Ballast is a subscription: $1.99 a month or $19.99 a year. Outside the US, the App Store shows the price in your currency. One subscription covers every iPhone, iPad and Mac signed in to your Apple Account.
Choose a plan to start a free month. When it ends, the subscription renews at that plan’s price unless you cancel at least 24 hours before. Cancel before then and you’re never charged.
Your boat stays. You can still look through everything and export it, but you can’t add, change or delete anything until you subscribe again.
From there, Manage Subscription changes your plan or cancels it. On a new device, or after reinstalling, Restore Purchases finds a subscription you already have.
Still stuck? Hail us.