Google Assistant is Google's voice assistant. It's free, understands Brazilian Portuguese, and comes pre-installed on most Android devices—in many cases, you don't need to download anything, just activate it. It's used to perform short tasks by speaking: setting an alarm, creating a reminder, asking for directions, calling someone, or controlling a compatible device at home. Below is what it actually does, what depends on the internet, and what changes now that Google is offering Gemini in its place.
Google Assistant
AndroidWhat the app does
Voice commands in Portuguese
Alarm, stopwatch, reminder, call, message, weather forecast, opening an app, and searching the internet all work by speaking. In everyday use, the recognition is quite accurate, but it still makes mistakes in noisy places, with proper names, and with slang—in these cases, it can be corrected by typing on the screen.
Connecting with Google apps
It interacts with Google Calendar, Maps, Gmail, and YouTube to create appointments, get directions, or play videos. This only works when you're logged into your Google account and have granted the necessary permissions; otherwise, it responds that it doesn't have access.
Control of compatible devices
Lamps, outlets, cameras, and televisions respond to voice commands as long as they are compatible models, purchased separately, and already configured in the Google Home app. The Assistant alone cannot turn on a regular light bulb.
Routines with a single command
You can create a sequence and trigger everything at once. By saying "good morning," for example, it can read the weather forecast, list the day's appointments, and start a playlist.
Accessibility assistance
For those who have difficulty seeing the screen or handling the device, voice becomes an additional way to open apps, read messages, and make calls.
How much does it cost
On the Google Play listing, the app appears as free, without the "Contains ads" warning and without "In-app purchases." What may cost money is the rest: smart home devices, subscriptions to third-party services it controls (music and streaming, for example), and mobile data used in each query.
What he doesn't solve
Most requests are processed on Google's servers, so without internet it responds very little — what continues to work offline varies depending on the Android model and version. Not every command exists in Portuguese or is available in Brazil; some integrations only work in English. And what appears when holding down the home button changes from manufacturer to manufacturer, because some brands put their own assistant on the front. Finally, it makes mistakes: check the time, address, and price on the screen before trusting anything important.
Gemini in place of the Assistant
The app description on Google Play states that Gemini can be activated as the phone's primary assistant. When switching, some Assistant actions may not work immediately, and it's possible to revert to Google Assistant through the app's settings. The rollout is happening on selected devices and in selected countries, meaning not everyone will see the option at the same time.
How to activate it on your Android
Start by holding down the home button or swiping from the bottom corner of the screen — if the assistant is already active, it will open there. If nothing appears, search for the app on Google Play using the button on this page. To have it respond to "Hey Google" without you touching the device, you need to turn on voice detection in your phone's Google settings; the path varies depending on the brand and Android version, and is usually found in Settings, Google, Google app settings, Search, Assistant, and Voice. After that, speak short, direct phrases: long requests with many conditions are the ones it most often misunderstands.
Privacy: what is recorded
Voice requests are saved in your Google Activity (Web & Apps). You can go to myactivity.google.com, view what was recorded, delete item by item, and turn on automatic deletion after a period of time. You can also turn off wake word detection, so it only responds when you open it.
Google Assistant
AndroidCommon questions
Not through the app: on the Google Play listing it appears as free, with no indication of in-app purchases. Smart home devices and subscriptions to other services are paid for separately.
Most commands require a connection. Some requests resolved on the device itself may work offline depending on the model, but don't count on it.
The app's own description on Google Play states that Gemini activation is being rolled out to select devices and countries, and that it's possible to switch back to Google Assistant in the settings. The app remains available on Google Play.
Yes, and in common use it works well. However, background noise, proper names, and slang still hinder recognition, and not every command available in English exists in Portuguese.
It waits for the activation word to start sending audio. This detection can be turned off in the settings, and the command history can be reviewed and deleted at myactivity.google.com.
How to choose between the options
- Permissions requested. An app should only request what it needs to function. Requests for access to contacts, messages, or accessibility without reason are a red flag.
- Billing model. Check if it's free with ads, pay-per-view, or subscription-based — and the price range for in-app purchases.
- Last updated and supported. An application without a recent update tends to break with the next system version.
- It works offline. If the task is local, requiring a connection means that your data is being sent to a server.
What these apps don't do
This is the part that almost no list mentions, and it's precisely what separates expectation from result.
- They can't do what the device's hardware doesn't allow. A feature without a corresponding sensor doesn't exist in software.
- The free version often limits exports, applies a watermark, or restricts the number of uses per day.
- A high rating in the store doesn't guarantee quality: it's worth reading recent, negative reviews.
- An app that promises impossible results usually exists only to display advertising.
How to use it in practice
- Review your consumption after one week. In the settings, view battery and data usage by app and restrict any that are high.
- Check if it works offline. If the task is local but still requires a connection, your data is being sent to a server.
- Adjust the notifications on the first day. Leaving everything plugged in is the most common reason for uninstallation in the first week.
- Try the free version before you pay. Check if the feature you want is outside the free plan—it usually is.
What goes wrong most often?
- Installing multiple applications that do the same thing, all running in the background.
- Choosing based on average rating without reading recent negative reviews.
- Granting access to contacts, messages, or accessibility without a clear reason.
- Believing in a feature that the device's hardware does not support.
What the cell phone itself already does.
It's worth opening the search in your phone's settings before installing: Android and iPhone already have several built-in functions, and the native app usually consumes less battery and doesn't ask for any permissions beyond what's necessary.
