We do not take money out of anyone's account unless they order a products from our web store, in which case, you would have voluntarily added your credit card and it would have been clear that you are purchasing a product.
Any charges from us would show up as being from iHealth Labs, Inc. There are other companies that use the name "IHealth", but we are the only company that is called "iHealth Labs, Inc.".
Downloading our app form the App Store is free. If you had downloaded it thinking it was for general use, you can just delete it.
You have contacted the wrong company. Please contact your financial institution and immediately place a stop payment on the charges that you are receiving and ask them to assist you in finding the culprit who is making charges against your account.