Free online tools
and simple apps.

onething.tools is a small studio with free online tools and calculators that run in your browser, plus calm apps that each do one job.

Free tools and apps for contractors, homeowners, shift workers and anyone managing bills or focus.

BROWSE FREE TOOLS →MOBILE APPS

48

Free tools

Calculators and planners in your browser

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2

Mobile apps

Simple apps with one job

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2

Web apps

Apps with no download

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9

Guides

Short how-to articles

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THE COLLECTION

Made for the pocket.

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Desklings: Focus Timer app iconFocus timer

Desklings: Focus Timer

A cozy focus timer with little desk buddies, ambient sounds, and a garden that grows every round.

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Pebblet: One Task Jar app iconTask planner

Pebblet: One Task Jar

Drop tasks in a jar. Pebblet picks one that fits the free time before your next event.

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WEB APPS

Apps for the browser.

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FOR CONTRACTORS

Halfton

Local jobs from homeowners who already measured the project. Be the first to quote.

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FOR CONTRACTORS · FREE

ScopePad

Estimates and invoices on site, in minutes. Free, works offline on phone, tablet and computer.

New · Backup & sync to Google Drive or OneDrive

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FREE TOOLS

Small utilities.

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48 tools

Construction

Concrete Calculator

Cubic yards and bags of concrete for a slab, pad or footing.

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Construction

Gravel Calculator

Cubic yards and tons of gravel for any area and depth.

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Construction

Topsoil Calculator

Cubic yards, tons and bags of topsoil for any area and depth.

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Construction

Concrete Block Calculator

How many blocks and bags of mortar your wall needs.

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Construction

Wire Size Calculator

AWG for your amps, voltage and length, AC or DC.

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Construction

Fence Calculator

Posts, rails, pickets, concrete and cost for your fence.

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LATEST GUIDES

Read and learn.

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What Is a Change Order? Definition, When You Need One, and Template Fields

A change order is a written agreement to change a construction contract's scope, price or schedule. Learn when to use one and what fields a template needs.

Construction Estimate Template: What to Include and How to Write One

A contractor estimate template broken down: what every construction estimate must include, a sample line-item layout, and the steps to write one clients accept.

Handyman Rates: How Much Should a Handyman Charge (Hourly vs Per Job)

How to set handyman rates: hourly vs per-job pricing, minimum charges, trip fees, and how to work out the rate you need so the business actually pays you.

ABOUT ONETHING.TOOLS

We believe software should give attention back, not ask for more.

01

One clear job per app.

02

Thoughtful by default.

03

Built to last a while.