If you're referring to the popular Swahili song by Sauti Sol (a famous Kenyan/African band), and you're asking about downloading or installing the audio, here's how to address your request legally and on iOS (as direct app installations for audio files are restricted on Apple devices):
Mdundo is a popular service across East Africa that offers direct MP3 downloads.
Download the Boomplay App from the Google Play Store or Apple App Store. Search for "Bora Kijijini" and use the Download button to save the song directly within the app for offline listening.
You can stream or download the official audio from several reputable platforms: