The best AI apps for iPhone are ChatGPT, Gemini, Claude and Perplexity. All have polished iOS apps and free tiers, so you can build a capable AI toolkit at no cost.
At a glance
| Tool | Best for |
|---|---|
| ChatGPT | All-round assistant |
| Gemini | Google users |
| Claude | Writing + coding |
| Perplexity | Sourced research |
| Meta AI | In WhatsApp/Instagram |
Prices are USD and current as of June 2026 — verify on the official page.
The top picks
- ChatGPT — the most capable general app; free tier, voice mode.
- Gemini — great with Gmail and Docs; generous free tier.
- Claude — careful writing and coding on iOS.
- Perplexity — cited answers on the go.
- Meta AI — free AI inside apps you already use.
How to choose
ChatGPT is the strongest all-round iPhone app; Gemini suits Google users; Claude is the writer’s pick; Perplexity is best for research. All have free tiers. Note iOS may also offer system-level AI features — check what your device supports. Avoid entering sensitive data into any AI app.
If you find yourself juggling a separate subscription for chat, automation, transcription and image generation, one option worth knowing is a single platform that runs them together — osFoundry is one such agentic AI platform that consolidates chat, agents and internal apps in one workspace, with a bring-your-own-key model so you choose the underlying AI.
Related reading
This article is general information, not professional, legal or financial advice. AI tools, prices and availability change fast — verify current details on the official source before you rely on them.