--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "StairPlan: Stair Calculator" developer_entity: "ZHENGQIAO JIANG" bundle_id: "com.jzq.stairstringer" app_store_id: "6767059580" category: "Utilities" primary_platform: "ios" primary_monetization: "Subscription" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-09-14" report_date: "2026-09-26" last_verified: "2026-09-26T00:00:00.000Z" report_version: "1.6.0" total_reviews: 0 confidence: "low" confidence_score: 0.2 data_age_days: 4 momentum_velocity: "steady" intelligence_version: 2 tags: ["utilities", "subscription", "mobile app", "app review", "app analysis", "professional", "carpenters,", "builders,"] canonical_url: "https://marlvel.ai/apps/stairplan-stair-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- # StairPlan: Stair Calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Subscription > **TL;DR:** StairPlan: Stair Calculator is a utilities app by ZHENGQIAO JIANG, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** StairPlan: Stair Calculator is a utilities app by ZHENGQIAO JIANG. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Utilities | | **Developer** | ZHENGQIAO JIANG | | **Pricing** | Subscription | | **Platforms** | iOS | | **Confidence** | Low (0.2/1.0) | | **Data Age** | 4d | ## Metadata & Market Performance - **Publisher:** ZHENGQIAO JIANG - **Category:** Utilities - **Target Audience:** Professional carpenters, deck builders, and renovation contractors requiring code-compliant stair calculations and CAD-ready exports. - **Platforms:** iOS - **Version Reviewed:** 1.6.0 - **Report Date:** 2026-09-26 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.2/1.0) - **App Store ID (iOS):** 6767059580 - **Bundle ID:** com.jzq.stairstringer - **Data Window:** Analysis based on signals collected up to 2026-09-26 ## Executive Snapshot **What it is:** StairPlan is a stair geometry and code-compliance calculator for contractors and DIY builders on iOS. **Why users hire it:** It replaces manual framing square calculations and complex code-book lookups with a digital, offline-capable workflow that reduces liability for builders. ## App DNA (Features & Intent) - **[Differentiator] AR Camera Measurement:** Uses LiDAR for 1 cm accuracy in rise measurement. - **[Differentiator] Code Compliance Engine:** Real-time validation against US IRC, IBC, OSHA, ADA, and international codes. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. - **[Differentiator] Multi-format Export:** Generates PDF, DXF, SVG, and CSV cut lists for CAD and spreadsheets. ## Market Position {#market-position} StairPlan occupies the professional utility segment of the construction tools category. The app maintains a steady release cadence with two updates in the last month, focusing on multi-floor and rough-opening precision to defend its position against general-purpose calculators. ## Monetization Strategy - **Model:** Subscription - **Tiers:** 3-day free trial, $1.99/week, $4.99/month, $29.99/year, $79.99 lifetime - **Analysis:** Subscription-first model with a high-value lifetime option, designed to capture both transient DIY users and professional contractors. ## SWOT Analysis {#swot} **Core Strengths:** - Code compliance engine reduces professional liability - Multi-format CAD exports integrate into professional workflows - Offline-first architecture ensures utility on remote sites **Growth Levers:** - Automated stringer-layout overlays via AR - Localized marketing for international code modules ## What's New - **Latest (v1.6.0, 1 weeks ago):** Introduced multi-floor stair support with independent Rough Opening calculations and improved precision for tread nosing and wraparound deck layouts. ## App Momentum (Steady) {#momentum} - Shipped multi-floor stair calculation support. - Improved rough opening precision. - Ships ~2 releases per month. > **Cadence:** 2 total versions · 1 majors in last 6 months · 12 days since last update · 19 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} StairPlan: Stair Calculator is an utilities app. > **Bottom Line:** StairPlan secures its position by embedding professional liability protection into the calculation workflow, which justifies the premium subscription cost for contractors. Maintaining this authority requires a rigorous update cadence to match evolving regional building codes, ensuring the tool remains the primary source of truth for site-level decisions. **Best for:** Professional carpenters, deck builders, and renovation contractors requiring code-compliant stair calculations and CAD-ready exports. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Invest in AR stringer-layout overlays because it is the top-requested workflow enhancement → increase professional retention ### Outlook: Stable The construction-utility market is consolidating around tools that offer direct CAD integration and code-compliance validation. StairPlan is well-positioned to capture the professional segment, provided the update cadence keeps pace with regional building code changes. - 🟢 The latest release introduces multi-floor stair support, signaling active feature investment rather than maintenance-mode stagnation. - ⚪ The consistent two-release-per-month cadence ensures the code-compliance engine remains accurate, which is essential for retaining professional trust. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Subscription | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **StairPlan: Stair Calculator** (this app) | N/A/5 | N/A | ZHENGQIAO JIANG | | [Sota Connect: Secure Network](https://marlvel.ai/apps/fi-catconnect-sota) | 4.8/5 | N/A | Cat Connect | | [V2Box - V2ray Client](https://marlvel.ai/apps/v2box-v2ray-client) | 4.6/5 | n/a | techlaim | | [App For Siri Commands Tips](https://marlvel.ai/apps/app-for-siri-commands-tips) | N/A/5 | N/A | Anh La Phan Son | | [avoVPN Desktop](https://marlvel.ai/apps/avovpn-desktop) | N/A/5 | N/A | Avocado VPN Technologies | | [Bin Days - Bin Reminder](https://marlvel.ai/apps/bin-days-bin-reminder) | N/A/5 | N/A | Vicki Partridge | ## Company Profile - **Developer:** ZHENGQIAO JIANG - **Website:** [https://taxlite.net/stair_stringer_calc/support.html](https://taxlite.net/stair_stringer_calc/support.html) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/stairplan-stair-calculator/id6767059580?uo=4) - **Dev Site:** [Official Website](https://taxlite.net/stair_stringer_calc/support.html) - **Sources:** Developer website content, App store metadata. ## Related Intel Reports - [*Sota Connect: Secure Network*](https://marlvel.ai/apps/fi-catconnect-sota) (Cat Connect) · 4.8/5 Rating - [*V2Box - V2ray Client*](https://marlvel.ai/apps/v2box-v2ray-client) (techlaim) · 4.6/5 Rating - [*App For Siri Commands Tips*](https://marlvel.ai/apps/app-for-siri-commands-tips) (Anh La Phan Son) · N/A Rating - [*avoVPN Desktop*](https://marlvel.ai/apps/avovpn-desktop) (Avocado VPN Technologies) · N/A Rating - [*Bin Days - Bin Reminder*](https://marlvel.ai/apps/bin-days-bin-reminder) (Vicki Partridge) · N/A Rating - [*Fusvob VPN : Super VPN 2026*](https://marlvel.ai/apps/com-toplinkc-foxexcellent) (Fuxin Technology) · 4.5/5 Rating - [*Gear Ratio Calculator & RPM*](https://marlvel.ai/apps/cog-gear-ratio-calculator) (Linh Phan Nhat Khanh) · N/A Rating - [*NordVPN: VPN Fast & Secure*](https://marlvel.ai/apps/com-nordvpn-nordvpn) (Nordvpn S.A.) · 4.7/5 Rating - [*Pick and Pull: Junkyard Finder*](https://marlvel.ai/apps/pick-and-pull-junkyard-finder) (Vladimir Kostadinov Stoyanov) · 3.7/5 Rating - [*Pulley Calculator Easy*](https://marlvel.ai/apps/pulley-calculator-easy) (YAVUZ BULAMADIK) · N/A Rating ## Frequently Asked Questions {#faq} ### Is StairPlan suitable for professional contractors? Yes, StairPlan is designed for professional carpenters and estimators, featuring real-time validation against US IRC, IBC, OSHA, and international building codes to help reduce liability. ### Does StairPlan require an internet connection? No, StairPlan functions entirely offline, allowing contractors to perform calculations and save projects on remote job sites without connectivity. ### What file formats can StairPlan export? StairPlan supports PDF cut diagrams, DXF and SVG files for CAD software, and CSV cut lists for spreadsheet documentation. ### How does StairPlan compare to free stair calculators? Unlike many free calculators, StairPlan provides professional-grade code compliance validation, AR-based measurement, and CAD-ready exports, making it a specialized tool for professional workflows rather than casual DIY use. ## 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:** 4 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/stairplan-stair-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.