# Line-Fit — Straight Line Regression Fit

> Linear regression tool for modeling relationships between two variables. (iPhone/iPad app by Bjarne Berge.)

- Source: https://appshunter.io/ios/app/line-fit/id1448053643 (this page in markdown: same URL + `.md`)
- Developer: [Bjarne Berge](https://appshunter.io/developer/1209858941)
- Category: Productivity, Utilities
- Price: Free
- Rating: 3.67/5 from 3 App Store ratings · 1 written reviews indexed
- Age rating: 12+
- Requires: iOS 15.6 · 1 MB
- Languages: English
- Released: 2019-06-15
- Data updated: 2026-06-11
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/line-fit/id1448053643/reviews.md

## What is Line?

The Line-Fit app uses linear regression to model the relationship between two variables (x and y) by fitting a linear equation to observed data. One variable is considered to be an explanatory (independent) variable, and the other is considered to be a response (dependent) variable. 

A linear regression line has an equation of the form Y = a + bX, where X is the explanatory variable and Y is the dependent variable. The slope of the line is b, and the intercept is a (the value of y when x = 0).

To measure the association between the two variables the correlation coefficient is used, which is a value between -1 and 1 indicating the strength of the association of the observed data for the two variables.

The coefficient of determination, R2, measures how close the data are to the fitted regression line.  In general, higher values of R2 indicate a better fit of the model to the given data.  R2 is always positive and equal to 1.0 for a perfect fit.

## Key features

- Linear regression modeling
- Calculate slope and intercept
- Correlation coefficient calculation
- Coefficient of determination (R2)
- Model fit assessment

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/line-fit/id1448053643/reviews.md

### 1/5 — Probably doesn’t work

*2021-09-28*

I got this app because my school calculator broke and this is absolutely horrendous every time you enter the app it starts off with a new randomly generated line which wouldn’t be that bad if there was an option to clear but there isn’t so you either have to edit it and delete each individual coordinate before writing in a new one or just delete all the coordinates you can then try to work with their system and even after typing in all the correct coordinates it doesn’t show the coordinates in the correct place

## Frequently asked questions about Line

### What is Line-Fit used for?

Line-Fit is used to model the relationship between two variables using linear regression. It helps you understand how one variable changes in relation to another and assesses the strength and accuracy of that relationship.

### What are the key calculations performed by Line-Fit?

Line-Fit calculates the slope and intercept of the regression line, the correlation coefficient to measure association strength, and the coefficient of determination (R2) to indicate how well the model fits the data.

### What devices does Line-Fit support?

Line-Fit is available for iPhone, iPad, and iPod devices, making it accessible for users on Apple's mobile ecosystem.

### How often is Line-Fit updated?

The latest version of Line-Fit is 3.0, and it was last updated on February 9, 2026. This indicates a recent update, suggesting ongoing development and support.

### What is the age rating for Line-Fit?

Line-Fit has an age rating of 12+, meaning it is considered appropriate for users aged 12 and older.

### Does Line-Fit have ads?

No, Line-Fit does not contain advertisements. As a free application, it provides an ad-free experience for its users.

### What is the user sentiment for Line-Fit based on its rating?

Line-Fit has a rating of 3.7 stars from 3 ratings. This suggests a generally positive but not overwhelmingly enthusiastic user reception.

### Can Line-Fit be used for complex statistical analysis?

Line-Fit focuses specifically on linear regression for two variables. For more complex statistical analyses involving multiple variables or advanced techniques, users might need to explore more comprehensive statistical software.

## Version history (last 3 releases)

### 3.0 — 2026-02-09

Updated with Xcode 26.

### 2.0 — 2020-11-15

Upgraded to SDK 13
Minor bug-fixes
Added 'Share' button to enable sharing, saving, printing of results
Changed color-scheme to work in Dark Mode
Updated layout and fonts to work better with iPads (better layout/larger fonts)

### 1.0 — 2019-06-14

No release notes.

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## More apps by Bjarne Berge

- [Gas-Liquid Leak](https://appshunter.io/ios/app/gas-liquid-leak/id1209858942)
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- [Curve-Fit](https://appshunter.io/ios/app/curve-fit/id1450077815)

All apps by Bjarne Berge: https://appshunter.io/developer/1209858941

## Related topics

[bjarne berge](https://appshunter.io/ios/topics/bjarne-berge)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*