Construction Calc vs Tether

Designed by tradespeople, for tradespeople. Construction Calc Lite handles the heavy lifting of jobsite math—fractions, dimensional conversions, framing, and layout—so you can focus on the build. Whether you're a carpenter, concrete finisher, framer, superintendent, or DIYer, Construction Calc Lite delivers fast, accurate jobsite calculations with zero guesswork. WHY TRADES CHOOSE CONSTRUCTION CALC • True Feet-Inch-Fraction Math: Add, subtract, multiply, and divide in full dimensional fractions down to 1/16th (or user-set precision) with automatic reduction. • Seamless Unit Switching: Effortlessly mix Imperial and Metric. Convert feet-inch-fractions to meters, centimeters, or millimeters in a single tap. • Split-Screen Display: View decimal values, feet/inch fractions, memory registers, and scale factors simultaneously in large, high-visibility text. • Visual Cut & Layout Solvers: Dedicated modules for right triangles, miters, arcs, and baluster spacing complete with clear visual diagrams. • 50 Memory Registers & Full History: Never lose a cut list or measurement. Easily recall previous calculations on the fly. DEDICATED MODULES FOR EVERY TRADE • Framing & Layout: Calculate stud, fence post, and baluster spacing (horizontal, angled, or circular). • Miters & Trim: Visual miter and bevel angle calculator for crown molding and finish carpentry. • Geometry & Stairs: Instant solutions for right triangles, diagonals, rafter lengths, arcs, and chords. • Concrete, Volume & Area: Quickly calculate slab volume, footings, room square footage, and block/tank capacities. • Materials & Coverage: Estimate drywall sheets, tile, paint, and material costs with built-in waste allowances. • Smart Blueprint Scaling: Instantly scale plan drawings up or down to true field dimensions. BUILT FOR THE JOBSITE • High-Contrast Display: Large, legible fonts engineered for bright outdoor sunlight or dark crawl spaces. • Works 100% Offline: No cell service required on remote sites.

Tether is a short-lived group safety app built for events — stadium nights, music festivals, girls' nights out, school field trips, and any time you need your group to stay aware of each other without a permanent tracking circle. The host creates an event in seconds: name it, set a geofence radius on the map, and choose how long it lasts. Guests join by scanning a single QR code — no accounts, no contact list upload, no social graph. During the event, everyone sees each other on a shared map inside the halo. Alerts fire if anyone drifts outside the zone. The host sees a live activity log. When the timer hits zero, Tether stops tracking and wipes every location breadcrumb from every device. No permanent record. No data sold. No trail left behind. Key features: — Instant geofence around your venue — QR invite — guests join in one scan, no account required — Live group map with zone alerts — Auto-wipe: all location data deleted when the event ends — No marketing use, no data brokers, no third-party trackers — Battery-friendly: uses OS-level location triggers, not constant GPS polling