Starting in November 2025, CalcNote transitioned to an in-app subscription model.
All features of CalcNote Pro are now available through in-app purchases in the free version of CalcNote.
If you have already purchased CalcNote Pro, you do not need to pay again. You can continue using CalcNote Pro permanently with no additional cost.
In other words, CalcNote Pro will continue to be maintained as a lifetime-license edition alongside the free version.
For this reason, CalcNote Pro is priced very high. New users are strongly encouraged to use the subscription offered through the free version instead of purchasing this Pro edition.

CalcNote is a revolutionary calculator app designed for smartphones. It allows you to jot down calculations in a notepad-like interface, and the results are computed and displayed instantly—eliminating the need for pressing the equal button. You can write multiple calculations at once, enabling you to see numerous problems and their answers simultaneously. Adjustments to any part of your calculations are possible at any time without the need to start over; simply correct the mistaken part, and a recalculation occurs automatically. Merging the advanced functionalities of spreadsheet software with the convenience of a calculator, CalcNote represents the next generation of calculator apps, making it a must-have tool for quick and efficient calculations.

[A Fusion of Calculator and Notepad]
With CalcNote, you can input calculations as if you're writing a note, and computations are performed automatically. Calculations are always displayed, making it easy to spot any mistakes. Furthermore, you can jot down notes alongside your calculations, enabling you to compute text-mixed expressions like the examples below:

Example:

Shop A
USD 18 * 2 items + USD 4 (shipping)

Shop B
USD 19 * 2 items (free shipping) + 8% (sales tax)

Shop C
USD 18.30 * 2 items + USD 5 (shipping) - USD 2 (point redemption)

By keeping calculations and notes together, the purpose of your computations becomes clear at a glance when reviewing them later. Calculations and results can be saved as files, printed, or sent via email using Android's share function.

[Unique Uses of CalcNote]
- Comparing prices and calculating cost-effectiveness while shopping
- Managing daily household expenses and budgeting
- Estimating travel plans within a limited budget
- Executing complex calculations in multiple steps

[Catering to a Wide Range of Calculation Needs]
CalcNote supports various calculations for everyday life, business, and specialized fields like engineering:

- Percentage, inclusive, and exclusive tax calculations
- Unit and currency conversions
- Scientific, trigonometric, and financial functions
- Aggregate functions (sum, average, variance, standard deviation)
- User-defined functions (JavaScript)
- Logarithmic and natural logarithm calculations
- Permutations, combinations, and factorial
- Square, power, exponential, root calculations
- Maximum, minimum, median values
- Rounding methods and division operations
- Hexadecimal, octal, binary, and bitwise calculations
- Variable usage and result reuse

Disclaimer
burton999 is committed to providing high-quality, reliable, and accurate calculation tools through CalcNote. While striving to ensure the integrity and accuracy of calculations and information, results may vary based on inputs and contexts.
Users are encouraged to verify critical calculations independently. burton999 assumes no liability for damages arising from the use of CalcNote and is dedicated to continually enhancing the app to meet users' calculation needs.

CalcNote Pro - Math Calculator