Introduction
In this tutorial, you'll learn how to set up and use Google's new open-source Gemma 4 models for on-device AI processing. These models can handle text, images, and audio right on your phone without sending any data to the cloud. This is a great way to experiment with AI while keeping your privacy intact.
By the end of this tutorial, you'll have a working setup that demonstrates how to use Gemma 4 for agentic AI tasks like searching Wikipedia or using interactive maps directly from your phone.
Prerequisites
- A smartphone running iOS 17 or Android 13+
- Basic understanding of how to use apps on your phone
- Internet access to download the Google AI Edge Gallery app
- Optional: A basic understanding of how AI works (but not required)
Step-by-Step Instructions
1. Download the Google AI Edge Gallery App
The first step is to get the app that will let you access Gemma 4. This app is designed to showcase AI capabilities that run entirely on your device.
Why: The Google AI Edge Gallery app is the official interface where you can access the new Gemma 4 models. It's specifically built to demonstrate how AI can work without sending your data to the cloud.
Go to your app store (App Store for iOS or Google Play Store for Android) and search for 'Google AI Edge Gallery'. Download and install the app.
2. Open the App and Explore the Interface
Once installed, open the app. You'll see several sections including AI Chat, Agent Skills, Ask Image, and Audio Scribe.
Why: Understanding the app's interface helps you know where to find different AI features. The Agent Skills section is where you'll find the agentic capabilities of Gemma 4.
The main screen shows four key sections:
- AI Chat: For general conversation with the AI
- Agent Skills: Where you can use AI to perform tasks like searching the web
- Ask Image: For analyzing images
- Audio Scribe: For converting audio to text
3. Try the Agent Skills Feature
Tap on the 'Agent Skills' section. This is where Gemma 4's agentic capabilities shine. You'll see options to use the AI to search Wikipedia or access interactive maps.
Why: Agent Skills show how the AI can act independently to access tools and information. This is different from traditional chatbots because the AI can perform tasks without needing to connect to the internet.
Try asking something like:
"Search for information about the Eiffel Tower on Wikipedia"Or:
"Show me a map of Paris with tourist attractions marked"4. Test Text Processing with AI Chat
Return to the main screen and tap on 'AI Chat'. This section lets you have conversations with the AI using Gemma 4.
Why: This is a good way to see how the AI processes text and responds to questions. It's the core functionality of the model.
Try asking simple questions like:
"What is the capital of France?"
"Explain how photosynthesis works"
"Tell me a joke"
You'll notice that the responses are generated directly on your phone, not from a cloud server.
5. Experiment with Image Analysis
Go to the 'Ask Image' section. This feature allows you to upload a photo and ask the AI to analyze it.
Why: Image processing is a powerful feature of Gemma 4. It shows how AI can understand visual information without sending images to the cloud.
Take a photo of something interesting (like a plant, a building, or a pet) and upload it. Then ask questions like:
"What is this plant?"
"Can you describe what's in this photo?"
"What is the color of the sky in this image?"
6. Use Audio Scribe to Convert Speech to Text
Finally, try the 'Audio Scribe' feature. This allows you to record audio and have the AI convert it to text.
Why: Audio processing is another important capability of the model. It's useful for taking notes, transcribing interviews, or creating text from voice memos.
Record a short voice memo (like a few sentences about your day) and let the AI convert it to text. Notice how the processing happens entirely on your device.
7. Verify Data Privacy
One of the most important aspects of Gemma 4 is that no data ever leaves your device. You can verify this by:
- Noting that the app works even when offline
- Observing that there's no internet connection required for most operations
- Checking that no data is uploaded to Google's servers
Why: This privacy feature is crucial for protecting your personal information. Gemma 4's on-device processing ensures that your conversations, images, and audio remain private.
Summary
In this tutorial, you've learned how to set up and use Google's new Gemma 4 models for on-device AI processing. You've explored different features including:
- Agent Skills for web searches and map access
- AI Chat for general conversation
- Image analysis capabilities
- Audio transcription features
The key benefit of using Gemma 4 is that all processing happens directly on your phone, ensuring your data never leaves your device. This makes it a powerful tool for privacy-conscious users who still want to use advanced AI features.
This hands-on experience gives you a practical understanding of how agentic AI can work on your personal device without compromising your privacy.
