Yes, both Retinello and Mastery offer a Free Trial.
The starting price of Retinello begins at $6.57/month, while pricing details for Mastery are unavailable.
Retinello offers several advantages, including Interactive learning sessions, Identify unique knowledge gaps, Custom questions for comprehension, Spaced repetition learning, Adapts to user's progress and many more functionalities.
The cons of Retinello may include a No mobile application mentioned, No offline mode indicated, No multi-language support stated, Lack of collaborative learning features. and No user community support
