Do you have data-collection software available for iPad, iPhone, or iPod touch?

Yes, the Connected Science System, introduced with LabQuest 2, supports data collection with the latest mobile technology, and is compatible with most of our existing sensors.
http://www.vernier.com/css

Vernier Data Share is included with LabQuest 2 and supports iPhone, iPad and iPod touch, along with any device with a compatible web browser—Android, Chromebooks, and more. Every student in a lab group can control data collection and perform individual data analysis. For more info, see:
http://www.vernier.com/data-share

Graphical Analysis for iPad includes all the functionality of Vernier Data Share, plus Multi-Touch, advanced export features, and the automatic saving of projects. For more info, see:
http://www.vernier.com/ga-ipad