PrimeZone

eBay is a marketplace for purchasing goods with auctions, price comparison, and coupons. The app includes basic search and product browsing features, but has critical bugs with login, photo display, and payment compatibility in some regions.

Magnit store application for shopping at retail stores, ordering product delivery, and using the loyalty program, but with frequent issues with delivery, app performance, and customer service.

LightInTheBox is a marketplace offering cheap clothing, gadgets and electronics from China with delivery to 200+ countries, but suffers from delivery issues, technical instability and complaints about undelivered orders and missing refunds.

Marketplace with 3 million products (electronics, books, home appliances) enabling fast purchases through a mobile app with additional discounts; supports express checkout via product scanning.

Marketplace for electronics and household appliances with product search, ordering, delivery, installment payment and Trade-in program features, but with frequent filtering and search errors.

HENDERSON is an online store for men's clothing, footwear and accessories with a mobile app for online shopping. The app runs unstably with frequent loading errors and synchronization bugs; the interface was redesigned and became less user-friendly, but product quality and staff consultation remain high.

Online pharmacy app for searching and ordering medications, dietary supplements, and health products with reservation at nearby pharmacies and a rewards program, but suffers from technical bugs and long delivery delays.

Duolingo is an app for independent language learning through short gamified lessons with pronunciation, reading, listening, and writing exercises. In practice, it frequently has issues with audio, progress synchronization, and content loading.