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.
Good Espresso is a complete espresso engineering platform — full Bluetooth machine control, real-time extraction monitoring, automatic shot recording, ML-powered quality scoring, programmable brewing profiles, multi-b...
$9.99 · 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.
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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 Good Espresso for Decent: map the core Food & Drink workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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 coffee shop database leading to fewer choices.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of real-time updates for reviews and menu items.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No social features for sharing or recommendations.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchases may not be clearly communicated.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Good Espresso is a complete espresso engineering platform — full Bluetooth machine control, real-time extraction monitoring, automatic shot recording, ML-powered quality scoring, programmable brewing profiles, multi-brand scale integration, and a GPU-accelerated computational fluid dynamics puck simulator — all in one native Apple app. BLUETOOTH MACHINE CONTROL Connect to any Decent DE1, DE1+, DE1PRO, or DE1XL over Bluetooth LE. Start and stop espresso, steam, flush, hot water, and descale. Adjust brew and steam temperatures in real time. Upload custom pressure and flow profiles directly to the machine. Sleep, wake, and monitor state from anywhere in range. Run calibration, cleaning, and descaling routines. REAL-TIME EXTRACTION MONITORING Live pressure, flow, and temperature gauges update during every shot. A dual-axis extraction chart plots pressure and flow against time so you can watch channeling and pressure ramps as they happen. Three-point temperature tracking: group head, mix circuit, and steam boiler. Automatic shot recording captures full telemetry the moment brewing starts. 17 BREWING PROFILES + FULL EDITOR 11 espresso profiles (E61 Classic, E61 High Temperature, Lever Blooming, Turbo, Advanced Pressure, Ristretto, Slayer Style, Allonge, Dark Roast, Light Roast, Flow Adaptive) and 6 pulse-brew tea profiles (Green, Black, White, Oolong, Pu-erh, Herbal Tisane) with gongfu-style steep/pulse cycles. Build your own: up to 20 steps per profile with pressure, flow, or steep mode, per-step temperature, transition type, and exit conditions (time, weight, pressure, flow). Search, filter, favorite, duplicate. SHOT HISTORY & ANALYTICS Every extraction is saved with full data points (pressure, flow, temperature, weight), duration, dose, yield, ratio, star rating, and tasting notes. An on-device ML pipeline built on Apple's Accelerate framework (vDSP) scores each shot 0–100 across four components: pressure stability, flow consistency, temperature control, and extraction efficiency — then generates grind adjustment suggestions and channeling probability. 12 customizable analytics cards including score timeline, shot comparison, trend charts, and weekly progress. BLE SCALE INTEGRATION Auto-detects Acaia, Bookoo, Felicita, Decent, Hiroia, Timemore, Skale, and generic BLE scales. Real-time weight display with flow-rate calculation, auto-tare on shot start, and auto-stop at target weight. PUCK SIMULATION — GPU-ACCELERATED CFD (PREMIUM) A real computational fluid dynamics engine solving Darcy's law with Kozeny-Carman permeability on a 76,800-cell grid via Metal compute shaders. Full transient extraction: 80 time-steps modeling wetting fronts, puck swelling, channel formation, fines migration, and viscosity feedback. 12+ interactive parameters, 5 visualization modes, and a 3D volumetric renderer. The same porous-media physics used in hydrology and reservoir simulation — on your phone. $2.99/month with a free 7-day trial. NATIVE ON iPHONE, iPAD, AND MAC Tab bar on iPhone, sidebar on iPad and Mac. Adaptive dashboard. Drag-to-reorder tabs. Dark mode. VoiceOver accessible. Apple Watch companion. IMPORTANT: Good Espresso is independent and open-source. NOT affiliated with, endorsed by, or connected to Decent Espresso. Use at your own risk. REQUIREMENTS: • Decent espresso machine (DE1, DE1+, DE1PRO, or DE1XL) • iOS 16.0+ / macOS 14.0+ with Bluetooth LE SUBSCRIPTION: • Puck Simulation: $2.99/month with 1-week free trial • Auto-renews unless cancelled 24 hours before renewal • Manage in Settings > Subscriptions ``` ### Keywords ``` espresso, decent, CFD, puck, simulation, extraction, pressure, profiling, analytics, brewing ```
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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.
From the Build Kit assessment.
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.