In traditional Jain maryādā, apple cider vinegar is not allowed.

Reason:

• Vinegar (including apple cider vinegar) is a fermented product.
• In fermentation, countless tiny living organisms (anantkāy jiv) are involved and get destroyed.
• Because of this, all kinds of vinegar are generally kept in the “always avoid / abhakṣya” group in Jain food practice.

This understanding is the same in both Śvetāmbara and Digambara traditions, though individual families may follow with different strictness. If your guru, sadhu/sadhviji, or local Jain sangh has given specific guidance, you should follow that.

So, from a Jain dharma point of view focused on ahiṃsā: > Apple cider vinegar = avoid.

You can read more about allowed and not‑allowed foods for Jains here