Best Codex Calc alternatives: apps like Codex Calc

10+ similar apps compared and reviewed

3.6 avg rating
6 free apps
Updated October 2026
Codex Calc
Codex Calc
Driftwood Studio Software LLC

Whether you want more options like Codex Calc or a completely different take on the same concept, our curated list of 10+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.

Top Alternatives to Codex Calc

5.0(2 ratings)
$0.99
Calx: Stack calculator screenshot 1
Calx: Stack calculator screenshot 2
Calx: Stack calculator screenshot 3

This calculator app utilizes Reverse Polish Notation (RPN) for efficient calculations by manipulating numbers on a stack. It offers a guided tutorial, gestural interaction, multiple keypads with various functions, and customization options for fonts and colors.