CalcBoard / Split-Screen Calculator

The Split-Screen Calculator iPhone Doesn't Have Built In

iOS won't run two copies of the Calculator app, and iPhone has no split screen at all. CalcBoard solves it at the app level: one calculator app that splits itself into 2–8 independent panels.

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Why you can't split-screen the built-in calculator

On iPhone, iOS has no split-screen multitasking — one app owns the screen. On iPad, Split View exists, but iPadOS won't open two copies of the same calculator app side by side, and for years iPad famously shipped with no calculator at all. So the obvious idea — "just put two calculators next to each other" — has no system-level answer.

CalcBoard is the app-level answer. It splits itself: every panel is a complete, independent calculator, and the layout adapts to your screen.

A layout for every screen

  • iPhone portrait: a focused active panel with fast tab switching between your open panels.
  • iPhone landscape: panels arranged side by side — a literal split screen.
  • iPad: 2–3 panel grid layouts with drag-to-reorder, plus full iPadOS Split View so CalcBoard can sit next to Safari, Numbers, or your homework PDF.
  • Every panel remembers its state. Rotate, resize, or switch away — expressions and results survive.

More than a visual split

A genuine split-screen calculator needs the two sides to talk. CalcBoard's Premium shared value tray carries results between panels (up to 50 stored values), and named variables like rate=7.25 work across every panel and mode. That's the difference between two calculators that happen to be adjacent and one workspace with multiple calculators in it.

CalcBoard on iPad showing a multi-panel calculator grid in landscape
Grid layout on iPad — plus iPadOS Split View alongside other apps

Frequently Asked Questions

Does iPhone have a built-in split-screen calculator?
No. iPhone has no split-screen multitasking, and the built-in Calculator app shows one calculation at a time. CalcBoard works around this by splitting itself into up to 8 independent calculator panels inside one app.
Can I use CalcBoard in iPad Split View?
Yes. CalcBoard supports iPadOS Split View, so you can run its multi-panel layout next to another app — a browser, a spreadsheet, or class notes — and it also supports pointer/trackpad input on iPad.
How many panels can I open at once?
2 panels free, up to 8 with Premium ($2.99 one-time). Each panel runs its own mode: basic, scientific, programmer, or unit converter.

Split your calculator, not your attention

Free on iPhone and iPad. Two panels included — no ads, ever.

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