well isn’t just for elite athletes or yoga instructors. It’s for anyone who’d like to finish a run feeling strong instead of dramatically questioning life choices. What This App Does • Guides your breathing rhythm while you run • Syncs breath cues to your real running cadence • Works alongside your music • Metronome, voice, and haptic feedback options • Requires minimal interaction once you press start • Designed specifically for runners not generic “relaxation” • Clean, simple, distraction-free interface • No ads screaming at you mid-run • No complicated setup • No fake “AI coach” yelling motivational nonsense Just you, your run, and breathing that finally makes sense. Not Running Right Now? Breathe Anyway. Breath training doesn’t stop when your shoes come off. The app also includes two guided breathing techniques for the other 23 hours of your day: Box Breathing The four-phase technique used by athletes, soldiers, and people who have to sit through very long meetings. Inhale, hold, exhale, hold — all for equal counts. Adjustable phase durations and session lengths. Great for pre-race nerves, post-run cool-downs, or pretending your inbox isn’t on fire. 4-7-8 Breathing A guided relaxation pattern built around slow, extended exhales that activate your parasympathetic nervous system — the one responsible for calm. Inhale, hold, and exhale long. Adjustable ratios including the classic 4-7-8. Ideal for recovery days, winding down, or finally falling asleep instead of replaying that awkward thing you said in 2019. Both work on iPhone and Apple Watch, with the same clean interface and audio/haptic guidance. No incense required. Who It’s For This app is perfect if you: • Run with music and lose track of breathing • Want better endurance • Struggle with pacing your breath • Feel breathless earlier than you should • Want a calmer pre-race routine or a faster post-run recovery • Want to train smarter without turning into a lab rat • Simply want running to feel easier Whether you’re new to running or deep into marathon territory, breathing control is one of the fastest ways to improve without adding mileage. Simple by Design No clutter. No nonsense. No subscriptions that cost more than your shoes. Just tap start and run like someone who knows what oxygen is for. Your legs are working hard. Your lungs deserve a plan. Used under standard Apple Terms of Use (EULA). https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of use can be found at: https://runventure.ca/terms-of-use Privacy Policy can be found here: https://runventure.ca/privacy-policy
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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: Inaccurate tracking
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Generic workout plans
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No social features
Validate with people who use this workflow before building.
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.
Not assessed in a Build Kit yet.
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.