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Maths Information Plus Solvers provides general mathematical information sheets plus a range of equations solvers/calculations in the maths fields of Geometry, Statics,Series,Proportional Lengths,Interest,Areas and Volumes. Also operations between square matrices can be proformed (multiply, Addition, Subtraction, Transpose) as well as Linear Equations solving using the Jacobi Interation method.General settings can be made for the program and  for the Jacobi Interation method. The App is easy to use with a tab/swipe layout design. The About/Help tab offers a simple web browser. For the linear solvers using the Jacobi method requires setting the initial variable estimates and the number of interations. On display of the results a Error value is also displayed next to the variable value. The error is the difference between the displayed and previous variable value. Generally the smaller the error value the more accurate is the result. Matrices can be saved, emailed, downloaded to file and reopened. Directly from the main screen various Maths categories can be selected from the top downdownlist box. After selecting a category, select the approperiate sub category, to display the information, solve variables of a selected equation . Below the Maths - Geometry category has been selected and the straight line equation to be solved. Simply check (Tick) the box of the variable to be solved, click the calculate button and in the case below the x value is solved. After selecting a category, select the approperiate sub category, to display the information, solve variables of a selected equation . Below the Maths - Geometry category has been selected and the straight line equation to be solved. Simply check (Tick) the box of the variable to be solved, click the calculate button and in the case below the x value is solved. Use the keypad to enter values into the edit fields. Click on a field and click on the keypad. The calculate button has the calculator display and green border. Use the back and X button to back delete and clear the selected edit field. Matrices Tab :- Allows the manipulation of square matrices from 2 to 10 and also the solving of linear equations using the Jacobi Interation method. For matrices calculations. Select the required square matrix from the dropdown list selector. From the image below, a 3x3 matrice has been selected. Matrix 1 is on the left of the ||= sign and matrice 2 is to the right. Each line is 1 row of the matrice and each column is separated by the comma ",".  Use the keypad to enter values into the edit fields. Click on a field and click on the keypad. The calculate button has the calculator display and green border. Use the back and X button to back delete and clear the selected edit field. For matrix operations use the m+m button to add the matrices together, use the m-m button to subtract, mxm to multipy, use the m1T and m2T to find the transformation of each matrice. (the calculate button is not used). Save button saves the entered matrices. Use the download to save the matrices to file, email and reopen a saved matrice can also be done. Linear Solver :- To setup the linear equations. Select the square matrice, enter the matrice on the left side of the ||= symbol and only enter the value on the right side of the ||=. See the screen shot. Click the calculate button, (calculator dislay with green border) in the keypad to solve the equations. The results will be displayed as x,y,x1,y1 etc as the variable names. For the linear solvers using the Jacobi method requires setting the initial variable estimates and the number of interations. These initial estimates can be entered for each variable in the settings tab. The initial defaults are 0. On display of the results a Error value is also displayed next to the variable value. The error is the difference between the displayed and previous variable value. Generally the smaller the error value the more accurate is the result. Settings :- To change the number of decimal points behind a calculated value, select a value from the dropdownlist box. Check the checkbox to have Engineering form results notation displayed. Scroll interactions number picker to set the amount of interations for the Jacobi method. To set initial estimates values, scroll to the required estimate variable i.e. x1 and then scroll the adjacent number picker to the required value (0-100). Do the same for any other x value. Values will be saved on scrolling. The reset button will reset to the default values.