Observed arrival · 2026-08-31
Onsite Math, for the Fractions That Don’t Fit in a Spreadsheet
An offline construction calculator for feet, inches, fractions, rafters, spacing, plan scales, material costs, and job reports.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
Field notes
The product organizes six construction workflows around a common calculate, save, and share sequence. Its example adds 12′ 7⅜″ to 8′ 11¾″ and returns 21′ 7⅛″, alongside decimal-foot and metric conversions. The site also describes estimates that include waste, labor, tax, and unit costs, plus job-linked PDF reports. It claims 38,793 automated calculation checks and presents offline, on-device storage as part of the operating model.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue