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.
ScaleSpace shows any scale on your instrument, spelled the way a musician would spell it.
$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.
Your first Build Kit is free with a verified email.
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.
JavaScript is required to complete mailbox verification.
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Loading build analysis and prompts…
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Affiliate link: CloneChart may earn a commission at no extra cost
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
ScaleSpace shows any scale on your instrument, spelled the way a musician would spell it. Pick a key and a scale, and it appears on a guitar neck, a bass neck, a ukulele, or a piano keyboard. Hold the phone upright and the neck stands up, nut at the top. Turn it sideways and the neck lies flat across the screen. COMPARE SCALES Stack two or three scales on one neck. Each gets its own color and shape, and the notes they share split into both colors, so you can see exactly where A minor pentatonic and C major overlap. Switch to stacked view to see each one on its own neck, lined up. 24 SCALES, MODES AND ARPEGGIOS Major and minor pentatonic, major and minor blues, all seven modes of the major scale (major and natural minor among them), harmonic and melodic minor, and eleven arpeggios from triads to diminished 7, in all 12 keys. REAL POSITIONS Bass pentatonics use the classic five-box system. Guitar gets three-notes-per-string positions for 7-note scales and inversions and shapes for triads. Pick a position and the rest of the neck fades back. EVERY TUNING 6- and 7-string guitar, 4-, 5- and 6-string bass, ukulele and piano, with drop D, DADGAD, open tunings, half-step and whole-step down and more. The notes re-spell themselves to fit. SCALE FINDER Know a few notes but not the scale? Tap them in, and ScaleSpace lists every scale and arpeggio that contains them. HEAR IT, SHARE IT Tap any note to hear it. Export the chart as a clean, printable PDF and send it anywhere from the share sheet. ONE PRICE, NOTHING ELSE Pay once. No subscription, no in-app purchases, no ads. PRIVATE No account and no tracking. ScaleSpace makes no network requests, and your settings stay on your device. Made by Sprung Interactive. Questions and corrections: [email protected]
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.
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.