I recently bought a K-70 and downloaded the latest Image Sync app for android ver 2.0.1
The app worked fine and I was able to use my phone or my tablet for image transfers.
Few days later it stopped working and it crashed every time I selected an image for transfer. This happened on both phone and tablet. Resetting Wi-Fi in camera did nothing, resetting the camera to default settings did nothing. Reinstalling the app did nothing! Finally I remembered that through the "MENU" on the K-70, I changed the "file name" from the default "IMGP" to "K70", in order to immediately recognize the files in a file manager, since I have more than 100.000 "IMGP" files from a K-x and a K-50. Image Sync app does not recognize/like this change and it crashed every time. Resetting the camera does NOT reset the file name to default IMGP, so I had to do it myself. Image Sync works like before. I hope someone in Pentax fixes this.