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
Ultimate Omer 2
Ultimate Omer 2 is the premiere sefiras ha’omer app for iPhone, iPad, and iPod touch.
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.4
16 ratings · Top 30%
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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included15 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 Ultimate Omer 2: map the core Lifestyle 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
Implement full offline mode with local storage.
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 2
Simplify and categorize settings for easier navigation.
Assumption to check: Confusing settings layout
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to add personal readings or notes.
Assumption to check: No customization options for readings
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate sharing options for daily readings or progress.
Assumption to check: Lack of social sharing features
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
Ultimate Omer 2 is the premiere sefiras ha’omer app for iPhone, iPad, and iPod touch. The first of its kind to include עלינו and change at sunset, Ultimate Omer also features a customizable local notification system, and a progress tracker, so you never have to miss again. As a universal app, Ultimate Omer features stunning presentation of the daily count - perfect for making sefira a family event. Put it on display in the living room and let the whole family count together. Ultimate Omer 2: The Sefira app you count on. --- Features: ‣ Hebrew Date Handling: The hebrew date (by which the omer is counted) begins the night before. This app uses your location to change at sunset. Sefira 3 comes with over 50 locations and can detect your location if you're not on the list. The default location is Jerusalem. ‣ Customizable Reminder: You can set a reminder daily for whatever time you like, free of charge. (If you want, you can disable the reminder too.) Don't miss a day again! ‣ Application Icon Badge: The app icon shows the current day of the עומר. Now, you don't even need to open the app - a quick glance tells you what day it is. You can now control the behavior of the badge in the Settings tab. ‣ Full Omer Text: Of course, you can tap on the app's icon and see the full text of the sefira count. This is the only Sefira app to include עלינו. Sefira 3 now supports asheknaz, sefard, and sephardic nusach. ‣ Progress Tracker: Keep track of your progress. You can mark off if you've counted with this unique progress tracker. Tap on the checkmark after you've counted. (You can tap a row to toggle if you've counted as well.) ‣ Custom Font and Line Settings: Adjust line height and font size to your liking and choose between two fonts. --- --- • Ultimate Omer 2 is #6 in Top Paid Lifestyle apps in the United States (April 4, 2023) • Ultimate Omer 2 has been featured on the Nachum Segal show. (March 14, 2012) • Ultimate Omer 2 is #2 in Top Grossing Paid Lifestyle apps in Israel (April 9, 2012) • Ultimate Omer 2 is in the top 200 grossing lifestyle apps in 9 App Stores. (April 9, 2012) Thanks for your continued support! ---
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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
Supabase
React Navigation
React Native Calendar
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.
