Answer

Ādi Purāṇa is mainly a Digambar Jain text.

Explanation

Ādi Purāṇa is an important Jain Purāṇa that describes the life of Lord Rishabhdev / Ādināth Bhagwan, the first Tirthankar, along with the story of Bharat Chakravarti and Bahubali.

In Jain tradition, the most well-known Ādi Purāṇa is composed by Āchārya Jinasena and completed by Āchārya Guṇabhadra, both associated with the Digambar tradition.

Takeaway

So, if you are referring to the famous Jain text Ādi Purāṇa by Āchārya Jinasena, it belongs to the Digambar Jain tradition.