Version 1.0 was submitted to Apple on the 7/24/2008 and approved a few days later.
I submitted on the 8/1/2008 the version 2.0 of TouchPlot.
It corrected a few bugs, but mostly added some new features
with calculating and plotting solutions of ordinary
Of course, as with every other AppStore application,
version 2.0 came as a free upgrade to every version 1.0
subscriber (as did, and will, subsequent versions)
To give you a taste of the new features of 2.0, here is a
link to a first video :
and a little bit more involved example there.
Note that the videos have been made with TouchPlot
localized in french. Text of the menus, and some
mathematical functions names differ in the english
localization of TouchPlot, but of course features are the
2.1 corrected a couple of bugs, including one infamous bug
on the absolute function
2.2 adds a few changes to the user interface, and major
improvements to the formula editor.
2.3 was mostly a bug fix release.
2.4 added two new modes for function inspection. See
here a video
Next release was a major release : 3.0, and added handy
tools for the study of two variables functions. It allows
one to draw equations solutions, inequations, contourplots,
gradient field, as well as 3d graphing of surfaces with
See here for a
3.1 improved the ODE section, by allowing one to choose
tmin, t0 and tmax (previously t0 was supposed to be
tmin...) independantly (provided though tmin <= t0
<=tmax), and added a switch to lock aspect ratio
3.2 adds huge improvements to the formula editor, gets a
new design (new icons, new custom keyboards) and adds the
possibility to choose manual tickmarks.
3.3 corrects a nasty bug from 3.2 and adds many new
- embedded documentation in french and english
- possibility to save user-defined functions in libraries
- definite (numerical) integration
- cubic root function
- improved gestures for rescaling
- rounding of results near zero when it makes sense
- improved zero finding (a dichotomy is tried when Newton's
- possibility to define a minimum step for constants
4.0 added a new editor style, much easier for beginners.