iPhone 4s comparability issue

I have been using this app for 6 months to a year with nothing but positive things to say. It is fast and accurate. However, due to the most recent update I cannot open the app on my iPhone 4s. This is not a huge deal as I will be updating my phone in the next few weeks but I was hoping to back up everything for my own records. I would appreciate a fix to this so I do not have to start everything over when I change phones.

Chris Ragghianti about Mileage Log+ Trip Log Tracker