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
Jack Machine Pro
Jack Machine Pro puts a Chicago house drum machine and a dedicated live performance surface on your iPhone and iPad
$9.99
PRICE
$9.99
No 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
- skills/
- 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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Quick prompt
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
Jack Machine Pro puts a Chicago house drum machine and a dedicated live performance surface on your iPhone and iPad. Build your beat in Edit mode, then switch to Performance Mode to shape a set without changing the saved pattern. THE KIT Sixteen synthesised drum voices, including kick, snare, clap, hats, toms, congas, cowbell and percussion. Shape each voice with its sound controls, level and pan, add plate reverb, and bring the kit together with the master compressor. THE GRID Program 8, 16 or 32 steps. Use accents, per-voice pattern lengths, swing and groove to give your rhythm movement. Four scenes let you cue pattern changes on the bar line. Undo edits, nudge a pattern with Mutate, or use randomisation for a new starting point. PERFORMANCE MODE — INCLUDED IN PRO Switch from editing to a live performance surface. • FILL, BUILD, BREAK and DROP shape transitions on the beat and bar line. • JACK stutters the beat; REPEAT and ROLL create rhythmic variations. • The XY pad puts master filter, drive and reverb under your fingers. • Momentary controls restore the underlying beat when released. • LOCK protects the performance surface from accidental edits. PLAY TOGETHER Ableton Link synchronises tempo and beat timing with compatible apps and devices on your local network. Scene Link coordinates scene changes with other Architect Series instruments. DJ Sync follows incoming MIDI Clock, and MIDI Learn connects controls to your MIDI controller. These optional connections stay on your local network. KEEP AND SHARE YOUR MUSIC Your patterns and settings are saved on-device. Export audio, stems and MIDI files for your production workflow, or save project files to move your work between devices. Background audio keeps the sequencer playing while you use another music app. Jack Machine and Jack Machine Pro share the same drum engine and editing tools. Performance Mode is exclusive to Pro within the Jack Machine pair. Pro is a separate purchase. No account, advertising or tracking. Time2Jack — The Architect Series. Made in Chicago.
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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.
