IstopCamera flipping image

I use istopmotion on my mac to film lego stop motion. I decided to download and use the istopcamera app on my phone as a camera. I want to be able to take pictures with the phone camera positioned on the bottom of my phone vs at the top edge of my phone but the image flips when it gets uploaded to istopmotion. Is there a way to rotate the images or prevent the photos from being rotated? With the camera at the top of my phone, it is too high to shoot my lego guys. I use an iphone 7 plus. Thanks