Zenni is a free iPhone application that provides its users with a wide selection of affordable prescription glasses and sunglasses. The app offers over thousands of styles starting at just $6.95, which includes basic prescription lenses. The application's AI-powered image search tool is an exclusive feature that helps users find glasses frames similar to their favorite style. Additionally, the app offers an enhanced 3D virtual try-on feature that lets users see how the glasses would look on them before they make a purchase.

The app also provides specialized lenses such as Transitions®, progressives, bifocals, and Blokz® blue-light-blocking. The application provides a personalized shopping experience, special offers, and promotions exclusive to the app. Users can save their favorite glasses with one click and choose from more than 20 tint options, including mirrors and polarized lenses, for chic prescription sunglasses starting at $12. Moreover, the app provides star-studded collaborations and all the accessories needed, including chains, deluxe cases, and cleaning kits.

Zenni Rewards is another exciting feature of the app, where users can enroll and start earning exclusive rewards while tracking their status. The app also provides hassle-free 30-day returns, store prescriptions for the whole family, and manage orders and payment methods. Users can also access chat or Help Center instantly if they need help.