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.
Daily Scales shows you the fingering for every note of every scale
$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.
Queued for a daily kit update.
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 Daily Scales: Fingering Charts: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Daily Scales shows you the fingering for every note of every scale. Pick your instrument and a scale and press play: the music scrolls past one note at a time with the fingering over each note, the note you're on lights up, and the app plays along with you. Start with one octave of C major. When you're ready there are 35 scales, 34 arpeggios and chords, and 38 patterns to run them through, on all 40 instruments, in all twelve keys. PLAY-ALONG The same view as our fingering videos, for any scale you choose. Woodwind, brass and string players also see their instrument drawn under the music: the valves press, the slide moves, the keys close, the fingers stop the string, each as its note comes. On iPad the instrument sits under the music. Turn your iPhone on its side and the music fills the screen. AT YOUR SPEED Start as slowly as you need and turn the tempo up as the scale gets easier. Set your range once and every exercise stays inside it, so the app never asks for a note you can't play yet. THE PAGE Pick an instrument, a scale, a pattern to run it in and a rhythm to write it in, and watch the page engrave: the right clef, the right octave, the right key for what you play. Fingerings, string fingerings, slide positions and valve numbers are written on the notes, in the systems players are taught from. THE BAND Most scale practice is done against a click. Daily Scales plays a band that knows what you are reading: drums and a drone under every scale and pattern, the whole rhythm section over a tune's changes. It re-rolls itself every chorus, so it never plays the same thing twice. Tune to the drone, tap in your tempo, or have it get faster on every pass. THE KEYS Stay in one key, take the scale around the circle of fifths or fourths, or let the app pick keys at random. The band follows the key wherever it goes. ROUTINES Ready-made routines run from first one-octave scales to complete graded exam syllabuses, each with a note on what it trains. Or fill a hat with the scales and arpeggios you want and let Random Mix deal: no two sessions come out the same. YOUR TUNES Import a chord chart or screenshot the lead sheet from your own book. Daily Scales writes your scale and arpeggio patterns over the changes, voice-led from chord to chord, while the band plays the form behind you. YOUR SHEETS Set a page up the way you like it and save it to Your Sheets. Any page exports as a PDF you can send to anyone, whether or not they own the app. FOR TEACHERS Build a student a routine that goes everywhere they avoid, from one-octave scales with the fingerings written in to seventh arpeggios in 3rd inversion around the circle of fourths. Send it as an image, a PDF, or a QR code they scan into their own copy. THE INSTRUMENTS Piano, violin, viola, cello, double bass, guitar, bass guitar, ukulele, flute, piccolo, alto flute, descant and treble recorders, oboe, English horn, clarinets in B flat, A and E flat, bass clarinet, bassoon, contrabassoon, saxophones from soprano to baritone, trumpet, French horn, trombones from alto to bass, euphonium, tuba, voice in four ranges, glockenspiel, xylophone, marimba and vibraphone. Each with its own ranges, clefs and fingering systems. OFFLINE, AND YOURS Everything works offline: the engraving, the band, the import, the export. No account, no ads, no subscription, no tracking. One purchase, on every iPhone and iPad signed in to your Apple Account. Daily Scales is in English, French, German, Italian, Spanish, Portuguese, Dutch, Japanese, Korean, and Chinese (Simplified and Traditional).
Written user reviews are not shown here. Check current App Store reviews >
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 scale and chord options
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Poor user interface design
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of instructional content
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited interactivity
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.