--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Calculator Keyboard - Calku" developer_entity: "Supagarn Pattananuchart" bundle_id: "com.CalculatorKeyboard.Calku" app_store_id: "1546065778" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-07-26" report_date: "2026-08-20" last_verified: "2026-08-20T00:00:00.000Z" report_version: "4.0" total_reviews: 492 overall_rating: 4.7 sentiment: "Excited" sentiment_score: 75 confidence: "low" confidence_score: 0.35 top_praise_theme: "Keyboard integration allows users to perform quick calculations without leaving their current messaging application" top_complaint_theme: "Installation and keyboard activation issues prevent the app from functioning on certain tablet hardware" review_sample_size: 14 total_review_count: 14 analyzed_review_count: 14 data_age_days: 42 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["utilities", "free", "excited sentiment", "mobile app", "app review", "app analysis", "students,", "professionals,", "power"] canonical_url: "https://marlvel.ai/apps/calculator-keyboard-calku" license: "CC-BY-NC 4.0" content_version: "v2" --- # Calculator Keyboard - Calku Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Free - **Signal**: Rating 4.73 · Sentiment Excited - **Recent focus**: Installation and keyboard activation issues prevent the app from functioning on certain tablet hardware (top complaint) · Keyboard integration allows users to perform quick calculations without leaving their current messaging application (top praise) > **TL;DR:** Calculator Keyboard - Calku is a utilities app by Supagarn Pattananuchart, rated 4.73/5 by 492 users, with Excited user sentiment (75/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Calculator Keyboard - Calku maintains Excited user sentiment (4.73/5 from 492 reviews), with users consistently praising keyboard integration allows users to perform quick calculations without leaving their current messaging application. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.73/5 (492 reviews) | | **User Mood** | Excited | | **Category** | Utilities | | **Developer** | Supagarn Pattananuchart | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.35/1.0) | | **Data Age** | 42d | ## Metadata & Market Performance - **Publisher:** Supagarn Pattananuchart - **Category:** Utilities - **Target Audience:** Students, professionals, and power users who frequently perform calculations while messaging or browsing on iOS and iPadOS. - **Platforms:** iOS - **Version Reviewed:** 4.0 - **Report Date:** 2026-08-20 - **Signal Count:** 14 reviews analyzed - **Confidence:** Low (0.35/1.0) - **App Store ID (iOS):** 1546065778 - **Bundle ID:** com.CalculatorKeyboard.Calku - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-08-20 ## Executive Snapshot **What it is:** Calculator Keyboard - Calku is a utility that embeds a calculator interface into the iOS system keyboard for use across all apps. **Why users hire it:** It removes the time cost of switching between a calculator and a messaging app, which is the primary friction point for users performing quick math while texting. ## App DNA (Features & Intent) - **[Differentiator] Keyboard-integrated calculator:** Provides a calculator interface directly within the system keyboard for use in third-party apps like Messages or Safari. * *User Intent:* Users seek enhanced value through premium features. - **[Standard] Scientific calculator mode:** Includes advanced mathematical functions beyond basic arithmetic. - **[Standard] Calculation history:** Stores previous inputs and results for quick reference within the keyboard interface. ## Market Position {#market-position} Calculator Keyboard - Calku holds a 4.73 rating across 492 total ratings, positioning it as a niche utility for iOS users. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is currently offered as a free utility with no visible subscription or in-app purchase gates. ## 🟢 User Sentiment (Low Confidence: 14 of 14 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.73/5 - **Platform Split:** iOS 4.7/5 (492 ratings) - **Overall Sentiment:** Excited ### Top Praises - **Keyboard integration allows users to perform quick calculations without leaving their current messaging application** - **Simple and straightforward design makes the utility easy to use for quick daily math tasks** ### Top Complaints (Impact Areas) - **Installation and keyboard activation issues prevent the app from functioning on certain tablet hardware** ## SWOT Analysis {#swot} **Core Strengths:** - System-level keyboard integration removes context-switching **Growth Levers:** - Haptic feedback integration for tactile input ## Recent Changes (v2 → v3) {#recent-changes} The developer has pivoted from a passive maintenance strategy to a more defensive stance, identifying the lack of monetization as a risk to long-term app viability while formalizing a roadmap that prioritizes haptic feedback over UI history logs. **Overall trend**: Stable **Compared at**: 2026-08-20 ### High-impact changes - **[Shifted] Monetization strategy outlook** (positioning) ### Medium-impact changes - **[Added] Privacy-related threat** (swot) - **[Shifted] Development roadmap priority** (features) ## What's New - **Latest (v4.0, 3 weeks ago):** Maintenance update focused on performance improvements and bug fixes. ## App Momentum (Maintenance) {#momentum} - Ships maintenance updates for performance. - Maintains stable user rating. > **Cadence:** 1 total versions · 0 majors in last 6 months · 24 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Calculator Keyboard - Calku is a market-leading utilities app that is completely free. With a 4.73/5 rating from 492 reviews, it delivers strong user satisfaction. > **Bottom Line:** Calculator Keyboard - Calku provides a clear utility by removing app-switching friction, but the current activation failures on tablets limit its reach. Addressing these technical hurdles is the prerequisite for scaling the user base beyond the current niche. **Best for:** Students, professionals, and power users who frequently perform calculations while messaging or browsing on iOS and iPadOS. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Audit keyboard activation logic because installation failures on tablet hardware are a top complaint -> reduce churn ### Outlook: Stable The utility market for keyboard extensions remains stable but dependent on OS-level compatibility. Calculator Keyboard - Calku is currently in a maintenance phase, and the lack of feature expansion leaves it vulnerable to OS updates that could break its core integration. - 🔴 Installation failures on tablet hardware prevent the app from functioning, which limits the potential user base on iPadOS. - 🟢 The core utility of keyboard-integrated calculation remains a high-value proposition for users who frequently multitask in messaging apps. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.73/5 | | Total Reviews | 492 | | Sentiment | Excited (75/100) | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Stable | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Calculator Keyboard - Calku** (this app) | 4.73/5 | Excited | Supagarn Pattananuchart | | [Sota Connect: Secure Network](https://marlvel.ai/apps/fi-catconnect-sota) | 4.9/5 | N/A | Cat Connect | | [avoVPN Desktop](https://marlvel.ai/apps/avovpn-desktop) | N/A/5 | N/A | Avocado VPN Technologies | | [Free VPN by Free VPN .org™](https://marlvel.ai/apps/free-vpn-by-free-vpn-org) | 4.5/5 | Mixed | Free VPN LLC | | [Fusvob VPN : Super VPN 2026](https://marlvel.ai/apps/com-toplinkc-foxexcellent) | 4.4/5 | Mixed | Fuxin Technology | | [Potatso](https://marlvel.ai/apps/potatso) | 4.4/5 | n/a | Potatso Lab LTD | ## Company Profile - **Developer:** Supagarn Pattananuchart ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/calculator-keyboard-calku/id1546065778?uo=4) - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*Sota Connect: Secure Network*](https://marlvel.ai/apps/fi-catconnect-sota) (Cat Connect) · 4.9/5 Rating - [*avoVPN Desktop*](https://marlvel.ai/apps/avovpn-desktop) (Avocado VPN Technologies) · N/A Rating - [*Free VPN by Free VPN .org™*](https://marlvel.ai/apps/free-vpn-by-free-vpn-org) (Free VPN LLC) · 4.5/5 Rating - [*Fusvob VPN : Super VPN 2026*](https://marlvel.ai/apps/com-toplinkc-foxexcellent) (Fuxin Technology) · 4.4/5 Rating - [*Potatso*](https://marlvel.ai/apps/potatso) (Potatso Lab LTD) · 4.4/5 Rating - [*Quantumult X*](https://marlvel.ai/apps/quantumult-x) (Cross Utility Ltd) · 3.8/5 Rating - [*V2Box - V2ray Client*](https://marlvel.ai/apps/v2box-v2ray-client) (techlaim) · 4.6/5 Rating - [*카톡 분석 - 오픈채팅, 카톡 채팅 분석, 통계, 검색*](https://marlvel.ai/apps/com-liger-katalkanalysispaid) (Park Sung Cheol) · N/A Rating - [*로또 황금번호 생성기*](https://marlvel.ai/apps/lotto-lottogold) (jaehwan lee) · N/A Rating - [*도사폰 (만세력 역학도구)*](https://marlvel.ai/apps/app--656) (Softchaser Company Limited) · 5.0/5 Rating ## Frequently Asked Questions {#faq} ### Is Calculator Keyboard - Calku safe to use? The app is a standard utility that functions as a keyboard extension. Users should review the privacy policy provided by the developer to understand how input data is handled during use. ### How does Calculator Keyboard - Calku compare to the built-in iOS calculator? Calculator Keyboard - Calku is designed for use within other apps, whereas the built-in iOS calculator requires switching applications. It is best for users who need to perform calculations while messaging or browsing. ### Is Calculator Keyboard - Calku free? Yes, the app is currently offered as a free utility without subscription or in-app purchase gates. ## 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:** 14 - **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:** 42 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/calculator-keyboard-calku) Data licensed for AI Agent attribution under CC-BY-NC 4.0.