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
GroupMe
GroupMe - the free, simple way to stay in touch with the people who matter most.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
1,559,167 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 included19 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 GroupMe: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
GroupMe - the free, simple way to stay in touch with the people who matter most. Family. Roommates. Friends. Coworkers. Teams. Vacations. Greek Life. Bands. Faith Groups. Events. “Lifechanger.... utterly indispensable” -Gizmodo START CHATTING Add anyone to a group via their phone number or email address. If they don’t have the app, they can start chatting over SMS immediately. CONTROL NOTIFICATIONS You’re in charge! Mute specific chats, or the entire app – you can even leave or end group chats. SAY MORE THAN WORDS With an extensive set of exclusive emoji, you can express yourself in a whole new way. THE WHOLE INTERNET IN YOUR GROUP Meme images, search for and send GIFs and videos, and see content shared from URLs displayed in the chat. SHARE NOW, RELIVE LATER The gallery saves your memories. Easily explore the photos and videos shared in your group now, or later. LEAVE TEXTING BEHIND With direct messages, you can use all the features you love for group chat, but one-on-one. CHAT WHEREVER YOU ARE Including from your computer at groupme.com Stay in touch whether you’re separated by a hallway or a hemisphere. Get your group together. We want to hear your feedback! Support: https://aka.ms/groupmesupport Twitter: @GroupMeSupport Facebook: facebook.com/groupme Instagram: @GroupMe Love, Team GroupMe NOTE: SMS chat currently available in US only. Standard text messaging rates may apply. Privacy Policy: https://groupme.com/privacy Made with love in Seattle
Written user reviews are not shown here. Check current App Store reviews >
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 file sharing with cloud storage and media previews.
Assumption to check: Limited file sharing options
Validate with people who use this workflow before building.
Hypothesis 2
Enhance group management with clearer settings and admin roles.
Assumption to check: Group management can be confusing
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize notification settings for each group.
Assumption to check: Notifications are overwhelming
Validate with people who use this workflow before building.
Hypothesis 4
Optimize message loading and display for better performance.
Assumption to check: Performance issues with large groups
Validate with people who use this workflow before building.
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
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.
