--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Original Jewish Calendar" developer_entity: "Frank Yellin" bundle_id: "com.jewcal.app" app_store_id: "473564970" category: "Reference" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-08-04" report_date: "2026-08-26" last_verified: "2026-08-26T00:00:00.000Z" report_version: "4.0" total_reviews: 1 overall_rating: 5 sentiment: "Thrilled" sentiment_score: 85 confidence: "low" confidence_score: 0.35 top_praise_theme: "Long-term users appreciate the consistent reliability of the Jewish calendar calculations over many years of use" top_complaint_theme: "Users receive frequent system warnings about the application architecture not being optimized for modern hardware" review_sample_size: 15 total_review_count: 15 analyzed_review_count: 15 data_age_days: 36 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["reference", "free", "thrilled sentiment", "mobile app", "app review", "app analysis", "individuals", "seeking", "digital"] canonical_url: "https://marlvel.ai/apps/original-jewish-calendar" license: "CC-BY-NC 4.0" content_version: "v2" --- # Original Jewish Calendar Intelligence Report ## TL;DR {#tldr} - **Category**: Reference · Free - **Signal**: Rating 5 · Sentiment Thrilled - **Recent focus**: Users receive frequent system warnings about the application architecture not being optimized for modern hardware (top complaint) · Long-term users appreciate the consistent reliability of the Jewish calendar calculations over many years of use (top praise) > **TL;DR:** Original Jewish Calendar is a reference app by Frank Yellin, rated 5/5 by 1 users, with Thrilled user sentiment (85/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Original Jewish Calendar maintains Thrilled user sentiment (5/5 from 1 review), with users consistently praising long-term users appreciate the consistent reliability of the jewish calendar calculations over many years of use. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 5/5 (1 review) | | **User Mood** | Thrilled | | **Category** | Reference | | **Developer** | Frank Yellin | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.35/1.0) | | **Data Age** | 36d | ## Metadata & Market Performance - **Publisher:** Frank Yellin - **Category:** Reference - **Target Audience:** Individuals seeking a digital reference tool for Jewish calendar dates and holiday scheduling. - **Platforms:** iOS - **Version Reviewed:** 4.0 - **Report Date:** 2026-08-26 - **Signal Count:** 15 reviews analyzed - **Confidence:** Low (0.35/1.0) - **App Store ID (iOS):** 473564970 - **Bundle ID:** com.jewcal.app - **Performance Trend:** Improving - **Data Window:** Analysis based on signals collected up to 2026-08-26 ## Executive Snapshot **What it is:** Original Jewish Calendar is a reference utility for Gregorian and Jewish calendar date conversion on iOS. **Why users hire it:** The app removes the cognitive friction of manual date calculation for religious holiday scheduling and long-term planning. ## App DNA (Features & Intent) - **[Standard] Calendar Conversion:** Calculates dates between Gregorian and Jewish calendar systems for any date. - **[Standard] Holiday Lookup:** Displays Jewish holiday dates for current and future years. - **[Differentiator] Long-term Projection:** Provides calendar data spanning hundreds of years. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} Original Jewish Calendar maintains a 5-star rating based on a small sample of reviews, reflecting high satisfaction with its core calculation accuracy. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is distributed as a free utility with no observable monetization, subscription, or in-app purchase gates. ## 🟢 User Sentiment (Low Confidence: 15 of 15 reviews analyzed) {#user-sentiment} - **Overall Rating:** 5/5 - **Platform Split:** iOS 5.0/5 (1 ratings) - **Overall Sentiment:** Thrilled ### Top Praises - **Long-term users appreciate the consistent reliability of the Jewish calendar calculations over many years of use** - **The interface provides a functional and straightforward experience for users needing quick calendar conversions** ### Top Complaints (Impact Areas) - **Users receive frequent system warnings about the application architecture not being optimized for modern hardware** ## SWOT Analysis {#swot} **Core Strengths:** - Long-term projection capability spanning hundreds of years - Consistent calculation accuracy over a decade of use **Growth Levers:** - Adding visual themes to address top user request ## Recent Changes (v2 → v3) {#recent-changes} The developer has shifted from a maintenance-only approach to an active investment strategy, prioritizing UI theme development alongside critical architectural updates. This pivot addresses the primary user request for aesthetic customization while acknowledging the existential risk posed by aging hardware compatibility. **Overall trend**: Improving **Compared at**: 2026-08-26 ### High-impact changes - **[Shifted] PM Action Item prioritization** (positioning) ### Medium-impact changes - **[Added] Formalized UI customization opportunity** (swot) - **[Shifted] Elevated threat assessment** (swot) ## App Momentum (Maintenance) {#momentum} - Ships bug fixes at 3-week cadence. - No new feature builds recently. > **Cadence:** 1 total versions · 0 majors in last 6 months · 21 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Original Jewish Calendar is a market-leading reference app that is completely free. With a 5/5 rating from 1 review, it delivers strong user satisfaction. > **Bottom Line:** Original Jewish Calendar maintains a loyal user base through calculation accuracy, but the lack of native hardware optimization risks future compatibility and churn. Addressing the system warnings is the priority to preserve the utility's long-term viability. **Best for:** Individuals seeking a digital reference tool for Jewish calendar dates and holiday scheduling. ### PM Action Plan (Next Best Moves) - [ ] [MAINTAIN] Audit application architecture for modern hardware compatibility because system warnings are the top complaint theme → reduce churn risk ### Outlook: Stable The reference utility market for niche calendar tools remains stable, but Original Jewish Calendar faces an existential risk from its aging architecture. The PM must prioritize hardware compatibility to ensure the app remains functional as OS requirements evolve, otherwise the current loyalty will shift to more modern alternatives. - 🔴 System architecture warnings in the latest release erode user confidence, signaling a risk of abandonment if hardware compatibility is not addressed. - 🟢 High user satisfaction with calculation accuracy over a decade suggests the core utility remains highly valued despite the lack of visual updates. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 5/5 | | Total Reviews | 1 | | Sentiment | Thrilled (85/100) | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Improving | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Original Jewish Calendar** (this app) | 5/5 | Thrilled | Frank Yellin | | [올어바웃성경](https://marlvel.ai/apps/com-allabout-bibleapp) | 5.0/5 | N/A | Gilju Lee | | [Hallow: Prayer & Meditation](https://marlvel.ai/apps/hallow-prayer-meditation) | 4.7/5 | n/a | Hallow, Inc. | | [고려대 한국어 속담 사전](https://marlvel.ai/apps/app--428) | N/A/5 | N/A | DaolSoft, Co., Ltd. | | [우리말 의학사전](https://marlvel.ai/apps/app--427) | N/A/5 | N/A | DaolSoft, Co., Ltd. | | [공인중개사 용어사전](https://marlvel.ai/apps/app--429) | N/A/5 | N/A | DaolSoft, Co., Ltd. | ## Company Profile - **Developer:** Frank Yellin ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/original-jewish-calendar/id473564970?uo=4) - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*올어바웃성경*](https://marlvel.ai/apps/com-allabout-bibleapp) (Gilju Lee) · 5.0/5 Rating - [*Hallow: Prayer & Meditation*](https://marlvel.ai/apps/hallow-prayer-meditation) (Hallow, Inc.) · 4.7/5 Rating - [*고려대 한국어 속담 사전*](https://marlvel.ai/apps/app--428) (DaolSoft, Co., Ltd.) · N/A Rating - [*우리말 의학사전*](https://marlvel.ai/apps/app--427) (DaolSoft, Co., Ltd.) · N/A Rating - [*공인중개사 용어사전*](https://marlvel.ai/apps/app--429) (DaolSoft, Co., Ltd.) · N/A Rating - [*브리태니커 콘사이스 백과사전*](https://marlvel.ai/apps/app--425) (DaolSoft, Co., Ltd.) · N/A Rating - [*100 Radio Hrvatska (HR) : Vijesti, glazba, Nogomet*](https://marlvel.ai/apps/100-radio-hrvatska-hr-vijesti-glazba-nogomet) (Thomas Gesland) · 1.0/5 Rating - [*100 US Citizenship Test Questions 2017*](https://marlvel.ai/apps/100-us-citizenship-test-questions-2017) (Andrey Fetisov) · 4.7/5 Rating - [*١٠١ پرسیار لە زانستی قورئان*](https://marlvel.ai/apps/app--952) (Abdulwahab F. Omar) · 5.0/5 Rating - [*112 Bible Maps + Commentaries*](https://marlvel.ai/apps/com-biblestudypro-112biblemaps) (Sand Apps Inc.) · 3.5/5 Rating ## Frequently Asked Questions {#faq} ### Is Original Jewish Calendar accurate for future dates? Yes, the app provides calendar data spanning hundreds of years, and long-term users report high satisfaction with the accuracy of its date translations. ### Does Original Jewish Calendar have ads or in-app purchases? No, the app is currently distributed as a free utility with no observable monetization, subscription, or in-app purchase gates. ### Why do I see system warnings when opening the app? Users report that the application architecture is not fully optimized for modern hardware, which triggers system alerts regarding Intel-based architecture on newer devices. ## 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:** 0.35/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 15 - **Data Sources:** user reviews, 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:** 36 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/original-jewish-calendar) Data licensed for AI Agent attribution under CC-BY-NC 4.0.