How to Use AI on Android Phone: Gemini, Circle to Search and More

The easiest way to use AI on an Android phone is Google’s Gemini assistant: on most phones you just press and hold the power button (or say “Hey Google”) and then type, talk or point your camera at something. If you want more, Android also offers Circle to Search for looking up anything on your screen, Samsung’s Galaxy AI tools on recent Galaxy phones, and official apps like ChatGPT from the Play Store.

The rest of this guide covers how to set each one up, what it’s good for, and the settings worth checking. Menus differ between phone brands and Android versions, so treat the paths below as accurate as of October 2026 but subject to change.

Quick comparison: your main AI options on Android

Step 1: Set up Gemini, Android’s built-in AI assistant

Gemini is now Google’s main assistant on Android phones. Google began replacing Google Assistant with Gemini on phones from September 4, 2026, rolling it out in batches, according to SamMobile. Reports on that announcement say that once your device switches, you can’t go back to Assistant. Many phones will already have Gemini; if yours doesn’t, you can install it.

What you need

Per Android’s official Gemini page, you need:

• A Google account
• A phone running Android 10 or later with at least 2 GB of RAM
• An up-to-date Google app (Gemini will prompt you if it needs updating)

If the Gemini app doesn’t appear in the Play Store, Android Central notes it probably isn’t available in your country or language yet.

How to install and start Gemini

1. Open the Google Play Store and search for “Gemini”. Install the app published by Google.
2. Open Gemini and tap Get Started.
3. Read the introduction, tap More, then accept the terms.
4. Type a question, tap the microphone to speak, or tap the camera icon to take or attach a photo.

Ways to open Gemini quickly

• Power button: On most Android phones, pressing and holding the power button opens Gemini. TechRadar notes you can change this behavior under Settings > System > Gestures, though the exact path varies by brand.
• “Hey Google”: Turn on “Hey Google” and Voice Match in the Google app’s assistant settings for hands-free use, including from the lock screen.
• App icon: Tap Gemini on your home screen or in the app drawer.

On Samsung phones where Assistant is still the default, you can switch manually under Settings > Google > All services > Search, Assistant and Voice and tap Switch.

Things worth trying first

• Ask it to summarize a long article or email you’ve copied.
• Take a photo of a plant, a menu in another language, or an error message and ask what it is.
• Ask for a draft reply to a text, then edit it yourself before sending.
• Use it for phone tasks you used to give Assistant, such as setting timers or reminders. Some users have reported Gemini feels slower than Assistant for these basic tasks, so test the ones you rely on.

Step 2: Talk to your phone with Gemini Live

Gemini Live is the conversational mode: you talk, it answers out loud, and you can interrupt or change topics as in a normal conversation. Google made Live’s camera and screen sharing free for Android users with the Gemini app, as Tom’s Guide reported.

Share your camera

1. Open Gemini and tap the Live button to enter full-screen Live mode.
2. Tap the camera icon. A viewfinder appears.
3. Point the camera at what you want help with and ask your question out loud. You can flip between front and rear cameras.

This is useful for things like identifying a part you need to replace or getting a second opinion on how to fix something in front of you.

Share your screen

1. Open Gemini and tap Share screen with Live.
2. Confirm the prompt. The conversation keeps going while Gemini sees your screen.
3. To stop, pull down the notification shade and tap Stop sharing.

A notification-bar indicator shows whenever a Live session is running. Don’t share screens showing passwords, banking details or other private information.

Step 3: Use Circle to Search for anything on screen

Circle to Search lets you look up something on your screen without leaving the app you’re in. According to Google’s help page, it’s available on select Android phones.

1. Long-press the Home button (3-button navigation) or the navigation handle at the bottom of the screen (gesture navigation).
2. Circle, highlight, scribble on or tap the text, image or video you’re curious about.
3. Add words in the search bar to narrow it down if needed.
4. Results appear at the bottom; swipe up to see more.

If nothing happens, check your navigation settings. On some phones the Circle to Search toggle sits in the display or navigation mode menu and isn’t on by default. Device support has grown a lot since launch, so check Google’s current list for your model rather than older articles.

Step 4: Galaxy AI on Samsung phones

Recent Samsung Galaxy phones add their own AI tools on top of Gemini. These include Live Translate for calls, Interpreter, and AI features inside Samsung Keyboard, Samsung Notes, Voice Recorder, Samsung Internet and the photo editor.

1. Open Settings.
2. Look for Galaxy AI. On older One UI versions, go to Advanced features > Advanced intelligence instead.
3. Open each feature and turn it on or off individually. There’s no single master switch.

For privacy, Android Authority describes a Process data only on device setting that keeps your data off Samsung’s cloud. The trade-off: some features, especially generative photo editing, won’t work with it turned on. Menu names have changed between software versions, so yours may look slightly different.

Step 5: Add other AI apps from the Play Store

Gemini isn’t your only choice. OpenAI’s ChatGPT has had an official Android app since July 2023, per Tom’s Guide, and its current Play Store listing advertises a real-time voice mode you start from the soundwave icon. Other AI companies publish their own official apps too.

When installing any AI app:

• Search the Play Store and check the developer name before tapping Install.
• Be wary of lookalike apps. Fake “ChatGPT” apps have been used to charge for free features or push malware.
• Don’t install AI apps from random download sites. Stick to the Play Store.

Privacy and battery tips

• Review what you share. Anything you type, say or show an AI assistant may be processed in the cloud. Check each app’s activity or history settings and delete what you don’t want kept.
• Keep permissions tight. Only grant microphone, camera and screen access when you’re using those features.
• Watch background use. Always-listening hotwords and live sessions use some battery. Turn off what you don’t use.

The bottom line

For most people, starting with Gemini (power button or “Hey Google”) and Circle to Search covers everyday AI use on Android. Add Gemini Live when you want to talk through a problem with your camera or screen, Galaxy AI if you own a supported Samsung phone, and a second assistant like ChatGPT only if you find Gemini falls short for what you do. Features and menus are changing fast, especially with the Assistant-to-Gemini switchover still rolling out, so expect some labels to move.