App Overview

ScaleSpace: Scales & Modes icon

ScaleSpace: Scales & Modes

Sprung Interactive · Music

ScaleSpace shows any scale on your instrument, spelled the way a musician would spell it.

$3.99 · In-app purchases

PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
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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.

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A product spec, phased build plan, differentiation notes, and screen references.

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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

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.

Screen plan

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.

Differentiate and validate

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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App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

Screenshots

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App Store description

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]

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Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

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BUILD KIT DIFFICULTY

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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.