• Stair calculations per TCVN 13967:2024, with the Vietnamese step-cycle count.<br>• One tap to read any result in metric.<br>• Fixed wrong stair pitch and hip-roof angles.<br>• Fixed: “3,5” could not be entered; the cut list now survives rotation.
1.11.3Oct 31, 2026
• Stair calculations per TCVN 13967:2024, with the Vietnamese step-cycle count.<br>• One tap to read any result in metric.<br>• Fixed wrong stair pitch and hip-roof angles.<br>• Fixed: “3,5” could not be entered; the cut list now survives rotation.
1.9.1Oct 21, 2026
• Stair calculations per TCVN 13967:2024, with the Vietnamese step-cycle count.<br>• One tap to read any result in metric.<br>• Fixed wrong stair pitch and hip-roof angles.<br>• Fixed: “3,5” could not be entered; the cut list now survives rotation.
1.4.0Sep 20, 2026 · seen Sep 29, 2026
• Stair calculations per TCVN 13967:2024, with the Vietnamese step-cycle count.<br>• One tap to read any result in metric.<br>• Fixed wrong stair pitch and hip-roof angles.<br>• Fixed: “3,5” could not be entered; the cut list now survives rotation.
Carpenter Calculator: Ft-In is a tools app by FighttechVN with 10+ downloads (about 14 estimated). Released Sep 10, 2026. Install growth, rank history, SDKs and ad networks.
From the store listing: “Carpenter Calculator is a feet-inch-fraction construction calculator built for the job site: a dedicated ft-in keyboard, exact fraction math, stair and rafter layout, board feet and a cut-list optimizer. Calculations work offline, no ads, no account.
It handles feet and inches directly, and result rounding is…”
