App Overview

iCalendar icon

iCalendar

Symfonies, Inc. · Productivity

** A MUST-HAVE CALENDAR APP FOR EVERY IPHONE, IPAD, AND IPOD **

$2.99 · In-app purchases

PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.7
5,351 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 iCalendar: 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

Introduce customizable themes and layouts.

Assumption to check: Limited customization options for event views

Validate with people who use this workflow before building.

Hypothesis 2

Implement a straightforward interface for recurring tasks.

Assumption to check: Difficulty in setting recurring reminders

Validate with people who use this workflow before building.

Hypothesis 3

Provide seamless integration with Google Calendar and Apple Calendar.

Assumption to check: Synchronization issues with external calendars

Validate with people who use this workflow before building.

Hypothesis 4

Create a more organized view for managing reminders.

Assumption to check: Cluttered interface for managing multiple reminders

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

** A MUST-HAVE CALENDAR APP FOR EVERY IPHONE, IPAD, AND IPOD **   iCalendar is the ultimate calendar for your iPhone, iPad and iPod Touch focusing on your productivity. It’s seamless, highly usable interface allows you to enter events quickly and helps you keep track of your busy schedule. It integrates with your iCloud, Google, Exchange, Outlook, or Yahoo! account to provide you with the most convenient calendaring experience.    EASILY TRACK YOUR SCHEDULE - View your daily, weekly, monthly, and yearly schedule. - Custom color-code your events. Use predefined colors, or make up your own colors. - iCalendar implements quickest way on the market to navigate between dates  - Fast and powerful search: Search events by title, location, and notes.    NEW IN VERSION 4.0 - Task Manager: Manage your tasks within your calendar in a fun and easy manner and sync with iOS Reminders. Available as in-app purchase for USD 0.99.   FULL OF PRODUCTIVITY TOOLS - Drag and drop an event to update its timing.  - Copy and paste events. - Create custom repeating events (e.g. repeat on the third Friday every month, and many more).  - Add custom alerts/reminders for events and snooze alerts - Access your event details quickly by tapping on the event.  - Customize the visible time period (e.g. from 9:00 AM – 5:00 PM) to help you focus on most important events.    EVEN MORE - Time Zone Support: View and create your events in your preferred time zone and never get confused when you travel.  - Complete print functionality. Print daily, weekly, monthly, and yearly views.  - Export any view (day, week, month, year) as a PDF file.  - Use built-in maps to set the location of your events.  - Dial into a conference call with one touch right from iCalendar. Add phone numbers from your contacts to events with the ability to use pause and wait, which is ideal for conference calls.  - Set location of an event as the address or phone number of one of your contacts.  - Access all your events directly from the Month view - no need to go to each individual day to review full list of events.  - Use the app icon badge to indicate either the number of upcoming events or the day of the month.  - Google Calendar sync: sync all of your calendars, create and edit Google Calendar events, and use Google Calendar custom reminders (SMS, email and/or alert). - Add, edit and delete calendars right from iCalendar.  - Support of portrait and landscape to match your orientation preference.  - iCalendar is a universal app. Download once and use across all your devices.  - For more details: http://www.symfonies.com/icalendar/   iCalendar offers access to interesting calendars from Calendar Store as an optional in-app purchase.  You may subscribe to your holidays calendar (national/religious) or subscribe to interesting calendars (e.g. local/global sports events, stocks, weather, and many others).   With an optional in-app purchase yearly subscription, you get full and ongoing access to the Calendar Store including (live) updates in your calendar. A subscription always starts with a one-month free trial, so you can try before you buy. One year subscriptions for the Calendar Store costs $1.99. Payment will be charged to your iTunes Account at confirmation of purchase and after the 1 month free trial. Subscriptions automatically renew 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.   Our terms of service and privacy policy are found at http://www.symfonies.com/terms-of-service/ and http://www.symfonies.com/privacy-policy/ respectively.   If you have a question, need help or would like to request a feature, please do not hesitate to contact us. We respond to EVERY email we receive: [email protected]

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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.

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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.