This application performs a linear adjustment of the data supplied in X Y format. First, the data for X are entered in one cell and the data for Y in another cell. Numbers must be written separated by commas and without white space. The point is the decimal symbol. Numbers can be entered in decimal or exponential notation (0.000345 or 3.45e-4). Pressing the "Fit and Paint" button performs the linear fit. The application calculates the line Y = m * X + b that best fits (by least squares) to the data and displays the value of the slope "m" and the ordinate at the origin "b". The errors of these magnitudes and the correlation coefficient that indicates the goodness of the fit are also shown. The graph that includes the data and the fit line is also shown. Titles can be added to axes. By pressing the "Save and send" button, the graph will be sent using the available resources of the device.