MathStudio Express ne fonctionne plus

MathStudio Express, a full-featured scientific calculator with hundreds of mathematical functions that cover Basic Math, Pre-Algebra, Algebra, Trigonometry, Precalculus, Calculus, Statistics, Finite Math, Linear Algebra and Statistics.  "MathStudio is a natural for students and for engineers who occasionally need a comprehensive math program but don't need the full horsepower and daunting complexity of Mathematica or Maple.  MathStudio is the first calculator to introduce time graphing when it was first released as SpaceTime in 2003 for Pocket PC.  Move, rotate and pinch function, parametric, polar, implicit, contour, spherical, cylindrical, vector fields, fractals and image plots with amazing speed and accuracy.  "I've been waiting for a program like this a long time on my iPhone or iPad, and somehow never found MathStudio until now.  Create scripts in MathStudio's powerful programming language that supports variables, loops, and recursion.  MathStudio is powered by that fastest proprietary computer algebra system available on iOS that beautifully typesets your answers.  MathStudio even includes an advanced regression analysis package, choose from several regression functions or create your own.  I highly recommend this application to every college student and math enthusiast!  I continue to be stunned by the speed and accuracy in which it solves/plots/does just about anything you could possibly need to do in math.  MathStudio solves and displays complex expressions in a fashion that reminds me of my TI 92's 'pretty print' mode.  MathStudio is an indispensable tool for students, teachers, and engineers.  I prefer it to computer math applications because you simply cannot beat the touch interface.  "This is truly an amazing piece of software for the iPhone that could potentially render all the graphing calculators out-there obsolete!  I was very impressed with all the graphing features (2D, 3D, 4D, etc) and the powerful CAS loaded with preprogrammed functions.  Use the T variable to create animated plots that graph in space and time!