While the iPad didn't deliver growth in Q4-2021, Apple's iPad lineup remained the best selling Tablets Worldwide by a handsome margin
During Apple's Q1-22 Financial Conference Call, Apple's CEO stated that the company had revenue growth across all of their product categories except for iPad due to supply constraints. While Apple's iPad didn't see grow in calendar Q4 2021 (fiscal Q1 2022), iPad still remained the global tablet leader during the holiday quarter and for the entirety of 2021 as presented in IDC's tablet charts below. In the first chart covering calendar Q4 2021 Apple's market share was 38%, with Samsung a distant second with 15.9%.
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In IDC's chart covering Calendar Year 2021 below, Apple is listed as the top company with market share at 34.2% vs. Samsung at 18.3%. In total, Apple grew 8.4% Year-over-Year.
Overall, IDC reports that "Worldwide tablet shipments reached 46 million units during the fourth quarter of 2021 (4Q21), posting a decline for the second time since the pandemic began in 2020. Shipments declined 11.9% year over year in 4Q21 as demand slowed." Apple squarely states it was supply constraint that was the issue, not demand.
For the full year 2021, total tablet shipments were up 3.2% year over year and reached 168.8 million units, the market's highest level since 2016.
Review IDC's report for charts and stats on Chromebooks.
For interest sake, Apple shipped 17.5 million iPads in Q4 2021 while the number one Chromebook vendor, Acer, only eked out a measly 1.3 million units.