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.
App Overview
Aetherometer
Aetherometer puts three instruments for Earth's field in one app, ordered by scale.
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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, screen plans, and build steps for your coding agent.
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What's included
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
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- screens/
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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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
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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
Aetherometer puts three instruments for Earth's field in one app, ordered by scale. LEYLINE: In your hand Reads your phone's magnetometer and shows the local magnetic field in microtesla. Run a survey on foot and record it. Surveys can be exported as GPX. EARTHTUNE: Planet-wide Shows the Schumann resonance fundamental in hertz from the EarthTune observatory feed, and lets you listen to it. LIMEN: At the boundary Shows the magnetopause standoff distance in Earth radii. It is modeled from NOAA SWPC solar wind data using the Shue 1998 model, and the app labels it as modeled. THE BELT The home screen shows all three readings at once. Open an instrument and a bar lets you go back or jump straight to another one. A listening session keeps playing and a survey keeps recording while you look at a different instrument. HONEST BY DESIGN Each reading is marked as live, modeled, stale or sample, so a modeled value never passes for a measurement. Location is used only while a survey or its map is open, and there is no background location mode. Leaving the app pauses a survey and records a gap. Works on iPhone, iPad and iPhone Duo. One purchase, everything included. No ads, no in-app purchases, no locked features. Note: the magnetometer is built into your iPhone. Readings depend on your device's sensor and nearby metal or electronics.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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.
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.
SUGGESTED BUILD STACK
BUILD KIT DIFFICULTY
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.
