Users searching for apk to tpk conversion are usually looking for a way how to install android app on tizen system, for example on smart TVs and similar devices. Tizen OS contains OpenMobile Application Compatibility Layer which means that some modern Android apps can be installed and used in Tizen devices without any problem. However, not every app supports OACL which makes users look for android to tizen app converter - which does no longer exist. There once was an online tool called Polaris App Generator from Infraware (polaris app converter), but this seems to be defunct now and no longer available.
Unfortunately, we do not know about any other reliable program that can directly convert apk to tpk or some similar tool that can directly tranaform Android packages to their Tizen counterparts.Open APK file Open TPK file