Apple's best revenue growth in three years failed to impress, with shares down about 1% in volatile trading on Friday, as investors questioned whether a tariff-driven surge in iPhone sales would last.

On Apple's Q3 earnings call, CEO Tim Cook fielded questions on tariffs, smart glasses, AI investment, and its lucrative Google search deal.

Apple reported strong iPhone sales and rebound in revenue from China, giving a much-needed boost to two parts of the company’s business that had struggled over the past year. That better-than-expected performance reassured Wall Street investors that key parts of its business are holding steady as Apple struggles to keep pace with rivals in the artificial intelligence race and navigates President Donald Trump’s looming tariffs.