Nobody preinstalled an agenda on your iPhone. That is the advantage. The App Store carries all the major chatbot apps, none of them forced on you, so four free downloads and one honest afternoon gives you a real answer. ChatGPT, Claude, Gemini, Perplexity. Go.
Test the iOS-specific plumbing, because the models matter less than the fit. Shortcuts integration. The share sheet: can you send a webpage or photo straight into the app? Voice input quality on a walk. The app that slots into your iPhone habits wins, even if its benchmarks are a hair lower. An AI tool comparison quiz app on iOS and Android can narrow the field, but the share-sheet test is the one that predicts daily use.
Rough guide: Claude's app shines at writing tasks, which suits a lot of iPhone-heavy workflows. The ChatGPT app is the best all-rounder with the deepest feature set. Gemini is worth it if you are a Google Workspace person despite the Apple logo on your phone. Perplexity is the research specialist. Rank them by your three most common tasks and the answer writes itself. That is the pick my AI stack app free method applied to your phone.
My rule: keep two. One primary, one specialist. Five AI apps means you open none of them with confidence. Pick the winner, keep a specialist like Perplexity for its niche, delete the rest. A tidy home screen is a decision made.
I run 210 head-to-head AI tool comparisons with clear verdicts at aitoolguide.fyi, including iOS picks. Selling an AI tool? Sponsored placements and affiliate spots reach buyers choosing now.