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
Sign Up by SignUp.com
Organizers, swiftly schedule and manage all the people and things you care about: volunteer calendars, parent teacher conferences, event registration, potlucks, office hours, mutual aid, snack duty, tournaments, festi...
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.0
23 ratings · Below Average
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
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included18 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 Sign Up by SignUp.com: map the core Productivity 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
Provide more flexible event settings and templates.
Assumption to check: Limited customization options for events
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more organized layout with improved navigation.
Assumption to check: User interface feels cluttered
Validate with people who use this workflow before building.
Hypothesis 3
Optimize data fetching and rendering for faster performance.
Assumption to check: Performance issues with loading events
Validate with people who use this workflow before building.
Hypothesis 4
Add reminders and notifications for event deadlines.
Assumption to check: Lack of notifications for upcoming events
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
Organizers, swiftly schedule and manage all the people and things you care about: volunteer calendars, parent teacher conferences, event registration, potlucks, office hours, mutual aid, snack duty, tournaments, festivals, giving trees, cookie booths, classes, prayer circles, ushers, greeters, health clinics and so much more. If you’ve been invited to participate, you can quickly sign up, pay dues and fees, track volunteer hours, get automated reminders, sync to your phone calendar and more! (Invitation link required to participate.) SignUp supports occupancy management at your workplace, house of worship, school, HOA and municipality. Join 22 million teachers and parents, business and nonprofit leaders, community and church members, coaches and teams, volunteers, friends and coworkers who trust SignUp to save time and achieve remarkable outcomes. ∞ ∞ ∞ ∞ Easiest Way to Plan your Events & Activities! Easiest Way to Sign Up! ∞ ∞ ∞ ∞ ◆ Organizers LOVE that they can easily: · Manage volunteers and events in real-time · Plan new SignUps on-the-go · Set up a series of shifts or conference appointments · Invite participants to sign up (text, email, Social Media, Remind) ·See all their SignUps in one place · Check status to see where there are openings · Search for a participant assignments · Make new assignments and remove participants · Message participants (text, phone, email) · Edit Spot details (assignment/shift/what to bring) · Edit participant contact information · Run reports · Check-in participants at events (Premium feature) ◆ Participants LOVE that they can easily: · Sign up quickly and choose assignments with a few taps · View all their assignments & invitations in one place · Message the activity organizer (text, phone, email) · Check activity location · Make a payment or contribution · Receive automated confirmations & reminders · Sync assignments to their calendars · Invite others to join* · Accept a waiver* · Join a waitlist* · Sign up family members* · Add their own Spots to the SignUp* DOWNLOAD Sign Up by SignUp.com Today! NO APP is required to organize or participate on a SignUp. If you need us, you can always find us at [email protected] * Organizer enabled
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.
SUGGESTED BUILD STACK
React Native
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Axios
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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.
