Chimney TopDigital Services

About

About Chimney Top Digital Services

Chimney Top Digital Services is a small software studio in East Tennessee. We make practical tools for people who keep their own books, run a small trade or business, play an instrument, or just spend their day in a browser: web apps, calculators, browser extensions and spreadsheet templates that do one job well and explain how they work.

Who we are

Chimney Top Digital Services is the trading name of Steven Michael Barber, a sole proprietorship based in Tennessee. Steven Michael Barber designs, builds and supports every product, so when you write to us, the person who made the product reads your message and replies.

What we make

Available apps, calculators and templates: Chimney Top Calculators, Cash Flow Positive, Practice Log, Chimney Top Books, Contractor Suite, EZCapsule, QnA MD, Sheets templates for small trades.

Available browser extensions: Tab Link Copier by Chimney Top, Window Organizer by Chimney Top. Each is free, with an optional Pro upgrade.

Browse the product catalog for features, prices and demos.

Background and guides

Steven Michael Barber's background includes radiation measurement and safety software at Pajarito Scientific (2000–2008), AMETEK ORTEC (2008–2020) and Mirion Technologies (2020–2026). That experience informs the radiation guides and calculators.

He is a software engineer and engineering manager, not a certified health physicist. The radiation tools and guides provide educational estimates from published sources; they are not signed off by a licensed professional. Each page explains its limits and appropriate use.

We use AI tools to help draft and review guides and check worked examples. Those checks can miss errors and are not independent professional review. Each guide lists its sources and update date. If you find an error, please tell us.

How we work

  • Plain prices. Every price is on our pricing page, in US dollars. Stripe is the merchant of record for our orders. Your first payment for a product is covered by our 14-day refund policy. Renewal payments and later purchases are excluded.
  • Your data stays yours. Each product has its own privacy policy that says what it stores and why. We don't sell personal information. See our privacy policy for this website.
  • We measure before we claim. Our CTDS Local AI Lab series reports how we test local AI models on our own hardware, with the raw numbers and the limits of each test.
  • Clear terms. Our website terms, each product's terms and our license terms for the extensions and templates are written to be read.

Contact us