If you’ve been searching high and low for a you aren't alone. DJs looking to unlock pro-level mixing on their iPhones or iPads often run into roadblocks with the standard App Store model.

Apple aggressively fights piracy. Even if you find a working "i djay pro ipa link," the enterprise certificate used to sign the app will likely be revoked within days or weeks. When revoked, the app immediately crashes upon opening. You lose your cue points, playlists, and saved settings.

Sideloading is not illegal—piracy is. If you actually own a license for Djay Pro (say, you bought the Mac version) and want to install a specific older version on your iPad, you can legally use an IPA.