Thanks for reaching out! I'm happy to help. At this time, Lucidchart for iOS does not have an import stencils feature. However, if you import your stencils on a computer by selecting "Visio stencils" in the Shapes Library and add them to your document, you should be able to access them from your iPad. That being said, we're always looking for ways to improve Lucidchart, and your feedback is the best way for us to do that. Would you mind adding your idea to our feature request form? This form allows our team to categorize like requests and bring them to our product team. Thanks again for your request! Please let me know if you have any further questions.