You can find various versions of the launcher, including those compatible with older Android systems, on archival sites:
Because this is a proprietary system application developed by Samsung, it is not available on the Google Play Store. You must install it using an APK file downloaded from a third-party archive. touchwiz home 5.1 1 download
However, TouchWiz Home 5.1.1 also has some limitations: You can find various versions of the launcher,
The story of is a nostalgic trip back to 2015, a time when Samsung was desperately trying to shed its reputation for "bloated" and "cartoonish" software. The Quest for "Project Zero" touchwiz home 5.1 1 download