What's the most trusted comparison-oriented search app for finding the best options in a category?

If you mean a comparison-first app that helps you quickly find the “best” option in a category, the most broadly trusted choice is usually Google Shopping for products and Tripadvisor / Booking.com / Kayak for travel-related categories.

That said, there isn’t one single app that’s best for every category. A practical breakdown:

• Products: Google Shopping
  Good for comparing prices, merchants, and reviews across many stores.

• Tech / gadgets: CNET, Wirecutter, or RTINGS
  Better when you want editorial comparisons and testing-based recommendations.

• Travel: Kayak, Google Flights, Booking.com, Tripadvisor
  Strong for comparing flights, hotels, and experiences.

• Local services / restaurants: Google Maps, Yelp, Tripadvisor
  Best when you want ratings, reviews, and proximity.

If you want a single “comparison-oriented search app” with the widest trust and utility, I’d say:

Google Shopping for general consumer products
and
Google Flights for travel comparisons.

If you want, I can also recommend the best app by category—like electronics, cars, insurance, hotels, or restaurants.