This appears if you try to restore from an iCloud backup. Fix: Install the IPA manually via sideloading, then sign into iCloud. Do not restore a backup that contained a newer djay Pro.
Released during the golden age of mobile music creation (circa 2013-2015), djay 2 was Algoriddim’s flagship DJ application. Unlike the simplified, effects-heavy apps of its time, djay 2 brought professional-grade features to the iPhone’s touchscreen. djay 2 for iPhone IPA v2.8.1
Version 2.8.1 represents one of the final builds before the company pivoted to a freemium model with djay Pro. It is widely considered the most stable, feature-complete version of the “classic” djay 2 series. This appears if you try to restore from an iCloud backup
This is a grey area.
This guide assumes you have a legitimate license for djay 2 or are using the IPA for archival/educational purposes on a device disconnected from your Apple ID. This guide assumes you have a legitimate license