Chirp Access vs KerfCalc

Chirp is a smart access solution for individuals living in multifamily and student housing communities. Chirp enables you to open any door, gate or garage using a mobile device and makes it easy to remotely grant access to friends, guest and service providers. Chirp liberates both residents and property management from the key and fob access nightmare. Use of the app requires Chirp-compatible hardware to be installed at your building. To learn more about our products visit www.chirpsystems.com.

KerfCalc is a set of woodworking calculators for the weekend workshop. Clean, fast, and built for the way woodworkers actually measure: in fractions. No ads. No accounts. No subscription. Works with no signal at all. BUILT FOR FRACTIONS Type 1-3/4 the way you'd say it. A custom keypad puts the fraction keys where your thumb already is, with shortcuts for the sixteenths and eighths you use constantly. Every calculation stays exact — no decimal drift, no 0.749999 where 3/4 belongs. Switch the whole app to millimetres whenever you want, and it remembers. FREE TOOLS • Converter — fractions, decimals and millimetres, three ways • Board feet — with a running tally and a cost estimate at your price per board foot • Shelf spacing — even divider positions, marked from one end so errors can't accumulate • Screws & pilot holes — the pilot and countersink size for every screw gauge, by wood hardness UNLOCK EVERYTHING — ONE PAYMENT • Cut list optimizer — for boards and for sheet goods. Counts the blade. • Saved cut lists — name a job and come back to it • Board inventory — what's actually in your rack, with total board feet • Stain & finish — how much to buy, coats and waste buffer included • Joinery reference — dovetail slopes with angles, box joints, proportion rules • Golden ratio — harmonious proportions from a single dimension IT COUNTS THE KERF Four 24-inch pieces from a 96-inch board sounds like it fits. It doesn't — three cuts at 1/8" each eat 3/8", and the fourth piece comes up short. KerfCalc plans around the blade, for boards and for full sheets, and shows you the layout. IT KNOWS A 2x4 ISN'T 2x4 Tap a nominal size and you get the real one: 1-1/2 x 3-1/2. Getting that wrong is the fastest way to build a carcass an inch off. HONEST NUMBERS When a value can't be marked on a tape, KerfCalc says so rather than pretending. When there are two right answers —what the lumberyard charges versus what you can actually cut — it gives you both. Everything stays on your device. Nothing is collected, and nothing is sent anywhere.