Slate: Calculator

Zone7 Studios

In-app purchases

About this app

Slate is seven everyday calculators in one, dressed in chalk on a slate board — keys that click like they mean it, and everything you actually need, nothing you don't.

SEVEN TOOLS, ONE KEYPAD
• Calculator — basic for everyday sums; one tap opens the scientific keys: trig and inverses, logs, roots, powers, factorials, π and e, degrees or radians. Percent works the way desk calculators always have (50 + 10% is 55), and the tape above the display remembers recent results — tap one to use it again.
• Percent — discounts, markups, tips-of-the-tongue "what percent of what" sums.
• Date — days between dates, add or subtract days, work out an age.
• Tip — split the bill fairly, down to the cent. (Pro)
• Units — length, weight, volume, temperature and more. (Pro)
• Loan — repayments and total interest at a glance. (Pro)
• GST — add it to a quote or pull it out of a total, at any rate. (Pro)

Every tool runs on the same skinned keypad — the system keyboard never appears.

SKINS THAT CHANGE EVERYTHING
Slate ships in chalk. Slate Pro re-dresses every tool: Ledger's paper and ink, Terminal's green phosphor glow, Porcelain's clean white, Ember's warm coals, Drift's dusk violet, Blueprint's cyanotype lines. Every skin pairs with its own key sounds — Typewriter (with a carriage bell on equals), Beeps, Droplets, Woodblock, Hush and Abacus.

CAST IT
Put your working on the big screen: cast to a TV and Slate mirrors whichever tool is up — same numbers, same skin — while your phone stays the keypad. Walk away and an idle cast tidies itself up after a few minutes.

CALM ABOUT EVERYTHING ELSE
• No ads · No accounts · Nothing tracked · No permission prompts
• Works offline: everything ships inside the app.
• The only times Slate touches the network are Google Play's billing for the one-time purchase, and casting to your TV if you use it.

PAY ONCE, OWN IT
Slate is complete without paying: the full basic and scientific calculator, Percent, Date, the tape, the chalk board and its key sounds. Slate Pro is a single one-time purchase that unlocks the other four tools and every skin and sound set — including the ones we add later. No subscription, ever.

From Zone7 Studios, maker of Ethereal, Brume, Sylph, Lore and Pier.

What’s new

Minor updates and enhancements.