Home & Lock Screen Widgets
A suite of resizable widgets that keep quick maths and recent results one glance away.
Calc ±
Everyday maths, right on your Home Screen.
A fast, friendly calculator paired with a suite of resizable Home & Lock Screen widgets, so quick sums, recent results and handy conversions are always a glance away.
Get it onGoogle Play
Coming soon toApp Store
Calc ± Smart Widgets
Get in touchCalc ± Smart Widgets is our own calculator app for Android and iOS, reimagined around the Home Screen. Alongside a clean everyday and scientific calculator, it ships a suite of resizable widgets that surface quick maths, recent results and handy conversions.
The result is a calculator you barely need to open, essential numbers stay one glance away on your Home and Lock Screen, while a fast, gesture-friendly interface handles everything from a quick tip split to a full scientific calculation.
Basic & Scientific Modes
A clean everyday calculator that expands into full scientific functions when you need them.
Live History Tape
Every calculation is saved to a scrollable tape, so you can revisit, copy or reuse any result.
Quick Converters
Built-in currency, unit and percentage conversions for everyday sums without switching apps.
Themes & Dark Mode
Personalise the look with multiple colour themes and a crisp dark mode for low-light use.
Haptics & Gestures
Tactile feedback and swipe-to-delete gestures make fast, error-free input feel effortless.
The purpose behind this
Most calculators make you stop, unlock, hunt for the app and start typing. Our goal was to remove that friction, to turn the humble calculator into an ambient tool that lives on the Home and Lock Screen. By combining a genuinely fast calculator with a flexible widget system, Calc ± keeps the numbers people reach for most within a single glance, on both Android and iOS.
End-to-End Journey
From concept and interface design through to native widget engineering and store launch, Calc ± Smart Widgets is designed, built and maintained entirely in-house. Live now on Google Play with the iOS release on the way, it is an ongoing HK Infoway product, refined release after release around how people actually use a calculator every day.
Our own product
Designed, built, owned & operated entirely by HK Infoway.
50K+
Installs on Google Play, with the iOS release on the way.
4.7 ★
Average user rating, praised for its widgets and speed.
Mobile application
A calm, focused interface built for speed, large tap targets, an at-a-glance history tape and instant access to scientific functions and converters. The widget suite carries the same design language straight onto the Home and Lock Screen.
iPad application
On the larger canvas, Calc ± makes full use of the extra space, a roomy keypad, a persistent history tape and side-by-side widgets that turn the iPad into a genuinely useful desk calculator.
