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
Open Cellar
Alone or linked to your desktop (PC / Mac / Linux), Open Cellar is a complete Wine Cellar software.
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.8
4 ratings · Top 50%
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Open Cellar: 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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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.
Hypothesis 1
Integrate a comprehensive wine API for better data.
Assumption to check: Limited wine database and information.
Validate with people who use this workflow before building.
Hypothesis 2
Provide clearer tier explanations and benefits.
Assumption to check: Subscription management is unclear.
Validate with people who use this workflow before building.
Hypothesis 3
Refresh design with modern aesthetics and usability.
Assumption to check: User interface may feel outdated.
Validate with people who use this workflow before building.
Hypothesis 4
Add features to share favorites and reviews with friends.
Assumption to check: No social sharing options.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Alone or linked to your desktop (PC / Mac / Linux), Open Cellar is a complete Wine Cellar software. o Deep detailed wine files All the characteristics of your wines are included within Open Cellar (year, name, label, geographical information, classification, food and wines association, peak period, temperature, comments…etc) You can: - Easily put your bottles within your virtual cases through a friendly graphical interface - Record your wine purchases and consumptions - Record your notes about your wines through specific wine tasting forms which offer more than 30 criteria The Open Cellar database includes worldwide wine countries, regions and appellations information. o Graphical screens of your cellar Through the basic functions of Open Cellar, you manually manage your bottles, with multi-touch mode possibility. o Workbook mode Visualize directly your whole wine cellar, or use the search engine process to quickly locate a specific wine file. This screen is customizable, allowing you to select the appearance of information to view through several visual combinations. o Synchronization You do not need anymore to carry your computer to your wine cellar! All information are synchronized in the 2 ways. (PC, Mac or Linux OS). o Back-up Center No one is immune to failure or crash. The backup center helps you to save or restore your cellar in a single click. o Sharing Wine Information Within few seconds, search and download thousands of wine files. o Feel free to tell us You can suggest us new features to implement within Open Cellar software. ************************* The synchronization server is available here: http://www.open-cellar.com/1033/Mobile/SynciPhone.aspx ************************
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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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.
SUGGESTED BUILD STACK
React Native
Expo
Zustand
axios
react-query
react-native-paper
BUILD KIT DIFFICULTY
Intermediate
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.
