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.
Access the world's largest catalogue of guitar, bass & ukulele chords, tabs, and lyrics
Free · 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 Ultimate Guitar: Chords & Tabs: 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 free content and features
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Confusing subscription options
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Ads can be intrusive
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Syncing issues with favorites across devices
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.
Access the world's largest catalogue of guitar, bass & ukulele chords, tabs, and lyrics. Challenge yourself to learn your favourite songs and more! You have choices galore: • Search for songs by genre, rating, your ability, tuning level • Explore UG Tab collections. Use the finder for your faves, fall in love with something new, feel the nostalgic vibes. Search by themes like House or Acoustic, or check out the latest album releases. Find collections based on your interests such as Star Wars or funky Bollywood beats. • Focus on guitar techniques, find songs personal to you in collections from professional guitarists • Anytime you feel inspired to share a song, create and upload your shot on the spot. It’s that easy! Share the best parts of your performance with your like minded community of fellow musicians. • Reach your true musical potential – learn to play with UG Courses here. Access over 2500 lessons for any skill level and instrument type from guitar, drums to piano and more. Learn different styles and techniques with guidance from professional musicians. Progress at your own speed and on any device, anytime, anywhere. • Play 29K+ popular songs in their original sound with Tonebridge Guitar Effects And it doesn’t end there Check out all these features: • Explore guitar, bass & ukulele chords, tabs, and lyrics for songs in every genre • Watch videos of songs to refresh your memory or use as backing tracks • Compile your favourite tabs in playlists from our tab collections • Create ‘Personal’ tabs to edit chords, lyrics or change tabs to suit your needs • Option to Switch to left-handed mode • Set a font style and size to match the tab • Offline access to favourite tabs - available at all times • Enjoy dark mode for a gig With a Pro account: • Use interactive tabs to play songs note by note, at your own pace • Select the chord variation that best suits you from the world's biggest library of chords • Use ‘Simplify’ to make difficult songs easier • Jam with high quality tabs - over 29,000 that include backing tracks and synchronised lyrics • Hit the right tempo with metronome • Transpose songs to get just the right tone for you • Take advantage of autoscroll during your practice sessions • Achieve the right sound with the built-in guitar tuner • Share, print, and export your fave songs Problems or feedback? We are always eager to improve your Tabs experience and strive for excellence in doing so. Let us help you in person by contacting our development team at [email protected], and we will endeavour to meet your needs. Please do not post bug reports or feature requests as an App Store review. Subscription information: • The "UG Pro + UG Courses + UG Sing" subscription gives you unlimited access to the app's premium content and features • The subscription price is $9.99/monthly, $59.99/yearly* • Payment will be charged to your iTunes Account at confirmation of purchase • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period • Your account will be charged for renewal within 24-hours prior to the end of the current period at the cost of the chosen package • Subscriptions may be managed, and auto-renewal may be turned off via ‘Account Settings’ on your device after purchase • There is no way to cancel your current subscription during its active period • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. * Prices are equal to the value determined by ‘Apple's App Store Matrix’ as the equivalent of the subscription price in $USD. You can read our privacy policy at https://www.ultimate-guitar.com/about/privacy.htm You can read our terms of service at https://www.ultimate-guitar.com/about/tos.htm
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.