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
DefaultSMS
Popular messaging platforms such as Telegram, WhatsApp and Signal has yet to support the new Default Apps option in Settings, which would have allowed your iPhone to automatically use these apps instead of the stock M...
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
3 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 included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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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 DefaultSMS: map the core Social Networking 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
Introduce themes and customization settings.
Assumption to check: Limited customization options for chat interface.
Validate with people who use this workflow before building.
Hypothesis 2
Implement real-time updates using WebSocket.
Assumption to check: Notification delays for incoming messages.
Validate with people who use this workflow before building.
Hypothesis 3
Add media upload capabilities with progress indicators.
Assumption to check: No support for media files in existing chats.
Validate with people who use this workflow before building.
Hypothesis 4
Implement end-to-end encryption for messages.
Assumption to check: Lack of message encryption for privacy.
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
Popular messaging platforms such as Telegram, WhatsApp and Signal has yet to support the new Default Apps option in Settings, which would have allowed your iPhone to automatically use these apps instead of the stock Messages app for sending messages or when you tap on phone numbers or message links. That's why we've made DefaultSMS - It acts as a redirector to enable you to set your Default Messaging App as Telegram, WhatsApp or Signal! When you tap on a phone number anywhere on your phone, the system will prompt you to ask if you would like to call or message. Once you've set DefaultSMS up, you can directly open your favourite messaging app, in place of the default stock Messages app, for ultimate convenience! We have also designed the app with privacy in mind, ensuring that all processes are done on device, with no phone numbers or data logged anywhere in app. It simply accepts the details that the system provides, and passing it along to the messaging app that you prefer. Setup is easy too. Simply set DefaultSMS as your default messaging app in the Settings app, and choose your desired messaging app in DefaultSMS. Note: DefaultSMS is a product made by an independent developer, and is not supported, endorsed or affiliated with WhatsApp Messenger, Telegram Messenger or Signal Messenger, in any way or form.
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.
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BUILD KIT DIFFICULTY
Starter
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.
