How to Turn Any TV into a Smart TV with Cheap Devices
If you are looking for an affordable way to turn any TV into a Smart TV, know that the answer may be within your reach — and within your budget too.
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Instead of investing thousands in a new model, more and more people are opting for simple devices that make any television smart, connected, and functional for everyday use.
With an available HDMI input and a good Wi-Fi connection, you can access your favorite streaming services, install apps, play casual games, and even mirror your phone's screen with ease.
And the best part: spending less than R$ 400.
In this guide, you will learn:
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- What is needed to make this transformation;
- What are the best devices currently;
- How to choose the ideal one for your usage profile;
- Real-world comparison of models based on updated data;
- Practical tips to avoid common mistakes and get the most out of your experience.
Technology doesn't have to be expensive — it just needs to be used well.
In times of persistent inflation and constant updates in the electronics industry, renewing what already works has become a smart alternative.
And if your TV still has good picture quality, why change it?
Think of it this way: if you can install a modern engine in a classic car, why buy another one?
That's basically the logic behind turn any TV into a Smart TV with devices like Chromecast, Fire TV Stick or a good Android TV Box.
And this movement is not small. A report from PwC Brazil revealed that between 2022 and 2024, the number of users adopting streaming devices grew 38%, primarily in middle-income urban areas. The cost-effectiveness, combined with convenience, has become the norm.
What you need to get started
First, take a look at the back of your TV. Is there an HDMI input available? Great. This port will be essential for connecting any of the devices available on the market.
If you don't have one, you can still use HDMI to RCA adapters — but it's worth remembering that this can affect image quality.
Additionally, it's important to have a stable Wi-Fi network. An inconsistent signal can lag or freeze videos, making browsing difficult.
If necessary, investing in a signal repeater can greatly improve the experience.
Another important point is the power source. Some devices, like Chromecast and Fire TV Stick, are powered directly via the TV's USB port, but not all devices offer sufficient power.
In these cases, it is recommended to use the plug adapter that comes with the product.
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Devices that make magic happen
The three most popular devices in 2025 for turn any TV into a smart TV continue to be:
- Chromecast with Google TV
- Amazon Fire TV Stick
- TV Box with Android system
Each has its own advantages and specific profiles. The important thing is to understand how you consume content to make the best choice.
If you already use the Google ecosystem (YouTube, Google Photos, Google Play Movies), Chromecast tends to be more integrated.
On the other hand, the Fire TV Stick is excellent for those who already have Alexa devices or frequently use Amazon Prime Video.
TV Boxes, such as those from Xiaomi or Intelbras, are more complete in terms of customization.
Ideal for those who like to experiment, install apps outside of the official store, or use games and browsers directly on their TV.
Real-world comparison of major devices (2025)
To make your decision easier, see a clear and up-to-date comparison between the most sought-after models on the market:
| Device | Average Price (BR) | Supported Resolution | Voice Command | Storage | System |
|---|---|---|---|---|---|
| Chromecast Google TV | R$ 329 | Up to 4K | Yes (Google) | 8 GB | Google TV |
| Fire TV Stick 4K | R$ 299 | Up to 4K | Yes (Alexa) | 8 GB | Fire OS (Amazon) |
| Android TV Box | R$ 250 to R$ 400 | HD to 4K | Varies by model | 8-32 GB | Android |
Real sources: Google Store Brazil and Amazon Brazil
Practical tips to avoid making a mistake when choosing
When choosing your device, ask yourself: “What apps do I use most on my phone or tablet?”
The answer may guide you. If you're a fan of YouTube and Google Photos content, Chromecast will provide a smoother experience.
If your focus is Netflix, Disney+, Amazon Prime, or even Globoplay, the Fire TV Stick responds efficiently.
A practical example: a freelancer who spends the day working and at night watching documentaries and series might choose the Fire TV Stick for its speed and compatibility with streaming apps.
A couple who enjoys watching videos from their cell phone directly on the TV with ease will find Chromecast to be the best solution.
Another important factor is the interface. While Chromecast and Fire TV Stick offer simpler navigation, TV boxes can be more comprehensive but require more technical knowledge.
Integration with voice assistants and smart homes
More modern devices already come with native integration with assistants like Alexa and Google Assistant.
This means you can ask, by voice, to open an app, pause a video, or search for specific content.
Those who already have other connected devices at home—such as smart lights, thermostats, and cameras—can sync everything with their TV, creating an accessible and modern smart ecosystem.
And this type of integration is increasingly present in Brazilian homes. According to IDC Brazil, there was a 24% increase in sales of voice-controlled devices in the first half of 2024 alone.
What is the impact on energy consumption?
A little-discussed — but important — point is the impact of these devices on energy consumption.
The good news is that they're extremely economical. Most consume between 2 and 5 watts per hour, which translates to about R$ 2 to R$ 5 per month in an average home, assuming a 4-hour daily usage rate.
I.e, turn any TV into a smart TV does not mean drastically increasing your electricity bill.
On the contrary: you can still set automatic shutdown and power saving on the devices themselves.
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Security and privacy: stay alert
When connecting your TV to the internet, it's essential to protect your data. Therefore, avoid installing apps from unknown sources (especially on TV boxes) and always keep your systems updated.
Activate strong passwords to access accounts and, if possible, use two-factor authentication.
Also, avoid leaving the device permanently on if you won't be using it for long periods. This protects your network from unauthorized access and extends the device's lifespan.
Is it worth investing in 4K models?
Yes, especially if your TV supports this resolution. Even if you still stream content in Full HD, more and more services are increasingly prioritizing 4K streaming. This ensures longer device life.
But be careful: there's no point investing in a 4K device if your internet isn't compatible. Ideally, you'll want at least 25 Mbps of speed for stable streaming at this quality.
Conclusion: The smart decision is in your hands
Turn any TV into a smart TV It's a strategic, cost-effective choice that aligns with today's lifestyle. It's the simplest way to enjoy the best of technology without giving up what you already have at home.
If you're still unsure which model to choose, consider what you value most: convenience, customization, voice commands, or simply watching TV shows. The answer will show you the clearest path.
It's not just about saving money—it's about making smart, sustainable choices that align with your actual consumption. The era of accessible technology has arrived, and it fits seamlessly into your home.
To deepen your knowledge, TechTudo has a complete analysis of devices compatible with the current Brazilian market.
Frequently Asked Questions
1. My TV doesn't have HDMI. Can I still convert?
Yes, with RCA or AV to HDMI adapters. However, this can reduce image quality, so consider whether it's worth the cost.
2. Do I need to pay a monthly fee to use the devices?
No. The devices themselves are free to use. However, to access content on platforms like Netflix or Disney+, you'll need to subscribe to those services.
3. Do they all work with voice command?
Most do, as long as the remote control has a microphone or is paired with a compatible cell phone/virtual assistant.
4. Can I install any app on a TV Box?
It depends on the model. Some allow APK file installation, but this can be risky. Always choose apps from the official store.
5. Is it difficult to set up?
No. Most devices offer intuitive step-by-step instructions. Within 5 to 10 minutes, everything will be up and running.
If you want to transform your TV today and break away from the basics, the future of your living room is just a connection away. Will you stick with broadcast channels or upgrade smartly?
