App Overview

Date & Time Calculator Plus icon

Date & Time Calculator Plus

Verosocial Studio · Business

The Date and Time Calculator Plus is a fast, reliable time calculator built for professionals who need accurate time math without spreadsheets, formulas, or guesswork.

$0.99 · In-app purchases

PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.1
14 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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Combine features and design from your favorite apps.

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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.

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.

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

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for Date & Time Calculator Plus: 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

Add advanced features like time zone conversion and recurring time calculations.

Assumption to check: Limited functionality for complex time calculations.

Validate with people who use this workflow before building.

Hypothesis 2

Enhance UI to be more user-friendly with clear separation of functions.

Assumption to check: User interface can be cluttered with multiple inputs.

Validate with people who use this workflow before building.

Hypothesis 3

Implement loading indicators or animations to enhance user experience.

Assumption to check: Lack of visual feedback during calculations.

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to set preferred time formats (12h/24h) in settings.

Assumption to check: No option to customize time formats.

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 Date and Time Calculator Plus is a fast, reliable time calculator built for professionals who need accurate time math without spreadsheets, formulas, or guesswork. Whether you're calculating work hours, payroll totals, aviation time, or billing logs, this app delivers instant, precise results every time. Stop Making Costly Time Calculation Errors: Manual time math is error-prone. Mixing hours, minutes, seconds, and decimal time often leads to mistakes especially in payroll, overtime, and billing calculations. Time Calculator Plus removes that risk with a purpose-built tool designed exclusively for time calculations. Key Features • Add and subtract time instantly: Calculate hours, minutes, and seconds with professional accuracy. • Convert time formats with ease: Switch between HH:MM, decimal hours, and total minutes in seconds. • Perfect for payroll and billing: Get accurate totals for work hours, overtime, and invoices. • Persistent calculation history: Review and reuse previous calculations without re-entering data. • Clean, calculator-style interface: Designed for speed, clarity, and zero distractions. • Works fully offline: No internet required. No data tracking. Just fast results. Who Is This App For? • Freelancers, contractors, and consultants who bill by time • Payroll and accounting professionals • Aviation and transportation users • Office workers tracking work hours and overtime This app features: • Send your calculations or conversions by email • Universal App (iPhone, iPod Touch, and iPad) • Retina Display graphics • Fast app switching • Automatically Saves Your Inputs • All iPhone are supported • All iPhone screens are supported • Latest version of iOS is supported No network connectivity required.

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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
FastAPI
Axios
Moment.js
React Navigation
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.