--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Calendar Calculator Free" developer_entity: "Hiroyuki KATOH" bundle_id: "jp.37.CalendarCalculatorFree" app_store_id: "961898122" category: "Business" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2015-03-27" report_date: "2026-10-30" last_verified: "2026-10-30T00:00:00.000Z" report_version: "1.5.4" total_reviews: 1 overall_rating: 1 sentiment: "Upset" sentiment_score: 10 confidence: "medium" confidence_score: 0.45 top_complaint_theme: "The free version forces users into a calendar year that is not current, rendering the tool unusable" review_sample_size: 1 total_review_count: 1 analyzed_review_count: 1 data_age_days: 15 momentum_velocity: "zombie" intelligence_version: 2 tags: ["business", "freemium", "upset sentiment", "mobile app", "app review", "app analysis", "professionals", "individuals", "calculate"] canonical_url: "https://marlvel.ai/apps/calendar-calculator-free" license: "CC-BY-NC 4.0" content_version: "v2" --- # Calendar Calculator Free Intelligence Report ## TL;DR {#tldr} - **Category**: Business · Freemium - **Signal**: Rating 1 · Sentiment Upset - **Recent focus**: The free version forces users into a calendar year that is not current, rendering the tool unusable (top complaint) > **TL;DR:** Calendar Calculator Free is a business app by Hiroyuki KATOH, rated 1/5 by 1 users, with Upset user sentiment (10/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Calendar Calculator Free faces Upset user sentiment (1/5 from 1 review), with users reporting the free version forces users into a calendar year that is not current, rendering the tool unusable as the primary concern. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 1/5 (1 review) | | **User Mood** | Upset | | **Category** | Business | | **Developer** | Hiroyuki KATOH | | **Pricing** | Freemium | | **Platforms** | iOS | | **Confidence** | Medium (0.45/1.0) | | **Data Age** | 15d | ## Metadata & Market Performance - **Publisher:** Hiroyuki KATOH - **Category:** Business - **Target Audience:** Professionals and individuals who need to calculate specific work schedules or deadlines that deviate from standard Monday to Friday business weeks. - **Platforms:** iOS - **Version Reviewed:** 1.5.4 - **Report Date:** 2026-10-30 - **Signal Count:** 1 review analyzed - **Confidence:** Medium (0.45/1.0) - **App Store ID (iOS):** 961898122 - **Bundle ID:** jp.37.CalendarCalculatorFree - **Data Window:** Analysis based on signals collected up to 2026-10-30 ## Executive Snapshot **What it is:** Calendar Calculator Free is a business utility for iOS that calculates working and non-working days based on custom user-defined schedules. **Why users hire it:** It serves users whose work-life balance or wage calculations rely on irregular shifts that standard Monday-to-Friday business calendars cannot track. ## App DNA (Features & Intent) - **[Differentiator] Custom Calendar Calculation:** Calculates working or non-working days based on user-defined schedules rather than standard Monday to Friday tables. * *User Intent:* Users value self-expression and personalized experiences. - **[Standard] iOS Calendar Integration:** Imports existing events from system calendars to categorize them as working or non-working days. - **[Differentiator] URL Scheme Support:** Allows integration with third-party launcher apps via the jp.37.CalendarCalculator URL scheme. ## Market Position {#market-position} 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. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free trial version with 3-calendar limit and ads, Full version with no limitations - **Analysis:** 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. ## 🔴 User Sentiment (Medium Confidence: 1 of 1 review analyzed) {#user-sentiment} - **Overall Rating:** 1/5 - **Platform Split:** iOS 1.0/5 (1 ratings) - **Overall Sentiment:** Upset ### Top Complaints (Impact Areas) - **The free version forces users into a calendar year that is not current, rendering the tool unusable** ## SWOT Analysis {#swot} **Core Strengths:** - URL scheme integration enables third-party launcher workflows **Growth Levers:** - Market gap exists for custom, non-standard work-day calculators ## What's New - **Latest (v1.5.4, 11 years ago):** Resolved a compatibility issue with third-party custom keyboards. ## App Momentum (Zombie) {#momentum} - No updates in over 11 years. - Zombie status, zero active development. > **Cadence:** 1 total versions · 0 majors in last 6 months · 4234 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Calendar Calculator Free is a business app that is free with in-app purchases. It holds a 1/5 rating from 1 review. > **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. **Best for:** Professionals and individuals who need to calculate specific work schedules or deadlines that deviate from standard Monday to Friday business weeks. ### PM Action Plan (Next Best Moves) - [ ] [SUNSET] Sunset Calendar Calculator Free because the app is non-functional and has no active development team → eliminate brand drag ### Outlook: Declining 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. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 1/5 | | Total Reviews | 1 | | Sentiment | Upset (10/100) | | Confidence | Medium | | Pricing Model | Freemium | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Calendar Calculator Free** (this app) | 1/5 | Upset | Hiroyuki KATOH | | [Cisco Secure Client](https://marlvel.ai/apps/cisco-secure-client) | 3.8/5 | n/a | Cisco | | [Forane® Refrigerants Tool Belt](https://marlvel.ai/apps/forane-refrigerants-tool-belt) | 3.9/5 | Mixed | Arkema Inc. | | [Gymzee : Gym Management App](https://marlvel.ai/apps/gymzee-gym-management-app) | N/A/5 | N/A | SERVEQUE GLOBAL SERVICES PRIVATE LIMITED | | [Kube Visitor](https://marlvel.ai/apps/kube-visitor) | N/A/5 | N/A | Yardi Systems, Inc. | | [My Mobile Beauty](https://marlvel.ai/apps/my-mobile-beauty) | N/A/5 | n/a | My Mobile Beauty | ## Company Profile - **Developer:** Hiroyuki KATOH ## Data Sources & Links - **App Store ID:** 961898122 - **Sources:** Developer website content, App store metadata, User reviews. ## Related Intel Reports - [*Cisco Secure Client*](https://marlvel.ai/apps/cisco-secure-client) (Cisco) · 3.8/5 Rating - [*Forane® Refrigerants Tool Belt*](https://marlvel.ai/apps/forane-refrigerants-tool-belt) (Arkema Inc.) · 3.9/5 Rating - [*Gymzee : Gym Management App*](https://marlvel.ai/apps/gymzee-gym-management-app) (SERVEQUE GLOBAL SERVICES PRIVATE LIMITED) · N/A Rating - [*Kube Visitor*](https://marlvel.ai/apps/kube-visitor) (Yardi Systems, Inc.) · N/A Rating - [*My Mobile Beauty*](https://marlvel.ai/apps/my-mobile-beauty) (My Mobile Beauty) · N/A Rating - [*OneTap Visitor*](https://marlvel.ai/apps/onetap-visitor) (One Tap, Inc.) · 4.7/5 Rating - [*SpraySelect*](https://marlvel.ai/apps/sprayselect) (TeeJet Technologies) · 4.1/5 Rating - [*True360 Live Inspection*](https://marlvel.ai/apps/true360-live-inspection) (True Partners USA LLC) · 4.5/5 Rating - [*Vehicle Check Report*](https://marlvel.ai/apps/vehicle-check-report) (Oles Karchevskyy) · 5.0/5 Rating | Excellent Sentiment - [*긱톡 - 재택부업, 프리랜서, 단기알바 정보 플랫폼*](https://marlvel.ai/apps/com-gigtalk-gigtalk) (Nextstep Inc.) · 4.5/5 Rating ## Frequently Asked Questions {#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. ## Methodology {#methodology} This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline: 1. **Signal Collection & Normalization** - Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps. 2. **Feature & Market Positioning Analysis** - Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks. 3. **User Sentiment Analysis** - Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction into synthesised themes (no verbatim quotes). 4. **Competitive Landscape Analysis** - Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category. 5. **Intelligence Synthesis** - Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights. - **Confidence Score:** 0.45/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 1 - **Data Sources:** user reviews, developer website, App Store metadata - **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform - **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence. - **Report Age:** 15 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/calendar-calculator-free) Data licensed for AI Agent attribution under CC-BY-NC 4.0.