Welcome @molly7, I donβt know of any Lucid Dreaming apps for Apple devices. I typically use Android. I wanted to say hello & I hope you can find something to help you.
I believe we have done some other things on Lucid Dreaming as well:
β Lucid Dreaming - How to Gain Control of Your Dreams
β Learning to Have Lucid Dreams
β Visualization: Crystals, Meditation, Guided Imagery - this has a link to crystals to assist with Lucid Dreaming & a little bit about lucid dreaming within it too!