--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Jewish Calendar - CalJ" developer_entity: "Gabriel Zerbib" bundle_id: "fr.plenitech.icalj" app_store_id: "345650585" category: "Lifestyle" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-08-08" report_date: "2026-08-08" last_verified: "2026-08-08T00:00:00.000Z" report_version: "6.3.2" total_reviews: 146 overall_rating: 4.7 sentiment: "Thrilled" sentiment_score: 85 confidence: "medium" confidence_score: 0.6 top_praise_theme: "Comprehensive collection of daily religious tools and zmanim schedules provides a complete utility for observant users" top_complaint_theme: "Recent changes to location search functionality make finding specific cities or regions less efficient for users" review_sample_size: 49 total_review_count: 49 analyzed_review_count: 49 data_age_days: 8 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["lifestyle", "free", "thrilled sentiment", "mobile app", "app review", "app analysis", "individuals", "seeking", "digital"] canonical_url: "https://marlvel.ai/apps/jewish-calendar-calj" license: "CC-BY-NC 4.0" content_version: "v2" --- # Jewish Calendar - CalJ Intelligence Report ## TL;DR {#tldr} - **Category**: Lifestyle · Free - **Signal**: Rating 4.7 · Sentiment Thrilled - **Recent focus**: Recent changes to location search functionality make finding specific cities or regions less efficient for users (top complaint) · Comprehensive collection of daily religious tools and zmanim schedules provides a complete utility for observant users (top praise) > **TL;DR:** Jewish Calendar - CalJ is a lifestyle app by Gabriel Zerbib, rated 4.7/5 by 146 users, with Thrilled user sentiment (85/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Jewish Calendar - CalJ maintains Thrilled user sentiment (4.7/5 from 146 reviews), with users consistently praising comprehensive collection of daily religious tools and zmanim schedules provides a complete utility for observant users. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.7/5 (146 reviews) | | **User Mood** | Thrilled | | **Category** | Lifestyle | | **Developer** | Gabriel Zerbib | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Medium (0.6/1.0) | | **Data Age** | 8d | ## Metadata & Market Performance - **Publisher:** Gabriel Zerbib - **Category:** Lifestyle - **Target Audience:** Individuals seeking a digital tool for Jewish calendar management, daily prayer texts, and religious timing calculations. - **Platforms:** iOS - **Version Reviewed:** 6.3.2 - **Report Date:** 2026-08-08 - **Signal Count:** 49 reviews analyzed - **Confidence:** Medium (0.6/1.0) - **App Store ID (iOS):** 345650585 - **Bundle ID:** fr.plenitech.icalj - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-08-08 ## Executive Snapshot **What it is:** Jewish Calendar - CalJ is a lifestyle utility providing religious date conversion, prayer texts, and zmanim schedules for observant users on iOS. **Why users hire it:** Users hire the app to manage daily religious obligations through a bloat-free interface, so the core value is reliability and speed of access. ## App DNA (Features & Intent) - **[Standard] Zmanim and Shabbat Times:** Provides daily religious timing calculations based on location, reinforcing the open-app habit. * *User Intent:* Users are motivated by consistent progression and daily incentives. - **[Differentiator] Jerusalem Compass:** Directional tool for prayer orientation toward Jerusalem, acting as a unique utility differentiator. - **[Differentiator] WordPress Plugin:** Enables congregations to display Shabbat times on their own websites, anchoring the brand within synagogue websites. ## Market Position {#market-position} CalJ maintains a 4.7-star rating across 146 reviews, positioning it as a stable, long-term utility for the observant community. The lack of recent major feature updates suggests a maintenance-focused strategy that prioritizes stability over aggressive growth. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is distributed as a free utility without visible subscription or IAP gates. ## 🟢 User Sentiment (Medium Confidence: 49 of 49 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.7/5 - **Platform Split:** iOS 4.7/5 (146 ratings) - **Overall Sentiment:** Thrilled ### Top Praises - **Comprehensive collection of daily religious tools and zmanim schedules provides a complete utility for observant users** - **Responsive developer engagement ensures that user suggestions are frequently integrated into the core application experience** - **Clean and bloat-free interface design allows users to access essential religious information without unnecessary distractions** ### Top Complaints (Impact Areas) - **Recent changes to location search functionality make finding specific cities or regions less efficient for users** ## SWOT Analysis {#swot} **Core Strengths:** - Responsive developer engagement ensures user suggestions are integrated into the core experience **Growth Levers:** - Adding English translations and custom prayer variations would expand the user base to those who do not read Hebrew ## Recent Changes (v2 → v3) {#recent-changes} The app's competitive position is increasingly viewed as stagnant, with a shift toward addressing UX friction and localization to prevent user churn. **Overall trend**: Mixed **Compared at**: 2026-08-08 ### High-impact changes - **[Shifted] Competitive Stance** (positioning) - **[Declined] Outlook Trend** (sentiment) ### Medium-impact changes - **[Shifted] SWOT Consolidation** (swot) ### Low-impact changes - **[Shifted] Review Count Metric** (positioning) ## What's New - **Latest (v6.3.2, today):** General bug fixes. ## App Momentum (Maintenance) {#momentum} - Ships bug fixes only. - Last major release date unknown. > **Cadence:** 2 total versions · 0 majors in last 6 months · 0 days since last update · 18 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} Jewish Calendar - CalJ is a market-leading lifestyle app that is completely free. With a 4.7/5 rating from 146 reviews, it delivers strong user satisfaction. > **Bottom Line:** Jewish Calendar - CalJ maintains a loyal base through its bloat-free utility, but the recent location-search regression threatens the daily-use habit, so the PM should prioritize restoring text-based search to stabilize retention. **Best for:** Individuals seeking a digital tool for Jewish calendar management, daily prayer texts, and religious timing calculations. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] Pivot location search to restore text-based input alongside the map view because users report the current map-only workflow slows down daily use → restore efficiency. ### Outlook: Mixed The market for religious lifestyle utilities is consolidating around apps that offer both deep utility and modern accessibility. CalJ is currently exposed due to its maintenance-mode cadence and recent UX regressions, so the PM must prioritize stability to prevent the loss of its core user base to more updated competitors. - 🔴 Recent location search regressions slow down the user workflow, which increases churn risk among daily users who rely on fast access to zmanim. - 🟢 High developer responsiveness to user feedback maintains a strong 4.7-star rating, providing a stable foundation for future feature expansion. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.7/5 | | Total Reviews | 146 | | Sentiment | Thrilled (85/100) | | Confidence | Medium | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Mixed | | Outlook | Mixed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Jewish Calendar - CalJ** (this app) | 4.7/5 | Thrilled | Gabriel Zerbib | | [Alarmy - Loud alarm clock](https://marlvel.ai/apps/alarmy-loud-alarm-clock) | 4.8/5 | Excited | Delight Room Co., Ltd. | | [Tinder Dating App: Date & Chat](https://marlvel.ai/apps/tinder-dating-app-date-chat) | 4.0/5 | n/a | Tinder LLC | | [Alarmie: Easy Rise Alarm Clock](https://marlvel.ai/apps/alarmie-easy-rise-alarm-clock) | 4.4/5 | Mixed | Jintian Wang | | [AlarmMon ( alarm clock )](https://marlvel.ai/apps/alarmmon-alarm-clock) | 4.3/5 | n/a | Malang Studio Co. Ltd, | | [Journey - Diary, Journal](https://marlvel.ai/apps/com-journey-ios-app) | 4.6/5 | Excited | Two App Studio Pte. Ltd. | ## Company Profile - **Developer:** Gabriel Zerbib - **Website:** [https://blog.calj.net/en/](https://blog.calj.net/en/) - **Social:** [Facebook](https://www.facebook.com/sharer.php?u=https) · [X/Twitter](https://twitter.com/intent) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/jewish-calendar-calj/id345650585?uo=4) - **Dev Site:** [Official Website](https://blog.calj.net/en/) - **Sources:** Developer website content, App store metadata, User reviews. ## Related Intel Reports - [*Alarmy - Loud alarm clock*](https://marlvel.ai/apps/alarmy-loud-alarm-clock) (Delight Room Co., Ltd.) · 4.8/5 Rating | Positive Sentiment - [*Tinder Dating App: Date & Chat*](https://marlvel.ai/apps/tinder-dating-app-date-chat) (Tinder LLC) · 4.0/5 Rating - [*Alarmie: Easy Rise Alarm Clock*](https://marlvel.ai/apps/alarmie-easy-rise-alarm-clock) (Jintian Wang) · 4.4/5 Rating - [*AlarmMon ( alarm clock )*](https://marlvel.ai/apps/alarmmon-alarm-clock) (Malang Studio Co. Ltd,) · 4.3/5 Rating - [*Journey - Diary, Journal*](https://marlvel.ai/apps/com-journey-ios-app) (Two App Studio Pte. Ltd.) · 4.6/5 Rating | Positive Sentiment - [*Swiftime*](https://marlvel.ai/apps/swiftime) (MEDIANO Co.,Ltd.) · 4.5/5 Rating | Positive Sentiment - [*마주*](https://marlvel.ai/apps/an-offline-network-where-you-meet-through-qr-codes) (lvher) · N/A Rating - [*모앗*](https://marlvel.ai/apps/moat-moatapp) (JUNSEOK LEE) · N/A Rating - [*야기*](https://marlvel.ai/apps/tistory-88yhtserof-yagi) (Yunhwi Lim) · N/A Rating - [*책력*](https://marlvel.ai/apps/ryubi-chaengnyeok) (jeongrim oh) · N/A Rating ## 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:** 0.6/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 49 - **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:** 8 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/jewish-calendar-calj) Data licensed for AI Agent attribution under CC-BY-NC 4.0.