--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "CalcNote: Calc Log & Folders" developer_entity: "SiU Ahn" bundle_id: "com.siwooeo.calcnote" app_store_id: "6780283322" category: "Productivity" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-07-24" report_date: "2026-10-24" last_verified: "2026-10-24T00:00:00.000Z" report_version: "1.1.0" total_reviews: 0 confidence: "low" confidence_score: 0.2 data_age_days: 21 momentum_velocity: "maintenance" intelligence_version: 2 tags: ["productivity", "freemium", "mobile app", "app review", "app analysis", "freelancers,", "students,", "budget-conscious"] canonical_url: "https://marlvel.ai/apps/calcnote-calc-log-folders" license: "CC-BY-NC 4.0" content_version: "v2" --- # CalcNote: Calc Log & Folders Intelligence Report ## TL;DR {#tldr} - **Category**: Productivity · Freemium > **TL;DR:** CalcNote: Calc Log & Folders is a productivity app by SiU Ahn, available on iOS & Android. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** CalcNote: Calc Log & Folders is a productivity app by SiU Ahn. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Productivity | | **Developer** | SiU Ahn | | **Pricing** | Freemium | | **Platforms** | iOS & Android | | **Confidence** | Low (0.2/1.0) | | **Data Age** | 21d | ## Metadata & Market Performance - **Publisher:** SiU Ahn - **Category:** Productivity - **Target Audience:** Freelancers, students, and budget-conscious individuals who need to track and organize complex calculation steps. - **Platforms:** iOS & Android - **Version Reviewed:** 1.1.0 - **Report Date:** 2026-10-24 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.2/1.0) - **App Store ID (iOS):** 6780283322 - **Bundle ID:** com.siwooeo.calcnote - **Google Play ID:** com.siwooeo.calcnote - **Data Window:** Analysis based on signals collected up to 2026-10-24 ## Executive Snapshot **What it is:** CalcNote is a calculation-history notebook for iOS and Android that saves full mathematical expressions and organizes them into folders. **Why users hire it:** It removes the cognitive friction of forgetting how a specific number was reached, which is a common pain point for users managing budgets or freelance quotes. ## App DNA (Features & Intent) - **[Differentiator] Expression Logging:** Saves the full mathematical expression alongside the result as a card, allowing users to review calculation steps later. - **[Standard] Folder Organization:** Allows categorization of calculations into color-coded folders for specific use cases like budgets or quotes. - **[Standard] Precision Rounding:** Enables manual configuration of rounding precision for financial accuracy in bookkeeping and quotes. ## Market Position {#market-position} CalcNote operates in the Productivity category, focusing on calculation history rather than raw computation speed. With no significant rating volume yet, its position remains early-stage and dependent on organic discovery. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free with ads, One-time purchase for ad removal - **Analysis:** The freemium model uses a single IAP to gate ad-free usage, targeting users who require a persistent calculation log. ## SWOT Analysis {#swot} **Core Strengths:** - Persistent expression logging creates a high-utility audit trail for financial tasks - Color-coded folder organization reduces cognitive load for multi-project bookkeeping **Growth Levers:** - Introducing a cloud-sync tier could create a recurring revenue stream while addressing the primary data-retention risk ## What's New - **Latest (v1.1.0, 3 months ago):** Introduced free-form caret editing for mid-expression insertion and a redesigned horizontal calculation history log. ## App Momentum (Maintenance) {#momentum} - Ships ~3-month maintenance cadence. - Last major release July 2026. > **Cadence:** 1 total versions · 1 majors in last 6 months · 93 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} CalcNote: Calc Log & Folders is a productivity app that is free with in-app purchases. > **Bottom Line:** CalcNote provides a clear utility for users needing to track financial reasoning, but the current maintenance-only cadence leaves it vulnerable to platform-level feature encroachment. Prioritizing a cloud-sync mechanism would shift the app from a static tool to a persistent data service. **Best for:** Freelancers, students, and budget-conscious individuals who need to track and organize complex calculation steps. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship cloud-sync functionality because it is the primary barrier to long-term data retention → increase user switching costs ### Outlook: Stable Users report: The productivity market for specialized calculators is consolidating around tools that offer seamless data persistence. CalcNote is currently exposed due to its local-only storage model, which limits its utility as a long-term financial tool for freelancers and students. - ⚪ The ~3-month maintenance cadence indicates the developer is prioritizing stability over rapid feature expansion, which limits competitive growth potential. - 🔴 The absence of cloud-sync functionality creates a data-loss risk that could drive churn when users upgrade their devices. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Freemium | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **CalcNote: Calc Log & Folders** (this app) | N/A/5 | N/A | SiU Ahn | | [HitWave](https://marlvel.ai/apps/ciendor-applications-hitwave) | 2.5/5 | Mixed | Ciendor Holdings Corp. LTD | | [ChatGPT](https://marlvel.ai/apps/chatgpt) | 4.8/5 | n/a | OpenAI OpCo, LLC | | [VPN 360: Fast & Secure Proxy](https://marlvel.ai/apps/co-infinitysoft-vpn360) | 4.5/5 | Mixed | Pango GmbH | | [VPN - Super Unlimited Proxy](https://marlvel.ai/apps/vpn-super-unlimited-proxy) | 4.7/5 | Thrilled | Mobile Jump Pte Ltd | | [Bookmarks - Send To Self](https://marlvel.ai/apps/bookmarks-send-to-self) | 4.4/5 | Excited | GILI | ## Company Profile - **Developer:** SiU Ahn - **Website:** [https://www.reactiveworks.dev](https://www.reactiveworks.dev) ## Data Sources & Links - **App Store ID:** 6780283322 - **Google Play ID:** com.siwooeo.calcnote - **Dev Site:** [Official Website](https://www.reactiveworks.dev) - **Sources:** Developer website content, App store metadata. ## Related Intel Reports - [*HitWave*](https://marlvel.ai/apps/ciendor-applications-hitwave) (Ciendor Holdings Corp. 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CalcNote offers precision rounding and expression logging, which are useful for basic bookkeeping and quotes, but it lacks the advanced reporting or tax-compliance features of dedicated accounting software. ### Does CalcNote sync my calculations across devices? No, CalcNote stores your calculation records locally on your device by default. You can export and import your history manually, but there is no automatic cloud synchronization. ### What is the difference between CalcNote and a standard calculator? Standard calculators discard your input after the result is shown. CalcNote saves the entire expression and result as a card, allowing you to review your reasoning later. ## 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:** 0.2/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **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:** 21 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/calcnote-calc-log-folders) Data licensed for AI Agent attribution under CC-BY-NC 4.0.