Yes, many Jains do use yantras, but their role is supportive and devotional, not the core of Jain liberation.

In Jainism:

• Yantras are sacred diagrams used in worship, meditation, and ritual practice.
• They are often connected with mantras, stotras, and devotional rites.
• Common Jain yantras include forms related to Siddhachakra, Navapada, and other auspicious sacred diagrams.

Important Jain understanding:

• A yantra is not an object of independent power by itself.
• Its value comes from the devotion, purity, and spiritual focus with which it is used.
• The main path in Jainism remains:

Tradition-wise:

• Use of yantras is more common in ritual and devotional Jain practice.
• Some Jain sects and lineages emphasize them more than others.
• They are generally seen as aids in spiritual remembrance, not as a substitute for karma-cleansing conduct.

So, in short: yes, Jains can believe in and use yantras, but as sacred aids within Jain worship, not as the central means of moksha.