Ensure you have the APK + OBB folder. Do not run the APK yet.
Using a file manager (like Solid Explorer or CX File Explorer), navigate to Android/obb/ . Create a folder named com.neowiz.tapsonic.worldchampion (or the relevant package name). Move the .obb file into that folder.
Run the APK installer. If the installation completes without error, the build is likely verified.
This process involves sideloading. Always back up your device first.
We anticipate the development of —similar to what exists for Osu! —that will allow you to load any Tapsonic chart file without any network handshake. Until then, the verified APKs and patches floating around today are your best bet. Conclusion: Your Next Steps If you are tired of buffering wheels destroying your Full Combos, or if you want to play Tapsonic on a cross-continental flight, seeking a Tapsonic Offline Verified build is a logical, safe, and rewarding endeavor.