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
Nomorobo - Robocall Blocker
Nomorobo blocks annoying robocalls, telemarketers, spam texts, and phone scammers from calling your phone
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
21,307 ratings · Top 15%
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 included17 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 Nomorobo - Robocall Blocker: map the core Utilities 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 a smarter algorithm to reduce false positives.
Assumption to check: Users report missed calls due to false positives.
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to create detailed block lists based on patterns.
Assumption to check: Limited customization options for blocking.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the subscription options and clarify benefits.
Assumption to check: Subscription model can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance customer support responsiveness and resources.
Assumption to check: Slow response time for support queries.
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
Nomorobo blocks annoying robocalls, telemarketers, spam texts, and phone scammers from calling your phone. Bring peace and quiet back to your life. Try it for free. ## 3x App Store "App of the Day" ## Featured by Apple as "New Apps We Love" ## Winner of the FTC Robocall Challenge ## PC Magazine Editor's Choice FEATURES - Real-time protection from over 10,000,000 annoying robocallers, telemarketers, and phone scammers - Over 1,500+ new robocallers identified every day - Important robocalls, like school closings and weather alerts, are able to get through - Privacy friendly - Never accesses your call logs - Block or identify robocalls (your choice) - Protection from text spam and phishing attempts - Listen to thousands of robocall messages in our database - Block "neighbor spoofed" calls. These are numbers that are very similar to yours. ## Over 1.5 BILLION robocalls stopped since 2013 ## Trusted by over 2,500,000 people every day AS SEEN IN - The New York Times - The Wall Street Journal - CBS News - NBC Nightly News - Wired - eWeek SUBSCRIPTION INFORMATION - All plans come with a free trial - Payment will be charged to your iTunes Account at confirmation of purchase. - You can cancel your subscription here: https://support.apple.com/en-us/HT202039 - Your subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. - The account will be charged for renewal within 24-hours prior to the end of the current period. - When purchasing a subscription, any unused portion of a free trial period will be forfeited. - Privacy policy & terms of use are here: https://www.nomorobo.com/pages/privacy TROUBLESHOOTING - Please don't swipe-up (aka quit) Nomorobo since it prevents us from refreshing in the background. - If you suddenly can't enable Nomorobo in Settings (it won't stay on), please delete the app, reboot your phone, and reinstall. This clears out an iOS caching issue and will get you back up and running. - Have other questions? Look here: http://support.nomorobo.com
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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
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BUILD KIT DIFFICULTY
Advanced
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.
