--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Solid Calendar" developer_entity: "Solid Apps S.R.L." bundle_id: "app.Solid-Calendar" app_store_id: "6448245807" category: "Productivity" primary_platform: "ios" primary_monetization: "Paid" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2025-12-03" report_date: "2026-08-06" last_verified: "2026-08-06T00:00:00.000Z" report_version: "2.76" total_reviews: 114 overall_rating: 4.9 confidence: "low" confidence_score: 0.25 data_age_days: 10 momentum_velocity: "steady" intelligence_version: 3 nemesis: "CalenGoo - Calendar and Tasks" competitor_count: 11 tags: ["productivity", "paid", "mobile app", "app review", "app analysis", "professionals,", "students,", "shift-workers"] canonical_url: "https://marlvel.ai/apps/solid-calendar" license: "CC-BY-NC 4.0" content_version: "v2" --- # Solid Calendar Intelligence Report ## TL;DR {#tldr} - **Category**: Productivity · Paid - **Signal**: Rating 4.89 > **TL;DR:** Solid Calendar is a productivity app by Solid Apps S.R.L., rated 4.89/5 by 114 users, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Solid Calendar is a productivity app by Solid Apps S.R.L.. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.89/5 (114 reviews) | | **Category** | Productivity | | **Developer** | Solid Apps S.R.L. | | **Pricing** | Paid | | **Platforms** | iOS | | **Confidence** | Low (0.25/1.0) | | **Data Age** | 10d | ## Metadata & Market Performance - **Publisher:** Solid Apps S.R.L. - **Category:** Productivity - **Target Audience:** Professionals, students, and shift-workers seeking a simple, subscription-free alternative to native calendar applications. - **Platforms:** iOS - **Version Reviewed:** 2.76 - **Report Date:** 2026-08-06 - **Signal Count:** 5 reviews analyzed - **Confidence:** Low (0.25/1.0) - **App Store ID (iOS):** 6448245807 - **Bundle ID:** app.Solid-Calendar - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-08-06 ## Executive Snapshot **What it is:** Solid Calendar is a paid, subscription-free productivity app for iOS and macOS that manages events, tasks, and rotating schedules. **Why users hire it:** Users hire Solid Calendar for a one-time purchase experience that avoids the recurring costs of power-user calendar tools, serving those who prioritize privacy and simplicity over complex enterprise features. ## App DNA (Features & Intent) - **[Standard] Natural Language Input:** Allows conversational event creation to reduce scheduling friction. - **[Standard] Rotating Schedule Manager:** Supports shift-based work patterns for non-office professionals. * *User Intent:* Users seek enhanced value through premium features. - **[Standard] Native Integration:** Syncs with local device calendars to maintain data privacy. * *User Intent:* Users expect seamless access across multiple devices. ## Market Position {#market-position} Solid Calendar maintains a niche position as a paid-upfront utility with a 4.88 rating. The lack of updates over the last 159 days suggests a defensive market stance rather than aggressive growth. ## Monetization Strategy - **Model:** Paid - **Tiers:** $4.99 one-time purchase - **Price:** iOS: $4.99 - **Analysis:** The $4.99 one-time purchase model acts as a primary differentiator against subscription-heavy productivity competitors. ## SWOT Analysis {#swot} **Core Strengths:** - One-time purchase model functions as a switching-cost barrier against subscription-heavy productivity tools **Growth Levers:** - Education partnerships offer an untapped B2B distribution channel for the shift-management feature set ## Recent Changes (v2 → v3) {#recent-changes} The report transitioned from a descriptive product summary to a critical competitive analysis, highlighting the risks of a 159-day update gap and formalizing the $4.99 pricing strategy. **Overall trend**: Mixed **Compared at**: 2026-08-06 ### High-impact changes - **[Shifted] Maintenance-mode assessment** (positioning) - **[Added] Formalized pricing tier** (pricing) ### Medium-impact changes - **[Added] SWOT analysis framework** (swot) - **[Shifted] Target audience expansion** (audience) ## Rivals Landscape {#rivals} > Competitive positioning identified by AI analysis of app features, category, and market signals. ### Solid Calendar vs CalenGoo - Calendar and Tasks - **[CalenGoo - Calendar and Tasks](https://marlvel.ai/apps/com-calengoo-android)** by Gunia UG (haftungsbeschränkt): CalenGoo directly competes with Solid Calendar by offering a robust, feature-rich environment for power users who require deep integration between calendar events and task management. - **Key differences:** - Offers a sophisticated direct sync engine that provides more reliable cross-platform data consistency than Solid. - Includes advanced task-in-event integration, allowing users to manage complex workflows directly within their calendar view. - Provides specialized floating event functionality that offers greater flexibility for scheduling tasks without fixed time slots. ### Contenders (Strong Challengers) - **[Štyri Zmeny](https://marlvel.ai/apps/eu-efreet-styrizmeny)** by Miroslav Mydlo: This app serves the same niche of shift-based workers, focusing on group-oriented scheduling and calendar integration. - Supports working group synchronization, allowing teams to share and coordinate shift schedules seamlessly. - Provides a streamlined focus on shift schedule management that reduces complexity for non-office workers. - **[ShiftCal: Shift Schedule Maker](https://marlvel.ai/apps/shiftcal-shift-schedule-maker)** by nguyen thanh: ShiftCal overlaps with Solid Calendar by providing specialized scheduling tools for users with non-traditional work hours. - Includes automated pay calculation and time tracking features specifically designed for shift-based professional roles. - Offers multi-view scheduling layouts that allow users to visualize complex shift patterns more effectively. - **[Algerie Calendrier 2026](https://marlvel.ai/apps/com-agus-algerie-calendrier)** by Jatisari Inovasi Studio: This app competes by offering localized content and regional holiday integration for specific user demographics. - Provides deep regional holiday integration that offers immediate utility for users in specific geographic markets. - Focuses on high-level event customization and personalization tailored to local cultural and professional requirements. - **[Cat Calendar：Schedule Planner](https://marlvel.ai/apps/com-nicolecat-calendar)** by Nicole Cat: This app targets a similar productivity audience but differentiates through gamification and aesthetic customization. - Features a unique character skin system that gamifies the scheduling experience for more casual users. - Includes a built-in countdown timer, providing a visual urgency tool not present in Solid Calendar. ### Peers (What They Do Better) - **[FP Audit](https://marlvel.ai/apps/ru-fixprice-fpa-android)** by Fix Price: This app occupies the task-management side of the productivity spectrum, focusing on digital checklists and reporting. - Focuses on digital checklists and photo reporting, providing a structured way to manage field-based tasks. - Includes automated task generation, which streamlines the workflow for users managing recurring operational audits. - **[Time Doctor](https://marlvel.ai/apps/time-doctor)** by Mystaff.com LLC: Time Doctor addresses the productivity space through workforce analytics and time tracking rather than event scheduling. - Utilizes AI-driven benchmarks to provide deep workforce analytics and productivity insights for professional teams. - According to reviews, some users allege the app's monitoring features feel invasive and overly restrictive [1]. - **[Flip Clock: Alarm & Pomodoro](https://marlvel.ai/apps/flip-clock-alarm-pomodoro)** by 志杰 朱: This app competes for the user's focus by providing time-tracking and Pomodoro-style productivity tools. - Offers a highly aesthetic, customizable flip-clock interface that serves as a visual productivity desk accessory. - Includes a dedicated Pomodoro sync feature to help users manage deep work sessions through time-blocking. - **[SIGNL4 - Mobile Alerting](https://marlvel.ai/apps/signl4-mobile-alerting)** by Derdack GmbH: While more enterprise-focused, it competes for the same 'time management' real estate by handling on-call scheduling and alerts. - Features automated escalation policies that ensure critical alerts reach the right personnel during on-call shifts. - Integrates with third-party enterprise systems to provide a comprehensive mobile alerting and incident response platform. ### New Kids on the Block (What's Innovative) - **[Wishlist: Smart Wish Tracker](https://marlvel.ai/apps/wishlist-smart-wish-tracker)** by Noman.Sheikh: While focused on tracking, it competes for user attention within the broader personal organization and planning category. - Provides specialized price and quantity tracking for personal items, distinct from traditional event-based calendar management. - **[DayBlocks - Visualize Time](https://marlvel.ai/apps/com-davensix-dayblocks)** by ALAN D NAVARRO LOPEZ: A new entrant that uses time-blocking visualization to compete for the same productivity-focused user base. - Uses color-coded urgency indicators to help users visually prioritize their daily tasks and calendar blocks. ## App Momentum (Steady) {#momentum} - Ships no major updates recently. - Maintains 4.88 rating baseline. > **Cadence:** 5 total versions · 0 majors in last 6 months · 159 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Solid Calendar is a productivity app that is a paid app. It holds a 4.89/5 rating from 114 reviews. > **Bottom Line:** Solid Calendar succeeds as a simple, privacy-first utility, but the lack of recent updates creates a churn risk as users outgrow its basic feature set, so the team must prioritize a feature-parity sprint to defend the paid-upfront value proposition. **Best for:** Professionals, students, and shift-workers seeking a simple, subscription-free alternative to native calendar applications. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship a parity-focused update because the 159-day gap signals maintenance-mode to power users → defend the paid-upfront value proposition ### Feature Gaps vs Competitors - Sophisticated sync engine (available in CalenGoo but missing here) ### Outlook: Mixed The productivity calendar market is consolidating around tools that offer deep task-in-event integration, leaving Solid Calendar exposed to competitors with faster release cadences. If the team does not resume feature development, the current 4.88 rating will likely compress as users shift toward more robust, actively maintained alternatives. - 🔴 The 159-day update gap signals a lack of active development, which invites churn as power users migrate to more frequently updated alternatives. - 🟢 The one-time purchase model continues to attract users fatigued by subscription-heavy productivity tools, maintaining a stable 4.88 rating baseline. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.89/5 | | Total Reviews | 114 | | Confidence | Low | | Pricing Model | Paid | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Mixed | | Outlook | Mixed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Solid Calendar** (this app) | 4.89/5 | N/A | Solid Apps S.R.L. | | [FP Audit](https://marlvel.ai/apps/ru-fixprice-fpa-android) | 4.4/5 | N/A | Fix Price | | [CalenGoo - Calendar and Tasks](https://marlvel.ai/apps/com-calengoo-android) | 4.9/5 | Mixed | Gunia UG (haftungsbeschränkt) | | [Štyri Zmeny](https://marlvel.ai/apps/eu-efreet-styrizmeny) | 4.6/5 | N/A | Miroslav Mydlo | | [DayBlocks - Visualize Time](https://marlvel.ai/apps/com-davensix-dayblocks) | 5.0/5 | N/A | ALAN D NAVARRO LOPEZ | | [ShiftCal: Shift Schedule Maker](https://marlvel.ai/apps/shiftcal-shift-schedule-maker) | 5.0/5 | N/A | nguyen thanh | ## Company Profile - **Developer:** Solid Apps S.R.L. - **Website:** [https://solidapps.co](https://solidapps.co) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/solid-calendar/id6448245807?uo=4) - **Dev Site:** [Official Website](https://solidapps.co) - **Sources:** Developer website content, App store metadata. ## Related Intel Reports - [*FP Audit*](https://marlvel.ai/apps/ru-fixprice-fpa-android) (Fix Price) · 4.4/5 Rating - [*CalenGoo - Calendar and Tasks*](https://marlvel.ai/apps/com-calengoo-android) (Gunia UG (haftungsbeschränkt)) · 4.9/5 Rating - [*Štyri Zmeny*](https://marlvel.ai/apps/eu-efreet-styrizmeny) (Miroslav Mydlo) · 4.6/5 Rating - [*DayBlocks - Visualize Time*](https://marlvel.ai/apps/com-davensix-dayblocks) (ALAN D NAVARRO LOPEZ) · 5.0/5 Rating - [*ShiftCal: Shift Schedule Maker*](https://marlvel.ai/apps/shiftcal-shift-schedule-maker) (nguyen thanh) · 5.0/5 Rating - [*Wishlist: Smart Wish Tracker*](https://marlvel.ai/apps/wishlist-smart-wish-tracker) (Noman.Sheikh) · N/A Rating - [*Time Doctor*](https://marlvel.ai/apps/time-doctor) (Mystaff.com LLC) · 2.8/5 Rating - [*SIGNL4 - Mobile Alerting*](https://marlvel.ai/apps/signl4-mobile-alerting) (Derdack GmbH) · 4.5/5 Rating | Positive Sentiment - [*Flip Clock: Alarm & Pomodoro*](https://marlvel.ai/apps/flip-clock-alarm-pomodoro) (志杰 朱) · 4.8/5 Rating | Positive Sentiment - [*Algerie Calendrier 2026*](https://marlvel.ai/apps/com-agus-algerie-calendrier) (Jatisari Inovasi Studio) · 4.6/5 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:** 0.25/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 5 - **Data Sources:** 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:** 10 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/solid-calendar) Data licensed for AI Agent attribution under CC-BY-NC 4.0.