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
Memento: Modern Reminders
Memento is a modern take on everyday reminders
$5.99 · In-app purchases
PRICE
$5.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.4
313 ratings · Top 30%
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/
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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 Memento: Modern Reminders: 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
Allow users to customize reminder alerts and styles.
Assumption to check: Limited customization options for reminders
Validate with people who use this workflow before building.
Hypothesis 2
Implement recurring tasks with flexible scheduling.
Assumption to check: No recurring reminders feature
Validate with people who use this workflow before building.
Hypothesis 3
Introduce better sorting and filtering options.
Assumption to check: Difficult to manage large number of reminders
Validate with people who use this workflow before building.
Hypothesis 4
Add shared lists or reminders for team collaboration.
Assumption to check: Limited collaboration features
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
Memento is a modern take on everyday reminders. The interface is optimized to be fluid and simple, allowing you to easily keep track of what's important. You can create lists to help organize your reminders, and add time or location alerts to make sure you don't forget them. Memento can help you keep track of everything from your grocery list to your chores at home. Other Features: - Powerful notifications help you triage on the go - Force Touch shortcuts let you create a new reminder in a few taps - iMessage app lets you send reminders to friends - Widgets lets you see what's important to you at a glance - Siri support allows you to manage your reminders by talking to your favourite virtual assistant - Dark mode for use at night - Keyboard shortcuts to help you boost productivity - Automatically sync reminders via iCloud to all your devices and Apple's Reminders app - Privacy focused (no data is collected by the app) - Energy efficient (quick to launch, and won't drain your battery)
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
Expo
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Zustand
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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.
