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
P-Timer
P-Timer is a timer app for use in presentations, talk, lecture, speeches, etc..
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included15 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 P-Timer: map the core Business 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 create timer presets and themes.
Assumption to check: Limited customization options for timers
Validate with people who use this workflow before building.
Hypothesis 2
Implement comprehensive timer history with statistics.
Assumption to check: No tracking of timer history
Validate with people who use this workflow before building.
Hypothesis 3
Add push notifications for timer completion.
Assumption to check: Lack of notifications or reminders
Validate with people who use this workflow before building.
Hypothesis 4
Introduce gamification elements like achievements for using timers.
Assumption to check: Limited user engagement 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
P-Timer is a timer app for use in presentations, talk, lecture, speeches, etc.. When Target time (presentation time) elapses, it will play the bell sounds "ding-dong". If Target time is exceeded, the bell can be made to automatically sound according to pre-set time (for several times, etc.). Time and the alalogue chronograph are displayed so that the remaining time can be recognized easily. Moreover, you can confirm when you executed and how long it had taken and completed by that history funcion later. Great for use in not only presentations, but for sports, studying, work, and a variety of other uses. Note : We recommend that it makes a radio waves off so that the calling may not happen in use of presentations etc.. Presentation time : 0 - 999[min] 59[sec] Presentation over time : 0 - 999[min] 59[sec] Number of histories : 1 - 200 Time display : 24[hour] or AM/PM Sound type : Bell, Gong, Chinese gong Note: the volume in the app is determined by the volume set on your device, so if the volume is too low, please increase the volume on your device.
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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BUILD KIT DIFFICULTY
Starter
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.
