Scam
Response from developer
Thanks for reaching out, and sorry for the confusion. Our subscription is $4.99 and is charged at exactly that amount. We have never charged $8 for it, and no such price exists in our setup. Apple receipts show a single combined total when more than one purchase is made in the same session. Our app also offers one-time purchases separately from the subscription, so if one was bought alongside it, both would appear on the same receipt. You can see the itemized breakdown and request a refund if anything looks wrong. If you email us with your purchase date, we're happy to help you sort it out.
Stopped working once I ended my subscription
Response from developer
Thanks for the detailed feedback, and sorry about this. We've already refunded all affected tokens, so your balance should be restored. If it isn't showing correctly, email us and we'll fix it right away.