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.
Take your HIIT, Tabata, and interval training to the next level with Perfect Tabata Timer
$0.99 · 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 Perfect Tabata Timer: 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: Limited customization options for workout settings.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No social sharing features.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited analytics on workout performance.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Paywall may deter users after initial trial.
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.
Take your HIIT, Tabata, and interval training to the next level with Perfect Tabata Timer. Its bold design combines customizable workouts, Apple Watch support, and workout logging. Whether you are timing a circuit or tracking laps, every phase stays clear and every second visible. KEY FEATURES: ◉ BOLD, EASY-TO-READ TIMER • Large phase labels and a circular countdown. • Distinct visuals for Prepare, Work, Rest, Recover, and Done. • High-contrast colors, streamlined controls, and portrait or landscape support. ◉ FLEXIBLE WORKOUTS • Tabata Timer, Simple Interval Timer, and Lap Timer. • Customize Preparation, Work, Rest, and Recover durations. • Configure Intervals and Rounds. ◉ STANDARDIZED SETTINGS • Clear organization for workout structure, alerts, display, music, and presets. • Apply the Standard Tabata Workout 20/10 preset. • Save custom presets and personalize phase colors. • Keep the screen awake during training. ◉ TIMER LOG • Save completed workouts with their date, settings, and duration. • Add notes, photos, or videos to track progress. • Organize, delete, and share workout entries. ◉ AUDIO AND MUSIC • Customize sounds, volume, countdowns, and mid-interval warnings. • Select Apple Music playlists inside the app. • Keep other audio playing while timer cues remain active. ◉ APPLE WATCH • Control workouts from your wrist and receive haptic phase alerts. • Sync workout structure and timer state with iPhone. • Review completed workouts in the Timer Log. ◉ ACCESSIBLE AND PRIVATE • Supports Dynamic Type and Reduce Motion. • Phase names ensure color is never the only indicator. • No account required. Open the app and train. Perfect for HIIT, Tabata, circuits, boxing, calisthenics, strength training, yoga, stretching, and running drills. Download Perfect Tabata Timer and make every second count.
Written user reviews are not shown here. Check current App Store reviews >
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.