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
TimestampX: Timestamps
Convert any Unix timestamp to a readable date — and back — in a single tap
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
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 included14 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for TimestampX: Timestamps: map the core Developer Tools 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 edit timestamps and descriptions easily.
Assumption to check: Limited timestamp editing options
Validate with people who use this workflow before building.
Hypothesis 2
Implement a feature to export timestamps to various formats (CSV, PDF).
Assumption to check: No export functionality
Validate with people who use this workflow before building.
Hypothesis 3
Add reminder functionality for important timestamps.
Assumption to check: No notification reminders
Validate with people who use this workflow before building.
Hypothesis 4
Enable cloud backup of timestamps for user safety.
Assumption to check: No backup 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
Convert any Unix timestamp to a readable date — and back — in a single tap. It's the fast, fully offline epoch tool built for developers, QA engineers, and data work. — Decode any epoch value into a human date instantly, in seconds, milliseconds, microseconds, or nanoseconds — Turn any date into a Unix timestamp for the exact time zone you choose — Batch view converts a whole list of timestamps at once — Live epoch clock shows the current time in seconds and milliseconds — Reference cheat sheet for ISO 8601, RFC 3339, and strftime — One-tap copy and a running history of every conversion How it works 1. Paste a timestamp or pick a date 2. Choose your unit and time zone 3. Copy the result — it is saved to history automatically Full access requires a subscription, available weekly, yearly, or as a one-time lifetime unlock. Stop second-guessing epoch values — convert with confidence. Everything runs on device. No account, no ads, no tracking. Terms of Use: https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Support: [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
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Date-fns
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.
