Your FSA Visa card is not going to work at the Apple Store. I know, I tried it. Here’s the reason. It’s only accepted at merchants that have IIAS. This is a point of sale database of FSA eligible products. Like all government rules there is an exception, a business that makes 90% of its sales with FSA eligible items does not have to have IIAS. This does not mean that you can’t buy the Apple Watch using FSA dollars. It just means you may have to pay and file for reimbursement. Alivecor does take FSA Visas for their ECG devices. When I purchased a Withings Blood Pressure Monitor at the Apple Store, I had to do this.