: To set a sound for just one app (like TikTok or WhatsApp), go to Settings > Notifications > App notifications , select the app, and tap Notification categories to change the sound for specific alerts. Setting Custom MP3 Notifications on iPhone
: Use a file manager app to copy or move your downloaded MP3 into the internal storage folder named "Notifications" . Download notification 125767 mp3
: Open Settings > Sounds and vibration > Notification sound . : To set a sound for just one
How to set ANY Sound as iPhone Notification - Free and No Computer! How to set ANY Sound as iPhone Notification
: Look for a "Custom" or "Add" section at the top of the list to find your specific MP3 file.
iPhone requires a few extra steps because it uses the .m4r format for tones:
Once you have your MP3 file, setting it as your default or app-specific alert varies by device: Setting Custom MP3 Notifications on Android