--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Time Calculator: Hours & Shift" developer_entity: "SHIGETO TAKAGI" bundle_id: "net.oxdb.CalcTime" app_store_id: "562515056" category: "Productivity" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-03-19" report_date: "2026-08-14" last_verified: "2026-08-14T00:00:00.000Z" report_version: "20260315" total_reviews: 559 overall_rating: 3.5 sentiment: "Frustrated" sentiment_score: 35 confidence: "medium" confidence_score: 0.4 top_praise_theme: "Precise time calculation tools allow independent contractors to track multiple work intervals throughout the day" top_complaint_theme: "Aggressive full-screen advertisements block the input fields and make the application completely unusable for users" review_sample_size: 30 total_review_count: 30 analyzed_review_count: 30 data_age_days: 2 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["productivity", "freemium", "frustrated sentiment", "mobile app", "app review", "app analysis", "shift", "workers", "hourly"] canonical_url: "https://marlvel.ai/apps/time-calculator-hours-shift" license: "CC-BY-NC 4.0" content_version: "v2" --- # Time Calculator: Hours & Shift Intelligence Report ## TL;DR {#tldr} - **Category**: Productivity · Freemium - **Signal**: Rating 3.5 · Sentiment Frustrated - **Recent focus**: Aggressive full-screen advertisements block the input fields and make the application completely unusable for users (top complaint) · Precise time calculation tools allow independent contractors to track multiple work intervals throughout the day (top praise) > **TL;DR:** Time Calculator: Hours & Shift is a productivity app by SHIGETO TAKAGI, rated 3.5/5 by 559 users, with Frustrated user sentiment (35/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Time Calculator: Hours & Shift faces Frustrated user sentiment (3.5/5 from 559 reviews), with users reporting aggressive full-screen advertisements block the input fields and make the application completely unusable for users as the primary concern. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 3.5/5 (559 reviews) | | **User Mood** | Frustrated | | **Category** | Productivity | | **Developer** | SHIGETO TAKAGI | | **Pricing** | Freemium | | **Platforms** | iOS & Android | | **Confidence** | Medium (0.4/1.0) | | **Data Age** | 2d | ## Metadata & Market Performance - **Publisher:** SHIGETO TAKAGI - **Category:** Productivity - **Target Audience:** Shift workers and hourly employees requiring a tool to track and sum work hours. - **Platforms:** iOS & Android - **Version Reviewed:** 20260316 - **Report Date:** 2026-08-14 - **Signal Count:** 30 reviews analyzed - **Confidence:** Medium (0.4/1.0) - **App Store ID (iOS):** 562515056 - **Bundle ID:** net.oxdb.CalcTime - **Google Play ID:** net.oxdb.CalcTime - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-08-14 ## Executive Snapshot **What it is:** Time Calculator: Hours & Shift is a productivity utility for hourly workers to sum time entries on iOS and Android. **Why users hire it:** The app removes the cognitive friction of manual time-math for contractors, but the current ad-heavy experience forces users to seek alternatives. ## App DNA (Features & Intent) - **[Standard] Multi-Entry Time Calculation:** Calculates elapsed time for up to 10 simultaneous cases. - **[Standard] Time Calculation History:** Logs previous time entries and results for reference. ## Market Position {#market-position} Time Calculator: Hours & Shift maintains a 4.6-star rating on iOS despite a 147-day update gap. The lack of a paid tier creates a monetization ceiling that leaves the app vulnerable to ad-free competitors. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free with ad support - **Analysis:** Monetization relies on ad-supported free access, but the absence of a paid ad-removal tier limits revenue potential. ## 🔴 User Sentiment (Medium Confidence: 30 of 30 reviews analyzed) {#user-sentiment} - **Overall Rating:** 3.5/5 - **Platform Split:** iOS 4.6/5 (112 ratings) | Android 3.2/5 (447 ratings) - **Overall Sentiment:** Frustrated ### Top Praises - **Precise time calculation tools allow independent contractors to track multiple work intervals throughout the day** - **Simple and straightforward interface design makes time math accessible for users who struggle with calculations** ### Top Complaints (Impact Areas) - **Aggressive full-screen advertisements block the input fields and make the application completely unusable for users** ## SWOT Analysis {#swot} **Core Strengths:** - Core calculation engine provides precise minute and hour summation - Minimalist interface design lowers cognitive barrier for daily tasks **Growth Levers:** - Implement in-app purchase for ad-free access - Add settings toggle for screen timeout ## Recent Changes (v2 → v3) {#recent-changes} The product remains in a maintenance-only state with no changes to features or pricing. The competitive outlook has sharpened to reflect the specific risk of user migration to ad-free alternatives. **Overall trend**: Stable **Compared at**: 2026-08-14 ### Medium-impact changes - **[Shifted] Competitive Outlook Refinement** (positioning) - **[Shifted] Threat Profile Update** (swot) ## What's New - **Latest (v20260316, 4 months ago):** General user interface improvements. ## App Momentum (Maintenance) {#momentum} - Ships minor UI updates only. - Maintenance-mode cadence, 147 days since update. > **Cadence:** 2 total versions · 0 majors in last 6 months · 147 days since last update · 3 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} Time Calculator: Hours & Shift is a productivity app that is free with in-app purchases. With a 3.5/5 rating from 559 reviews, it faces significant user friction. > **Bottom Line:** Implementing a paid ad-removal tier would address the primary friction point driving negative sentiment, allowing the developer to monetize the user base while restoring the core utility of the calculation engine. **Best for:** Shift workers and hourly employees requiring a tool to track and sum work hours. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship a paid ad-removal in-app purchase because user reviews explicitly demand an ad-free experience → increase revenue ### Outlook: Declining The category for simple time-tracking utilities is consolidating around apps that offer clean, ad-free experiences via subscription or one-time purchase. Time Calculator: Hours & Shift remains exposed to churn as long as the current ad-heavy model persists without a paid alternative, signaling a decline in user trust. - 🔴 Aggressive ad overlays in the latest version block input fields, which erodes the core utility and drives users to seek alternatives. - 🔴 The 147-day update gap suggests a maintenance-only posture, leaving critical usability complaints like battery drain unaddressed for the foreseeable future. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 3.5/5 | | Total Reviews | 559 | | Sentiment | Frustrated (35/100) | | Confidence | Medium | | Pricing Model | Freemium | | Platforms | iOS & Android | | Key Features | 2 analyzed | | Trend | Stable | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Time Calculator: Hours & Shift** (this app) | 3.5/5 | Frustrated | SHIGETO TAKAGI | | [Mitsu: AI Life Coach](https://marlvel.ai/apps/mitsu-ai-life-coach) | N/A/5 | N/A | C2 Insights | | [ChatGPT](https://marlvel.ai/apps/chatgpt) | 4.8/5 | n/a | OpenAI OpCo, LLC | | [HitWave](https://marlvel.ai/apps/ciendor-applications-hitwave) | 2.6/5 | Mixed | Ciendor Holdings Corp. LTD | | [Pattrn - Discipline Tracker](https://marlvel.ai/apps/pattrn-discipline-tracker) | 4.8/5 | Thrilled | Pedro Schott | | [SpaceDesk App](https://marlvel.ai/apps/spacedesk-app) | N/A/5 | N/A | Hawsabah | ## Company Profile - **Developer:** SHIGETO TAKAGI - **Website:** [https://oxdb.net/iphone/request/](https://oxdb.net/iphone/request/) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/time-calculator-hours-shift/id562515056?uo=4) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=net.oxdb.CalcTime&hl=en&gl=us) - **Dev Site:** [Official Website](https://oxdb.net/iphone/request/) - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*Mitsu: AI Life Coach*](https://marlvel.ai/apps/mitsu-ai-life-coach) (C2 Insights) · N/A Rating - [*ChatGPT*](https://marlvel.ai/apps/chatgpt) (OpenAI OpCo, LLC) · 4.8/5 Rating - [*HitWave*](https://marlvel.ai/apps/ciendor-applications-hitwave) (Ciendor Holdings Corp. LTD) · 2.6/5 Rating - [*Pattrn - Discipline Tracker*](https://marlvel.ai/apps/pattrn-discipline-tracker) (Pedro Schott) · 4.8/5 Rating | Excellent Sentiment - [*SpaceDesk App*](https://marlvel.ai/apps/spacedesk-app) (Hawsabah) · N/A Rating - [*한음달-한국인에게 꼭 맞는 음력달력, 캘린더*](https://marlvel.ai/apps/app--103) (YunaSoft Inc.) · 4.6/5 Rating - [*바로메모 - 매일 바로 작성하는 메모장*](https://marlvel.ai/apps/cswpd-memo) (SuWon Choi) · N/A Rating - [*근로장려금 알리미 - 신청, 기준, 금액계산 가이드*](https://marlvel.ai/apps/com-swing2app-v3-d83e9bb95c05347f59ad81dea3b925ebf) (SY Company) · 3.8/5 Rating - [*통화관리솔루션 (부평구청용)*](https://marlvel.ai/apps/byto-bupyeong) (BYTO) · N/A Rating - [*시외버스터미널 예매가이드 - 시간표*](https://marlvel.ai/apps/com-rewd-metopcrent) (Multisoft app) · 4.1/5 Rating ## Frequently Asked Questions {#faq} ### Is Time Calculator: Hours & Shift free to use? Yes, the app is free, but it is supported by advertisements. Currently, there is no paid option to remove these ads, which some users find intrusive. ### Does Time Calculator: Hours & Shift have intrusive ads? According to user reviews, the app displays full-screen advertisements that can block input fields and make the app difficult to use. ### Can I pay to remove ads in Time Calculator: Hours & Shift? No, there is currently no in-app purchase or paid tier available to remove advertisements, despite frequent user requests for this feature. ## 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:** 0.4/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 30 - **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:** 2 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/time-calculator-hours-shift) Data licensed for AI Agent attribution under CC-BY-NC 4.0.