If you are looking for the version 1.0 APK specifically, you can often find it on third-party app stores like Uptodown or Aptoide .
Identifies bulky videos, photos, or duplicate documents that are consuming significant space. How to Download and Install the APK Download Space Cleaner - Clean My Android 1.0 Apk
Go to your device's Settings > Security (or Privacy) and toggle on "Install from Unknown Sources" to allow the browser to install the file. If you are looking for the version 1