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
Do! Premium -Simple To Do List
The simplest To Do app
$20.00 · In-app purchases
PRICE
$20.00
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
238 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.
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's included19 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 Do! Premium -Simple To Do List: 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
Incorporate advanced project management tools like Gantt charts and collaboration features.
Assumption to check: Limited project management features compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Add options for setting recurring tasks.
Assumption to check: No recurring task functionality.
Validate with people who use this workflow before building.
Hypothesis 3
Implement customizable themes and appearance options for user personalization.
Assumption to check: Lack of customizable themes and appearance settings.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance search capabilities with tags and filters for better task organization.
Assumption to check: Inadequate search and filtering options.
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
The simplest To Do app Do! is a To Do app designed to help you focus on adding tasks and getting them done, without complex settings. We removed unnecessary features and kept only what makes it easy to use every day. ■ Add fast, finish instantly Add and complete tasks in the simplest way. Quick completion with a double tap. Set reminders so you don’t forget what matters. ■ Automate recurring tasks Save time by freely setting recurring tasks. Supports weekly, monthly, and yearly repeats. ■ See everything at a glance with widgets Check your tasks easily with modern, clean widgets. View today’s tasks or organize them in different ways. ■ Your data stays secure Protect your tasks with passcode or Face ID. All data is securely stored in your personal account. (Sign-up and login required) Backup and restore via Dropbox or Email. ■ Make it yours Cute themes to match your style. Multiple font options. Paper and pen–style sound effects. ■ External keyboard support. New Task (Command key + 'N') New Line (Option(Alt) key + 'Enter') Have questions or suggestions? Contact us: [email protected]
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
Zustand
React Navigation
@react-native-paper
TypeScript
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.
