Well if your Xperia Z1 and Z1 Compact has been updated to KitKat and you’re disappointed because the 4K video and Timeshift video feature is not available in your device, then some guys at XDA has ported these camera add-ons to Xperia Z1 and Z1 Compact phones.
However, the system requirements is that you must be rooted and deodexed. We must inform you that this patch won’t work with Xperia Z as of the time we’re writing this post, but they are still working to port these features to Xperia Z handsets.
We also must inform to you that if you turn on the SteadyShot feature in the 4K video, the app will freeze. This is a known bug and they are working on it too. If you’re interested and meet the system requirements we’ve listed above (rooted & deodexed), then head over to the source link below to try it.