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.
Accelerate your sight reading skills with instant feedback on timing accuracy
$3.99 · 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 Rhythm Sight Reading Trainer: map the core Music 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 variety of exercises
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No social features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of customization
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No feedback on exercise performance
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.
Accelerate your sight reading skills with instant feedback on timing accuracy. Our carefully graduated levels, from beginner to professional, allow you to start at your optimal skill level and progress at your own pace. You'll improve more rapidly than practicing solely on your instrument. Practice anytime and anywhere. Many advanced features. KEY FEATURES DIVERSE EXERCISES - Explore common and rare rhythms from 2 to 12 beats per bar (2/2, 3/2, 4/2, 2/4, 3/4, 4/4, 5/4, 6/4, 7/4, 3/8, 5/8, 6/8, 7/8, 9/8, 12/8). - More than 200 fixed exercises (100 (longer ones) on iPad). - Thousands of random exercises. - Suitable for absolute beginners as well as professionals. - Challenge yourself with exercises involving rests, ties, syncopations, duplets, triplets, quadruplets and quintuplets. - Add swing to quarter note meter exercises with varying degrees of swing intensity. - Automatic count-off with one or two bars. - Longer (random) exercises in landscape orientation. PRACTICE & TEST MODE - Practice mode: listen or tap along while the rhythm is played. - Test mode: hear the metronome and read/tap the rhythm. - Visual feedback instantly displays accuracy with each tap (color and position). - Easily adjust metronome tempo by sliding or keypad. - Two tap buttons for higher tempos or tapping with alternating fingers. RHYTHM EDITOR - Edit any exercise to suit your preferences. - Intuitive editor with minimal taps. - Includes an editor for ties. - Unlimited undo. - Add your exercises to favorites. - Share exercises with others. EXTRA CHALLENGES - Expert mode: higher default tempo and more accuracy required. - Endurance test (continuous reading). - Speeding-up tests. - Left- and right-hand independence: tap the beat and rhythm with two buttons. - Note duration test. - Count 6/8 in two (dotted quarter as the beat). - Ear training function for rhythmic dictation. - Maintain rhythm focus while notes from a chord progression are played. REPORTING - View a frequency chart of your tap results. - Access progress reports for fixed and random exercises. - Share your results, such as a 100% score graphic or progress reports, via email. SOUNDS - Choose from various percussive instruments for app player, metronome, and taps. - Play chord progressions with guitar, e-piano, marimba, or bass. - Optional stereo sound with taps in the right ear and metronome/player in the left ear. - Optional beat-counting voice function. MICROPHONE - Utilize the microphone for an alternative to tap buttons. - Play rhythms with hand claps, finger-snaps, or an instrument. - Adjust sensitivity settings. - Supports external microphones. MIDI - Receive taps from a Midi device connected via Apple USB camera adapter or USB-C (e.g., keyboard, guitar, drum kit). - Automatic device detection. - Touch-sensitivity support. - Export any exercise as a MIDI file. OTHER FEATURES - Experience very low latency with instant response. - Support for left-handed tapping. - Choose between classical and flat interface themes. - Support for dark mode (iOS13+). - Universal app (iPhone, iPad and iPod Touch). - Supports all screen sizes. - Tested on iOS and iPadOS 26.
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.