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.
The Real Drum provides all the tools necessary to master the art of playing drums on your smartphone or tablet
Free
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 Real Drum: electronic drum set: 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 sound variety compared to real drum sets.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Drum pads can be unresponsive at times.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No social sharing features for users to share their music.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Ads can interrupt the experience.
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.
The Real Drum provides all the tools necessary to master the art of playing drums on your smartphone or tablet. Now you can easily play any music, anywhere! Experience the sensation of your fingers transforming into drumsticks and feel like part of a real band! What is a drum set? A drum set is a collection of drums, cymbals, and sometimes other percussion musical instruments arranged for one person to play. Why haven't you started learning to play the drums yet? The Real Drum offers various video lessons to assist you, along with a variety of loops to play along with. Don't have access to an acoustic drum set or electronic drums? No problem! The Real Drum offers a diverse range of percussion musical instruments with high-quality sounds, allowing you to play any music you desire! You don't need an acoustic drum set or electronic drums to learn to play! The Real Drum is an excellent choice for practicing or playing drums quietly, without causing disruptions or requiring much space. Enjoy the freedom to play drums wherever you like! You can customize the drum set to your liking! With complete customization freedom, you can choose the number of drum pads and cymbals, their size, and their placement on the screen. This allows for a personalized drumming experience tailored to your preferences! Show your friends how good you are at playing drums! Share your drum kits and videos of your performances with friends and on social media! The Real Drum app allows children and adults to learn drumming while having fun, enhancing their cognitive and motor skills. This drum game will stimulate your musical talent, making it easy to learn drum beats as if using a real drum kit. So what are you waiting for to become a drummer? Explore Real Drum features: - Over 100 drum lessons to learn drumming - Various drum kits, including realistic 3D drums - Customize your drum set: upload your images and sounds and create your own drum set - Wide variety of drums, cymbals, and other musical percussion instruments - Loops for playing along - Studio-quality audio - Export your recordings to MP3 format - Share your recordings and custom drum sets on social media - New drum sets, drum lessons, and loops introduced weekly - Compatible with all screen resolutions – Phones and Tablets (HD images) - MIDI support - Free app The app contains the following subscription: - Premium Version (Remove ads; Unlock all loops; Unlock all lessons and Unlock Metronome) - Monthly payment ($3,90). - Payment will be charged to iTunes Account at confirmation of purchase. - The subscription is automatically renewed unless cancelled 24 hours before the renewal. - The subsequent monthly subscriptions are automatically renewed unless cancelled 24 hours before the next renewal (considering the day of the effective monthly subscription). - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Terms of use and Privacy Policy: http://www.kolbapps.com/privacy_policy_and_terms.pdf Designed for drummers, percussionists, professional musicians, enthusiasts, and beginners! Download the Real Drum app and turn your fingers into drumsticks right now! Follow us on TikTok, Instagram, Facebook, and YouTube for tips on using the app: @kolbapps Kolb Apps: Touch & Play!
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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.