CalcFlex

CalcFlex is a fully customizable feet, inches, and fractions calculator designed for anyone working, learning, or building with measurements—perfect for students, carpenters, engineers, blue-collar workers, DIYers, and hobbyists.
No ads. No paywalls. No in-app purchases.
Unlike other calculator apps that charge to remove ads or unlock features, CalcFlex gives you the full experience—forever, with all future updates included.

Key Features:

- Enter values like 5' 7 3/4" or 3.208 ft and convert between formats.
- Easily input detailed calculations like 6' 2 1/2" + 3' 1/8" and get clean, accurate results.
- Choose how detailed your fractions go—from 1/2" to 1/64".
- Customizable colors, with theme presets inspired by popular standard calculators, along with other fun themes. Easily create your own with full color control for each button group.
- All the usual calculator functions like sin, cos, tan (and inverses), square roots, and powers. Additionally includes right triangle solvers (e.g. hypotenuse and missing leg) and functions to quickly step forward/backward by the current value—great for repetitive layouts.
- Tappable history organized by “Today,” “Yesterday,” and “Last 7 Days.” Tap any entry to reuse.
- Clean, intuitive UI with a familiar, responsive design makes it easy to pick up!

Whether you’re solving a trig problem, laying out a project, measuring a room, or cutting lumber, CalcFlex gives you precision, clarity, and full control.
Thanks for choosing CalcFlex!