VibeCalc: Voice Builder App

INDigital

About this app

VibeCalc is a construction calculator built for people who work with their hands.

Twenty-three calculators across framing, decking, railings, roofing, boards, finishes, and concrete — all in one app. Hold the mic and speak your measurements, or type them in. Works fully offline, on the jobsite, in the basement, under the roof, anywhere your signal doesn't reach.

Free. No ads. No subscriptions. No accounts. No tracking. One version for everyone.

AI VOICE THAT ACTUALLY WORKS OFFLINE

This is what most "voice" apps quietly skip. VibeCalc runs a real AI speech model entirely on your phone — no cloud round-trip, no waiting for signal, no audio ever leaves the device. Hold the mic, speak naturally — "twenty length thirty width forty depth" — and watch the fields fill in real time. Tuned for construction vocabulary, so "sixteen on center" and "two by six" land correctly without you talking like a robot.

WHAT'S INSIDE

Framing
• Wall studs
• Wall framing with doors & windows (advanced stud count)
• Rake walls (gable ends)
• Plywood sheathing

Decks & Rails
• Deck boards
• Baluster spacing
• Deck railing posts

Roofing
• Rafter length
• Roof pitch
• Roof shingles
• Ridge height
• Roof overhang
• Lean-to rafter
• Valley rafter
• Rafter cut angles

Concrete
• Concrete (footings & slabs)
• Strip footings

Stairs
• Stair stringers

Boards & Finishes
• Drywall sheets
• Tile
• Paint
• Insulation
• Board feet (lumber takeoff)

OFFLINE BY DESIGN

Everything runs on the device. No cloud. No API calls. No waiting for a connection. Open the app in a concrete basement or on a roof and it works the same as in your kitchen.

NINE LANGUAGES

English, German, Spanish, French, Italian, Dutch, Polish, Portuguese, Albanian. Auto-detected from your system language. Voice input is English-only for now.

IMPERIAL AND METRIC

Switch freely or let the app pick from your locale. Fractions display the way you'd write them on a board.

PRIVACY

VibeCalc doesn't collect anything. No analytics. No identifiers. No network requests. The microphone is only used while you're holding the voice button, and the audio never leaves the device.

SHARE WITH YOUR CREW

Built-in share button. One tap to send VibeCalc to anyone — WhatsApp, SMS, email, whatever. Because the best construction tool is the one your whole crew has.

WHY IT'S FREE

Because charging for a calculator wasn't worth the friction it added. If the app saves you time and you want to say thanks, there's a donate page at vibecalc.app/donate — completely optional, never asked for inside the app.

BUILT BY ONE PERSON

Made by a working developer who got tired of bad construction calculators. If something's broken or a calculator you need is missing, the contact details are on vibecalc.app — real replies, usually within a day.

Made with care. https://vibecalc.app/

What’s new

AI voice now works offline. No signal needed.
This release builds in on-device AI speech recognition designed for
construction vocabulary. Hold the mic - say "twenty length thirty
width forty depth" - fields fill in real time. Works in basements,
under steel roofs, anywhere without signal. No cloud, no data sent
anywhere, no tracking.
23 calculators in total:
Plus a Share button — send VibeCalc to your crew in one tap.