Is Apple about to introduce new iPads? According to one report, it's at least testing new models in California.

Mobile marketing firm Fiksu (via TechCrunch) noticed new models being tested in Cupertino, California, as well as in other nearby locations, which seems to confirm reports about Apple planning to update its iPad lineup this spring. Fiksu's raw data logs showed four different models, but keep in mind it saw the same number of devices being tested before the release of the last two iPad Pro models.

Fiksu gathered the data from its tracking and attribution SDK, which is used in thousands of mobile apps. Apple of course tests the latest iPads with many installed apps, which is how Fiksu was able to spot and track the new models being tested by Apple near its headquarters.

Apple is expected to update its 12.9-inch iPad Pro model, as well as introduce a new 10-inch or 10.5-inch model with thinner bezels and an affordable 9.7-inch option. KGI Securities analyst Ming-Chi Kuo, a reliable forecaster when it comes to Apple news, claimed Apple will launch the two larger models with an A10X chip, a version of the A10 chip used in the iPhone 7, while the low-cost model will use an A9 chip.

Check out Pocket-lint's round-up for more rumours about the upcoming iPad Pro 2. Apple will likely hold a "special event" in April, and at that event, which could take place at the new 1,000-seat Steve Jobs theatre, we should see the new iPad models debut.