FlexCalc: Flexible Calculator

Name: FlexCalc: Flexible Calculator
Availability: InStock
Rating: 4.524752616882324 (22000 reviews)
Author: todayweather.co

todayweather.co

In-app purchases

22K reviews

Everyone

1M+

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Everyone

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About this app

FlexCalc is free forever, with no ads, no tracking, and no limits.

FlexCalc is a flexible calculator designed for editable calculations, linked values, history, and instant result updates.

Unlike a standard calculator, FlexCalc lets you tap any number or result, edit it directly, and see related results update automatically. You can reuse results in new calculation lines, drag linked values between lines, and adjust formulas without retyping everything.

Key features:
- Edit any number in your calculation and instantly update the result.
- Reuse results as linked values in new calculation lines.
- Drag linked values to replace, insert, or adjust calculations faster.
- Move the cursor inside numbers for precise edits.
- Review and restore previous work with calculation history.
- Share calculations as text or an image.
- Customize the app with different themes and fonts.
- Use scientific functions and custom constants when you need more than basic math.

FlexCalc is built to stay simple, fast, and distraction-free.

Edit, link, and reuse calculations with instant updates.

Updated on

Sep 5, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.

No data shared with third parties
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No data collected
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Ratings and reviews

21.1K reviews

A Google user

February 22, 2020

This use to work great before they started putting in ads, now it has a defect where after a few lines of entries you can't see the bottom (aka the active part) of the screen. I paid for the pro version, but that didn't help (the ads were gone, but the defect still exists). Too bad, this was one of the best calculators out there (with the exception that it never really did negative numbers). Hey devs, product manager .. this should be an easy bug to fix!!!

115 people found this review helpful

Erin Cardinal

September 20, 2026

Teal is my favorite color. This is a really good app, but I wanna be able to choose the "light cyan" theme and still have it be dark mode. All of the color themes should be available in light and dark mode. I would rate 5 stars and even buy a few of the support options if that was added. I also cannot seem to figure out how to delete all of the calculations at once, because even if I open the history and clear that, the rest of them stay on my screen.

todayweather.co

September 20, 2026

Hi Erin, thanks for the great feedback! We’ll share your suggestions about adding “light cyan” in dark mode and making theme options work consistently in both modes with our development team.

lana lana

October 22, 2026

The best calculator I've ever seen, it deserves to be rated 1000/10 everything inside of it amazing theme/ letters font etc And you can see all the calculations, wow ...much appropriated 😍💜🍃👏🏻!!

todayweather.co

October 22, 2026

Hi Lana! Thanks so much for your wonderful review. We’re really happy you’re enjoying FlexCalc’s design and how it shows your calculations. Your support means a lot.

What’s new

Version 3.0.1-3:
- FlexCalc is now available on iOS.
- Improved touch accuracy.
- Drag values to replace, insert, or reuse them.
- Move the cursor inside numbers for more precise edits.
- Added calculation history, with an option to turn it on or off in Settings.
- Added shortcuts for faster input and editing.

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