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
Ink: Lockscreen Calendar, Note
Never gets bored looking at your calendar again!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.0
120 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.
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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Combine features and design from your favorite apps.
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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 included17 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 Ink: Lockscreen Calendar, Note: map the core Lifestyle 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 colors, fonts, and backgrounds.
Assumption to check: Limited customization options for notes and events
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the UI by prioritizing key functionalities.
Assumption to check: Cluttered interface with too many features
Validate with people who use this workflow before building.
Hypothesis 3
Ensure a responsive design that works well on all iOS devices.
Assumption to check: Inconsistent user experience across different devices
Validate with people who use this workflow before building.
Hypothesis 4
Implement local storage to allow notes and events to be accessible offline.
Assumption to check: Lack of offline capabilities
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
Never gets bored looking at your calendar again! Turn your iPhone Lock Screen into a calendar you'll actually use. LockScreen Calendar lets you create custom wallpapers that overlay your schedule, tasks, and reminders right on your phone lockscreen - no unlocking, no app to open. Pair your own photos with clean, readable calendar layouts and build a Lock Screen that's equal parts planner and personal style. KEY FEATURES Calendar Wallpapers Overlay a calendar, agenda, or to-do list over your Lock Screen and see your day the moment you pick up your phone. Built for minimalists and planners who don't want to dig for the date. Syncs with Google Calendar, Apple Calendar Syncs with your reminders and tasks Calendar & Reminders, Built In See your month and upcoming events without leaving the app Create, edit, and remove events — set a title, date and time, repeat schedule (daily, weekly, monthly, and more), reminders, and notes Get a heads-up before anything starts (5 or 15 minutes ahead — your call); tap the notification to jump straight to your calendar Design Your Way Photos — drop in your own images as backgrounds Style — tune colors, dim levels, and whether your week starts Monday or Sunday Markers — flag "Today" with a dot, ring, or square Privacy First Your schedule is yours. Calendar data is processed right on your device — we don't collect it, store it, or track it. Download the app and monitor your schedule straight from your lockscreen. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
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Zustand
Expo
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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.
