If you remember the Z1 correctly, then you maybe knowing that Timeshift Burst was one of it’s main selling points. the mode allows you to capture 61 frames within two seconds, with initial frames being capture even before pressing the shutter.
Just lik Motorola released it’s camera app in the Play store post the negative reviews of the Cameras processing and quality, Sony has done something similar. Sony Xperia Z and the Z Ultra users were able to successfully install this app. if you have a compatible device you can give it a shot.