Roost's app is free. It'll cost you nada, zip, zilch. Tracking your security deposit, earning interest, and receiving your refund (via standard delivery) through Smart Deposit is also free. If you want to upgrade to “unlock” your security deposit, we charge a small and fair monthly membership fee. It’s waaaaaaay less expensive and much more upfront than anything like it. Plus, you can make payments over time and cancel your membership whenever.