App Overview

Easy Calendar icon

Easy Calendar

Tom van Zummeren · Productivity

Experience the ease of use of a weekly calendar in the palm of your hand! Designed around frequent tasks, Easy Calendar lets you create and edit events with just a few taps.

$1.99 · In-app purchases

PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.7
2,596 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.

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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 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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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 Easy Calendar: 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

Allow users to set custom notifications for different types of events.

Assumption to check: Limited customization options for event notifications

Validate with people who use this workflow before building.

Hypothesis 2

Implement a feature to set up recurring tasks.

Assumption to check: No recurring tasks feature

Validate with people who use this workflow before building.

Hypothesis 3

Implement a more organized layout with collapsible sections.

Assumption to check: Cluttered interface with too much information at once

Validate with people who use this workflow before building.

Hypothesis 4

Provide multiple themes and color customization for user preferences.

Assumption to check: Limited themes and color 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

Experience the ease of use of a weekly calendar in the palm of your hand! Designed around frequent tasks, Easy Calendar lets you create and edit events with just a few taps. Automatically syncs with your current calendar. Features • Perfect overview of the week • 100% integration with native iPhone calendar events • Synchronization with iCloud, Outlook, Google Calendar, Hotmail and other CalDAV calendars using the native iPhone features • Rotate your device to switch between one week and a three weeks view • Month view for long-term planning and to quickly jump to another week • Unique search function straight from within the week view • Innovative move/copy function that uses the week view to select a new date • Night mode - A black theme that is easier on the eye in the evening and at night! • Add sports, weather and other info to your calendar with a simple in-app purchase Customizability • Many different color themes to personalize the app! • Make the app's font bigger or smaller to your liking • Decide how much space you need for each day by customizing the week layout We appreciate your opinion and are always interested in hearing from you. Feel free to leave your feedback in the form of a review or contact us at: [email protected] Access to all available calendars for 1 year With a yearly subscription you get full and ongoing access to all available calendars including (live) updates in your calendar. A subscription always starts with a one-month free trial, so you can try before you buy. A subscription costs $1.99 per year. Payment will be charged to your iTunes Account at confirmation of purchase and after the 1 month free trial.The subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Your account will be charged for renewal within 24-hours prior to the end of the current 1 year period. You can turn off auto-renew at any time from your iTunes account settings. Cancellation of the current active subscription period is not allowed. Find the full terms and conditions, and our privacy policy, at http://easy-calendar.com/policies/terms-of-use.html and http://easy-calendar.com/policies/privacy-policy.html respectively.

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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
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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.