SAN FRANCISCO (AP) — The makers of Blekko believe they’ve built a great alternative to Google, but they’re also realistic. They know their two-year-old Internet search engine won’t ever supplant Google as the most popular place to search on laptop and desktop computers.

But Web surfing on tablet computers is a different matter, creating an opportunity that Blekko hopes to exploit with a new product called Izik — a search engine designed especially for Apple Inc.’s iPads and tablets running on Google’s Android software.