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GRIDCALC

The RPN Spreadsheet. Structured for Clarity.

Every input and operation stays visible in the execution grid, so you can inspect any step, edit upstream values, and recompute instantly with exact arithmetic.

Download on the App Store Watch Demo on YouTube

Visible Program Model

Every step is a cell, so calculations stay inspectable and editable.

Cell-Based Reusability

Reference prior values directly to build modular, repeatable workflows.

Exact Arithmetic

Constructive Reals in GridCalc avoid floating-point drift in critical calculations.

GridCalc on iPhone with bezel

What Users Are Saying

"The design is slick, and it really does feel right at home on a portable device... The app launches instantly... nothing comes close on cold launch. Great work!"

Built for Fast, Reliable Scratch Modeling

GridCalc is a persistent, structured RPN calculator built on an execution grid. Every committed action lives in a concrete cell, so the grid itself is the program and execution order is always explicit.

That means you can move fast without losing context: enter values, apply operators, inspect any cell, edit upstream inputs, and watch downstream results recompute deterministically. References are first-class, so reusable models stay readable instead of collapsing into formula-bar complexity.

For precision-sensitive work, GridCalc uses exact arithmetic (constructive reals) and configurable notation/grouping/precision controls. You get high-fidelity results with display flexibility, not hidden value mutation.

  • Visible execution flow with no hidden stack or history view
  • Deterministic recompute after edits, inserts, deletes, or retargeted refs
  • Advanced operator set: trig/logs, constants, stack transforms, and scientific entry
Download on the App Store Watch Demo on YouTube
Download GridCalc