Thanks for contacting us. I'm glad to hear you are a long time user and happy with the improvements we've made.
Unfortunately, our iOS version through the Apple Store costs $10 US. Once you buy it, you will be entitled to subsequent upgrades. We have many new and/or improved features coming out this year.
FYI - We have been debating moving to a pricing new model (offering a basic free app with an in-app paid upgrade for advanced features) but we have not decided if that's the way we want to go. If we do decide to make a change, I can't predict when that will happen.
Hope this information helps with your decision(s).