Play it through - until it fits

3% more salary — but never less than 300.
12% tip — capped at 10, split by 5.
10 for the price of 9 — what if it’s 8?
Net 199 — what does that look like gross?
ROI, fees, discounts — move the line until it works.

Watch Outcomes Unfold

Up and down Stepper-buttons allow quick modifications of the calculation and instant update of the result. Choose between five predefined incremental units and gain full control by how much you want to fine tune the result.

Turn the Question Around

Swap result. Reverse perspective. And explore the other side of the equation.

Small in Size. Great with Numbers

This is a precision tool for percentage-based thinking:

• Growth rates
• Compounding Interest (with KPI's)
• averages with split function (AAGR, CAGR, etc.)
• Returns and response rates
• Discounts, rebates, margins
• Taxes, VAT — in both directions
• Interest, debt, savings goals
• Quantity and Volume metrics

System Requirements (as of 2026)

Compatible to Apple Watch Series 4 or newer with WatchOS 10.6+ and runs independently from the iPhone, no internet connection or connectivity required. The companion iPhone app includes calculation examples.

New Features for Version 1.3 (2026-01a)

• 14 possible presets for the new Split-Favorite addition
• Split value reset (to /2)
• 3 presets to pick for the bar chart markings (25, 20 or 10 ticks)
• New added localizations

New Features for Version 1.4 (2026-01b)

• Switch values on screen 2
• Extended and redesigned manual

New Features for Version 1.5 (2026-01c)

• New Compounding Chart View witch cycle-stepper
• Invert numbers in the numpad-display
• New backspace in the numpad

New Features for Version 1.6 (2026-06a)

• Fraction visualizer (bubble & donut charts) for screen 2
• Updated manual

New Features for Version 1.7 (2026-06b)

• The complication now shows the calculation steps, based on the last used calculator
• Set a custom favorite percentage in Calculator 1 settings
• Updated manual