10 Best AI Apps for iPhone in 2026 (Tested & Ranked)
Update — May 2, 2026: Read our new Grok 4.3 review. Your iPhone ships with Apple Intelligence built in, but the real power is in the third-party AI apps you add on top. Across 1 million+ ratings, Grok alone holds a 4.9-star App Store average, ChatGPT pulls in hundreds of millions of users every month, and Google Gemini crossed 450 million monthly users in 2026. The gap between the best AI app for iPhone and the rest is now huge, and picking the right one matters more than ever. We spent the last two weeks testing the top AI apps on iPhone in real workflows, writing emails, editing photos, researching […]
