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About
Fit curves to your data using various models directly on a calculator-style keypad. Instantly see the coefficient of determination (R²) and a graph of your points and the fitted curve. Useful for scientific reports, statistics, and trend analysis.
✓Calculator-style keypad for data entry
✓Real-time R² calculation
✓Interactive graph of data and fitted curve
✓Multiple curve fitting models (Linear, Quadratic, Exponential, Logarithmic, Power)
✓Graph manipulation (zoom, pan, reset)
✓Point deletion and coefficient copying
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What's New in Least Squares Calculator
3.0.0
November 4, 2026
Rebuilt from the ground up. • New fit models: quadratic, exponential, logarithmic and power • Coefficient of determination (R²) • Tap a coefficient to copy it • Support for the latest iOS
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FAQ
What curve fitting models does Least Squares Calculator support?
Least Squares Calculator supports Linear (y = ax + b), Quadratic (y = ax² + bx + c), Exponential (y = a·e^(bx)), Logarithmic (y = a·ln x + b), and Power (y = a·x^b) models.
How does Least Squares Calculator display results?
It displays the coefficient of determination (R²) and an interactive graph of your data points along with the fitted curve. The graph can be zoomed and panned for detailed inspection.
Does Least Squares Calculator save my data?
No, entered data is not saved after you close the app. Your numbers stay on your device and no account is needed.
What devices is Least Squares Calculator available on?
Least Squares Calculator is available on iPhone, iPad, and iPod devices.
How often is Least Squares Calculator updated?
The app was last updated on November 4, 2026, with version 3.0.0. The release date was December 19, 2017.
Does Least Squares Calculator have ads?
Yes, the app shows banner advertisements.
What is the age rating for Least Squares Calculator?
Least Squares Calculator has an age rating of 4+.
Can I export my data or graphs from Least Squares Calculator?
The description does not mention any export functionality for data or graphs. Coefficients can be copied by tapping them.
