Derivative v0.7 (26/05/2014) released, available at OpenRepos.net, with :
- disabled automatic upper case in virtual keyboard;
- numeric filter in '#' input fields;
- "Settings" menu implemented with many options :
* show not calculated derivative;
* show calculation time;
* numerical approximation with arbitrary number of digits (default is 15, but can be thousands of digits);
* 5 simplification methods (none, expand terms, simplify terms, expand all, simplify all);
* 7 output types (simple, bidimensional, LaTeX, C, Fortran, Javascript, Python/SymPy);
- portrait and landscape modes in all screens.
This Sailfish version still doesn't have all the features of Derivative for Maemo 4 & 5.
Newer releases of Derivative will have more features (gradient, divergence, curl, laplacian, etc).

New Screenshots of Derivative on Sailfish.

Calculating a derivative with respect to x twice :

Settings has many options :

Help on Derivative is also updated :


See the 1st post about installing Derivative on Sailfish.