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
Burner: Second Phone Number
Burner gives you a second phone number for calling, texting, and keeping your personal number private
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
93,758 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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included19 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.
JavaScript is required to complete mailbox verification.
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 Burner: Second Phone Number: map the core Utilities workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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
Offer more competitive pricing or bundle options.
Assumption to check: High costs for additional numbers
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to choose custom numbers or themes.
Assumption to check: Limited customization for phone numbers
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the messages interface and enhance search functionality.
Assumption to check: Confusing UI for managing messages
Validate with people who use this workflow before building.
Hypothesis 4
Optimize app performance and ensure compatibility with various devices.
Assumption to check: Inconsistent performance across devices
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
Burner gives you a second phone number for calling, texting, and keeping your personal number private. Create a number in seconds. Use it when you need it. Delete it when you don’t. HOW BURNER WORKS - Sign up and choose an area code - Call and text from your second number (Wi-Fi or mobile data required) - Delete your number anytime or create a new one CALLING & TEXTING Get a second phone number that works like your main one. Make calls and send texts without sharing your personal number. KEEP YOUR NUMBER PRIVATE Use different phone numbers for different parts of your life. Share a number when it makes sense—keep your personal one to yourself. Delete or replace numbers anytime to stop unwanted contact. STAY ORGANIZED Keep conversations separate by number so nothing gets mixed up. Customize each number and find messages quickly in a simple inbox. USE IT WHERE IT MAKES SENSE Use a second number for online marketplaces, listings, or social media—without giving out your personal number. BLOCK SPAM & UNWANTED CONTACT Block calls, filter spam texts, and mute notifications when you need a break. SET QUIET HOURS Schedule do-not-disturb times that fit your routine. Choose who can reach you—and when. PREMIUM FEATURES - VPN: Browse securely and protect your data on public Wi-Fi - Personal Info Protection: See where your info appears online and request removals - Audio Messaging: Send voice messages - Video Messaging: Share short video messages - AI Voicemail: Voicemail with transcription - Reverse Lookup: See available info about unknown numbers RECOGNIZED & TRUSTED Featured by TIME, The New York Times, WIRED, TechCrunch, Engadget, and more. PLANS & PRICING Free to download with a 3-day trial. Additional features available through subscription. - Monthly: $9.99/month - Annual: $59.99/year - Premium: $89.99/year SUBSCRIPTION DETAILS Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage subscriptions in Account Settings after purchase. IMPORTANT Calls use your existing phone service provider minutes. Trial includes limited usage. Not compatible with SMS short code services or emergency (911) calls. Available in the US and Canada (excluding Puerto Rico).
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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 Native CallKit
@react-native-async-storage/async-storage
BUILD KIT DIFFICULTY
Expert
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.
