# Plumbline Studio — Precision jobsite tools > Precision jobsite tools (iPhone/iPad app by Robert Corbin.) - Source: https://appshunter.io/ios/app/plumbline-studio/id6771016320 (this page in markdown: same URL + `.md`) - Developer: [Robert Corbin](https://appshunter.io/developer/1890247992) - Category: Utilities - Price: $2.99 - Age rating: 4+ - Requires: iOS 17.0 · 3 MB - Languages: American English - Released: 2026-05-20 - Data updated: 2026-08-26 - User reviews in markdown: https://appshunter.io/ios/app/plumbline-studio/id6771016320/reviews.md ## What is Plumbline Studio? Plumbline Studio turns your iPhone into a focused measurement bench for carpenters, remodelers, inspectors, installers, and careful homeowners. Use it when you need a level, plumb check, protractor, slope calculator, flatness scan, or trade math without opening a pile of separate utilities. Core tools: - Live bubble level with tap-to-zero calibration - Dual-axis bullseye readout for cabinets, benches, shelves, and trim - AR-style plumb planning view for checking vertical alignment - Protractor and inclinometer with hold-to-lock angle capture - Slope calculator with rise, run, degrees, percent grade, and ratio - Stair, rafter, crown, board-foot, and cut-list helpers - Flatness scan for spotting dips and bumps across a surface - Project journal for saved measurements, notes, client names, and locations Plumbline Studio is built around practical job flow. Take a reading, lock it, copy it, save it to a project, and keep moving. The interface is designed for repeated work in a shop, basement, garage, or jobsite, not for a one-time novelty measurement. The app stores projects locally on your device. Camera and photo access are used only when you choose to attach a reference image to a measurement. ## Version history (last 5 releases) ### 2.2 — 2026-08-21 Expands the field measurement bench with level, plumb, protractor, slope, flatness, and trade-math tools, plus clearer saved-project workflows for repeated shop and jobsite use. ### 2.1 — 2026-08-06 CutPlanner: Site datums, tolerance chains, cut optimization, and job evidence. - Establish the site datum, reference face, units, and calibration state - Capture chained measurements with direction and tolerance - Nest cuts against actual stock and preserve offcut candidates - Sequence checks, fasteners, shims, and installation holds - Issue a cut list and signed measurement report with open exceptions ### 2.0.1 — 2026-06-25 This update sharpens the interface: the iPad layout now uses a centered, comfortable reading width instead of stretching edge to edge, plus small display fixes. iPhone is unchanged. ### 2.0 — 2026-06-21 Plumbline Studio 2.0 — a big pro upgrade to the Pro Calc suite, still 100% offline. 11 new calculators, each with PDF/material-list export where it counts: • Fraction Calculator & converter: exact feet-inch-sixteenths add, subtract, multiply, divide. • IRC Span Tables: joist & rafter max clear spans by size, species/grade, and spacing, with a smallest-size recommender. • Baluster Spacing under the 4" sphere rule, with a mark-out list. • Tile & Flooring layout with waste and sliver detection. • Coverage estimator for paint and materials. • On-Center Layout (stud/joist marks), Roof Pitch (common + hip/valley), Footing Planner, Drywall, Deck Boards, and Insulation R-value estimators. All math is exact and unit-tested. No account, no network — everything stays on your device. ### 1.3 — 2026-06-15 What's New - Version 1.1 Concrete Calculator - Compute exact cubic yards, cubic feet, and cubic meters for five pour shapes: rectangular slabs and pads, wall footings, round columns, tube forms (Sonotube), and stair step-blocks. Shows bag counts (60 lb or 80 lb bags at Quikrete-published yields), ready-mix cost range, and a quick-reference card with typical slab/footing/column specifications including IRC R403.1 footing minimums. Angle Math - A dedicated arithmetic tool for deriving angles from a known measurement: complement (90 A), supplement (180 A), bisect (A 2), double (A 2), A + B, A B, reflex complement (360 A), and A in radians. Capture Angle A or B live from the device's inclinometer with a one-tap lock, or type values manually. Preset buttons for 22.5, 30, 38, 45, 52, 60, and 90. Tap any result to copy it to the clipboard. Real Flatness Scan - The surface flatness scanner now uses the device's accelerometer to measure actual surface deviation as you slide the phone in an S-pattern. Deviations are mapped to a 96 heatmap (green = flat, red = dip, brass = hump) with live peak, valley, and RMS readings in millimeters. Previously this was an animated demo with no real measurement. ## Apps similar to Plumbline Studio | App | Rating | Price | Category | | --- | --- | --- | --- | | [Video Compressor: HEVC Shrink](https://appshunter.io/ios/app/video-compressor-hevc-shrink/id6762641868) | 3.4 (5) | Free | Utilities | | [VideoSnipper](https://appshunter.io/ios/app/videosnipper/id6755874566) | — | Free | Utilities | | [Bubble Level: Angle Finder](https://appshunter.io/ios/app/bubble-level-angle-finder/id6772273713) | — | Free | Utilities | | [Syver](https://appshunter.io/ios/app/syver/id6744258944) | — | Free | Utilities | | [HEIC to JPG Image Converter •](https://appshunter.io/ios/app/heic-to-jpg-image-converter/id6748909036) | — | Free | Utilities | | [WebClean: Ad Blocker and Dark](https://appshunter.io/ios/app/webclean-ad-blocker-and-dark/id6782481453) | — | Free | Utilities | ## More apps by Robert Corbin - [Daily Word Journey](https://appshunter.io/ios/app/daily-word-journey/id6761548266) - [Hush Secret Text](https://appshunter.io/ios/app/hush-secret-text/id6761658175) - [Renew Guard](https://appshunter.io/ios/app/renew-guard/id6761755447) - [Receipt to PDF](https://appshunter.io/ios/app/receipt-to-pdf/id6761782025) - [Route Your Pay](https://appshunter.io/ios/app/route-your-pay/id6761783719) - [Tip Arbiter](https://appshunter.io/ios/app/tip-arbiter/id6761786879) All apps by Robert Corbin: https://appshunter.io/developer/1890247992 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*