Calendar Calculator Free

Calendar Calculator Free

By Hiroyuki KATOH

Calendar Calculator Free is a business utility for iOS that calculates working and non-working days based on custom user-defined schedules.

The App DNA

What makes this app unique?

It serves users whose work-life balance or wage calculations rely on irregular shifts that standard Monday-to-Friday business calendars cannot track.

For Professionals and individuals who need to calculate specific work schedules or deadlines that deviate from standard Monday to Friday business weeks.

What does it look like?

Key features

Custom Calendar Calculationedge

Calculates working or non-working days based on user-defined schedules rather than standard Monday to Friday tables.

iOS Calendar Integrationstandard

Imports existing events from system calendars to categorize them as working or non-working days.

URL Scheme Supportedge

Allows integration with third-party launcher apps via the jp.37.CalendarCalculator URL scheme.

How much does it cost?

freemiumFree trial version with 3-calendar limit and adsFull version with no limitations

The freemium model relies on ad-insertion and calendar-count limits to drive upgrades, but the current broken ad-delivery mechanism prevents any revenue generation.

Velocity

Dormant developmentopaqueShow more...

Calendar Calculator Free has been inactive for 4,234 days, indicating a complete cessation of development. The single available version in the provided history focused on a minor fix for third-party keyboard compatibility. There is no evidence of ongoing maintenance, feature updates, or operational support for this application.

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Who built it?

Hiroyuki KATOH

4 apps tracked · Business

TDF CalculatorTDF CalculatorEQD CalculatorEQD CalculatorVertical Check CameraVertical Check Camera
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User Sentiment

What do users think recently?

Recent user voice shows an upset sentiment.

How are ratings & reviews evolving?

App Store
1.00 · 1

What users say, by theme

What Frustrates Users
  • The free version forces users into a calendar year that is not current, rendering the tool unusable
+ 1 more theme

1 of 1 recent reviews analyzed · limited sample

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Competition

Competitive landscape for Calendar Calculator Free

How's the Business market?

Calendar Calculator Free occupies a stagnant position in the Business category, with a 1-star rating across its total lifetime review count. The lack of updates since 2015 indicates that the app is no longer actively competing for market share in the scheduling space.

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The rivals identified

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The Analyst's Read

Key takeaways for Calendar Calculator Free

Where is it heading?

The outlook for Calendar Calculator Free is terminal, as the app has not received a functional update in over a decade. Continued reliance on broken ad-delivery mechanisms ensures that any remaining user base will churn, leaving the app as a non-viable asset.

  • The 11-year development silence confirms the app is in a permanent zombie state, which guarantees continued user frustration and churn.
  • Broken ad-loading loops prevent the core calculation feature from functioning, which renders the app useless for any potential new users.

The SWOT

Core Strengths
  • URL scheme integration enables third-party launcher workflows
Critical Frictions 3 weaknesses inside
Growth Levers
  • Market gap exists for custom, non-standard work-day calculators
Market Threats 1 threat identified

Next best moves

1 Sunset

Sunset Calendar Calculator Free because the app is non-functional and has no active development team → eliminate brand drag

The counter-intuitive read

The app's failure is not a lack of feature demand…

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Bottom line

Calendar Calculator Free is a non-functional legacy product that no longer serves its intended purpose. Sunset the app to prevent further negative brand impact, as the current broken state offers no path to recovery without a total rebuild.

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FAQ

Is Calendar Calculator Free still being updated?
No. Calendar Calculator Free has not received a functional update since March 2015, and the developer has not provided any support for the app in over 11 years.
Does Calendar Calculator Free work on current iOS versions?
Users report that the app is currently non-functional, with issues including an infinite advertisement loading loop and a calendar interface that is locked to an outdated year.
Are there alternatives to Calendar Calculator Free for scheduling?
Yes. Most users rely on standard iOS calendar apps or spreadsheet software, which offer more reliable and up-to-date scheduling features than this abandoned tool.

Sources

  1. [1] App Store

Report last updated

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Calendar Calculator Free, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Cite this report

Marlvel.ai. “Calendar Calculator Free Intelligence Report.” Updated Oct 30, 2026. https://marlvel.ai/apps/calendar-calculator-free

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