Pi
Emotionally intelligent personal AI for talking things through
What is Pi?
Pi is a personal AI from Inflection AI, built for supportive conversation rather than producing work documents. People use it to talk through decisions and difficult topics, learn about a subject, practice a language or brainstorm, by text or in a live voice mode. It is free on the web and in iOS and Android apps, and neither app store listing shows a paid plan.
Pi is free to use. See every plan
Good for
- Talking through decisions, worries or difficult conversations
- People who would rather speak with an assistant than type
- Casual learning and language practice at no cost
Worth knowing
- The app listings describe conversation only, with no mention of file analysis, image generation or coding tools.
- The App Store listing shows English as the app's only language.
- The App Store gives the app an 18+ age rating.
- The listings cover iPhone, iPad and Android; no desktop app is listed, so on a computer Pi is used in a browser.
Key features
- Supportive conversation
- Designed for preparing a hard conversation, talking through a difficult topic or a decision, or venting when you want someone to listen.
- Voice mode
- Talk with Pi live by voice instead of typing your side of the conversation.
- Learning and language practice
- Explains a new topic in conversation and can act as a partner for practicing a language.
- Planning and brainstorming
- Helps turn something new into an action plan, generates ideas and suggests things such as what to watch next.
- Adapts over time
- Inflection says Pi evolves and understands you better the more you talk with it.
Pi pricing
- Starts at
- Free
- Free plan
- The app is listed as free on the US App Store and on Google Play, and neither listing shows in-app purchases.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Free | $0 | Text and voice conversations with Pi on the web, iPhone, iPad and Android. |
Read from apps.apple.com on Oct 5, 2026. Prices change, so confirm with Pi before you buy.
How people rate the Pi app
4.4
out of 5 for the iPhone and iPad app
- 5 stars77%
- 4 stars7%
- 3 stars4%
- 2 stars3%
- 1 star9%
2,477 ratings on the App Store in the United States, read Oct 5, 2026. It rates the app, not everything the product does. See the listing
Pi alternatives
- Pi vs ChatGPT
Free plan · from $8/mo
- Pi vs Claude
Free plan · from $17/mo
- Pi vs Gemini
Free plan · from $4.99/mo
- Pi vs Meta AI
Free plan · from $7.99/mo
- Pi vs Microsoft Copilot
Free plan · from $9.99/mo
Common questions
Is Pi free?
Yes. Pi is free to use. The app is listed as free on the US App Store and on Google Play, and neither listing shows in-app purchases.
How much does Pi cost?
Pi lists one plan. Free: $0. Prices were read from apps.apple.com on Oct 5, 2026.
What platforms does Pi work on?
Pi is available on Web, iOS and Android.
How is Pi rated?
Pi's iPhone and iPad app averages 4.4 out of 5 from 2,477 ratings on the App Store in the United States, as read on Oct 5, 2026. That is the store's rating of the app, not a score from us.
Does Pi have a Windows app?
No Windows app was listed when its pages were read on Oct 5, 2026. Pi is listed for Web, iOS and Android.
Does Pi have a macOS app?
No macOS app was listed when its pages were read on Oct 5, 2026. Pi is listed for Web, iOS and Android.
Is Pi open source?
Pi is not described as open source on its own site, as read on Oct 5, 2026.
Who makes Pi?
Pi is made by Inflection AI. It dates from 2023.
What are the alternatives to Pi?
The closest alternatives to Pi in our directory are ChatGPT, Claude, Gemini, Meta AI and Microsoft Copilot. Each one has a side-by-side comparison with Pi.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Oct 5, 2026. What people say is linked where it appears.