Google Gemini Cheat Sheet: A Complete Guide

Google Gemini is Google’s suite of generative AI features that power conversations, writing, research, and creative tools across Google’s apps and devices.

Introduced as a model family in late 2023 and rolled out to consumers in 2024, Gemini has steadily expanded from a standalone chatbot into Android, Google Workspace, Chrome, Search, and smart‑home experiences.

What does Google Gemini do?

Google Gemini is an umbrella term for a wide range of generative AI capabilities available across Google’s ecosystem. It includes:

• Conversational help for general questions, coding, math, and planning
• Writing tools for drafting, rewriting, summarizing, translating, and changing tone
• Multimodal analysis of images, PDFs, screenshots, and documents
• Long‑context research and multi‑file analysis in Gemini Advanced
• Custom assistants, called Gems, built for recurring tasks
• AI image generation and newer video creation features where available
• Live, voice‑based help with visual guidance using a phone’s camera

These features appear in the Gemini app and in products like Docs, Gmail, Slides, Sheets, and the Android system.

How does Google Gemini work?

Gemini runs on a family of AI models designed for different levels of speed, power, and efficiency.

Some Gemini features run in the cloud on Google’s servers, while others operate directly on supported devices. This mix allows Gemini to handle complex tasks while also supporting faster, more privacy‑sensitive actions on‑device.

Google currently offers several main model tiers:

• Gemini 3.1 Flash Lite: An ultra-fast, lower-cost version of the Flash model designed for lightweight tasks such as quick responses, high-volume interactions, and background AI features where speed and efficiency matter more than deep reasoning.
• Gemini 3 Pro and Flash: The latest general‑purpose models used for most Gemini apps and integrations, balancing capability with speed and cost.
• Earlier Ultra‑class models: Previously represented the most powerful Gemini configuration and still underpin some “advanced” and long‑context capabilities in Gemini Advanced.
• Gemini Nano: A lightweight on‑device model used for tasks like smart replies, summaries, and other quick actions on supported Android phones.

For privacy, Gemini experiences include data‑control settings that let users manage how prompts and outputs are handled. On‑device features process data locally, while cloud‑based features use standard Google account controls, and Workspace and enterprise deployments follow stricter data‑handling and isolation rules.

Where is Google Gemini available?

Gemini is available across a growing number of platforms:

• Web: The main Gemini web app is available at gemini.google.com and supports 70+ languages in over 230 countries and territories.
• Android (Gemini app): On Pixel 9 and later, Gemini comes preinstalled and works as the default assistant, accessible via the power button, gestures, or “Hey Google.” On other Android phones, including older Pixels, Gemini is available for free from the Play Store and can be set as the default assistant on supported devices.
• iOS: A dedicated Gemini app is available from the App Store; it runs alongside Siri and does not replace it.​
• Google apps (Workspace): Gemini‑powered features are integrated into Docs, Gmail, Sheets, Slides, and Meet through Gemini for Workspace or related add‑ons, subject to admin and regional availability.​
• Chrome and Search: Gemini models back AI‑powered summaries and tools in Chrome and Google Search (for example, AI Overviews), with Gemini in Chrome rolling out in the Chrome side panel on Windows, macOS, and ChromeOS (including Chromebook Plus devices); rollouts are region‑ and language‑specific.​
• Smart devices: Gemini is gradually replacing Google Assistant on Android Auto, Wear OS watches, Google TV, and compatible smart‑home speakers and displays through the new Gemini‑powered home assistant experience, starting in the US and expanding over time.

Availability varies by country, language, and device, and not all features are enabled everywhere.

Will Google Gemini come to older devices?

Gemini is broadly accessible through the web and mobile apps, but some advanced or on‑device features require newer hardware.

On Android, features that rely on on‑device processing are available only on newer phones that support Gemini Nano. Older devices may still access Gemini through cloud‑based apps, but won’t support all system‑level capabilities.

How much does Google Gemini cost?

Gemini is available in both free and paid tiers:

• Free Gemini provides access through web and mobile apps with standard limits and smaller context windows.
• Gemini Advanced is a paid subscription that unlocks more powerful models, long‑context research, custom Gems, early access to new features, and bundled Google storage.

For businesses and developers, Gemini is also available through Workspace add‑ons and Google Cloud tools.

When did Google Gemini launch?

Gemini replaced Bard in 2024 and has expanded steadily since then. New features, model upgrades, and device integrations continue to roll out in stages.

How do I add Google Gemini?

To start using Gemini:

• Visit gemini.google.com and sign in with a Google account
• Install the Gemini app on Android from Google Play or iOS from the App Store
• On supported Android devices, set Gemini as the default assistant in system settings

How do I activate Google Gemini?

Gemini does not require a separate activation on most platforms. Once you’re signed in, features are available automatically based on your device, region, and subscription level. Gemini Advanced can be enabled by upgrading within the app.

What are the competitors to Google Gemini?

Apple Intelligence is available on supported iPhones, iPads, and Macs. Samsung Galaxy AI runs on recent Galaxy devices. Microsoft Copilot is integrated into Windows, Edge, and Microsoft 365.

Editor’s note: This article originally appeared on our sister website, TechRepublic.

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