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KLO Calculator

Support

KLO Calculator is a calculator for site and office.

  • A basic and scientific calculator with a tape of every answer.
  • Convert: length, area, volume, weight, pitch, currency and more, with feet and inches.
  • Construction: 77 calcs, from concrete and bricks to stairs, drains and Part L, with checks against the Approved Documents for England.
  • Notepad: name a figure once and use it on the lines below.
  • On iPhone, iPad and Mac, and in a web browser.

Getting help

Email [email protected]. Tell us:

  • which device you use;
  • which screen and calc you were on, and what you typed;
  • what the app said, and what you expected.

A screenshot helps.

Common questions

Can I type a sum in a box?
Yes. Every box takes a sum: 2400 + 150, 1722 × 2. You can also type the box's own unit after the number, such as 10% in a waste box or 150mm in a millimetre box.

It says "Use a point for decimals".
KLO Calculator uses a point for decimals and a comma only between thousands: 1.5, and 1,234.5. On a keyboard set up for a comma decimal, the comma key types a point.

Can I use my supplier's figures?
Yes. In a construction calc, switch What you know to Supplier figures, or set them all in Settings › Supplier figures. Leave a box blank to keep the trade figure.

Some construction sections are missing.
Settings › Construction: sections shown turns sections on and off. In the calc list, a section's heading folds it away.

Are the checks enough for Building Control?
No. They follow the Approved Documents for England and are a guide, not a design. Building Control, an engineer or an electrician has the final word. Wales, Scotland and Northern Ireland have their own rules.

The currency rates are old.
They're the European Central Bank's reference rates, published each working day around 16:00 CET. With no connection, the app shows the rates last loaded and their date. Press Refresh rates in Settings › Currency to try again.

Does my tape move between my phone and my Mac?
Not yet. Each device, and each browser, keeps its own.

The web page has lost my tape.
The page keeps everything in that browser. Clearing the browser's site data removes it, and a private window doesn't keep it. If the page says it can't read its saved data, Reset saved data clears it so the page works again.

What's free, and what does the subscription add?
Ten calcs work fully for free: areas, dig, paving, concrete, masonry, stairs, roof, PV, plaster and paint. The other 67 show worked example figures. The subscription (£2.99 a month or £24.99 a year, VAT included) unlocks every calc, saved jobs and PDF reports, on Mac, iPhone, iPad and the web.

How do I cancel?
Bought in the app: in your Apple Account settings (Subscriptions). Bought on the web: Settings › KLO account › Manage subscription on the web page. Either way, editing stays open until the end of the period you've paid for.

How do I get a refund?
Bought in the app: Apple handles refunds; ask at reportaproblem.apple.com. Bought on the web: email us within 14 days of buying for a full refund (see the terms).

I've subscribed but the calcs are still locked.
In the app, press Restore Purchases on the subscription screen or in Settings › Subscription. If your subscription is held by your KLO account, sign in to the same KLO account in Settings › Subscription.

How do I delete my KLO account?
In the app: Settings › Subscription › Delete KLO account…. Or email us. Your calcs, jobs and notes on your devices are not touched. The same KLO account is used by other KLO apps, so deleting it erases it for all of them. If you are the last owner of a company in another KLO app, you're asked to hand it on or delete it first. A subscription bought on the web is cancelled when the account is deleted; an App Store one is cancelled in your Apple Account settings.

What does KLO keep?
Nothing you type. The privacy statement explains what is kept where.

Privacy and terms