Because it was an iOS app, any legitimate legacy files are in format, not (which is for Android). Where to Find It (Legacy Files)

Open Google Play Store → Settings → Network preferences → Auto-update apps → “Don’t auto-update apps.” This prevents the Play Store from overwriting your 2021 version with a newer, incompatible one.

Use a mobile antivirus or a service like VirusTotal to check the APK before opening it.

Since Talking John the Bacteria is no longer available on the official Google Play Store, users must rely on APK (Android Package Kit) files. To install the app safely in 2021 and beyond, follow these steps: