onn. 4K Streaming Box Review (Walmart): The Hidden Best Value of 2026
Walmart's onn. 4K Streaming Box runs Google TV and costs $20. We review performance, picture quality, app selection, and whether it's actually worth buying over a Roku or Fire TV.
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Walmart's house-brand streaming device costs $20 and runs Google TV — the same OS as Chromecast. It's the cheapest 4K streaming device you can buy from a major retailer. And it's actually good.
This is the review cable company streaming device manufacturers don't want you to read.
Background: What Is the onn. 4K Streaming Box?
Walmart's "onn." brand (note the lowercase) releases house-brand electronics at aggressive price points. The 4K Streaming Box is their most capable streaming product, and unlike some budget devices, it runs a legitimate streaming OS rather than a custom interface.
Google TV is the same OS that powers Chromecast with Google TV. It has:
- A curated home screen that surfaces content from all your subscribed services
- Access to 6,500+ Google Play apps — including every major streaming service
- Google Assistant for voice search ("Hey Google, find action movies on Netflix")
- Chromecast built-in, so you can cast from your phone to the TV
At $20, it's hard to find a legitimate argument against it for buyers who need a basic streaming device.
Setup and Interface
Setup takes 5-10 minutes:
- Plug into HDMI port, plug in power
- Connect to Wi-Fi
- Sign in with Google account
- Google TV pulls in your existing subscriptions from your Google account
The Google TV home screen is a mix of recommendations across all your services — Netflix, Disney+, Max, and others all contribute content to the "For You" feed. It's more dynamic than Roku's static grid, which some users prefer (recommendations surface new content) and others don't (they want to go directly to an app without browsing).
App drawer: Access all installed apps and the Google Play Store by navigating to the Apps tab. Every major streaming service is available.
Performance at $20
For a $20 device, performance is surprisingly adequate. App loading times:
- Netflix: 2-4 seconds to launch, 2-3 seconds to start playing
- YouTube: 2-3 seconds
- Disney+: 3-5 seconds
These times are slower than a $50+ Roku or Fire TV, but not noticeably worse during actual watching. The performance hit shows in:
- Fast back-to-back app switching
- UI animations (slightly choppy compared to premium devices)
- Navigation in complex menus
For casual viewers who open one app and watch for an hour, performance is fine. For power users who switch apps frequently, the $10-20 premium for a Roku Express 4K+ is noticeable.
4K and Picture Quality
The onn. box supports 4K HDR10. Like the Roku Express 4K+, it does not support Dolby Vision or HDR10+.
On a standard 4K HDR10 TV (most 4K TVs without a premium panel), content looks identical to what you'd see on a more expensive device. The TV is doing most of the picture processing — the streaming device just passes through the signal.
For LG OLED or Dolby Vision TV owners: The lack of Dolby Vision is a real limitation. The onn. box will display Dolby Vision content as HDR10. Noticeable on capable panels.
Chromecast Built-In: A Hidden Feature
Chromecast built-in means you can cast any Chrome tab or Android app to the TV — separate from the box's main interface. This is handy for:
- Casting a YouTube video from your phone without switching TV inputs
- Mirroring your laptop screen for a presentation or video call
- Casting from apps that have Chromecast support (most major streaming apps)
At $20, having Chromecast built-in is an unexpected bonus.
Google Assistant Voice Control
The onn. remote has a Google Assistant button. It works well for:
- Content search: "Find documentaries on Netflix"
- Device control: "Turn the volume up," "Pause"
- General queries: "What time does the game start tonight?"
Voice accuracy is on par with other Google TV devices — which is to say, better than Amazon's Alexa for complex content searches, and comparable for simple commands.
Who Should Buy the onn. 4K Streaming Box
Buy it if:
- Budget is the primary concern
- You want Google TV / Google Assistant integration
- You're equipping multiple TVs and cost adds up
- You have a Samsung TV (which doesn't benefit from Dolby Vision anyway)
- You're buying it as a gift or a "just works" device for a non-technical user
Look elsewhere if:
- Your TV supports Dolby Vision (buy Fire TV 4K Max at ~$59 instead)
- You want the cleanest, most stable interface (Roku Express 4K+ at ~$39)
- You're an Amazon household with Prime Video as your main service (Fire TV is better integrated)
- You need to replace it easily anywhere other than Walmart
onn. vs. Roku Express 4K+ vs. Fire TV Stick Lite
| | onn. 4K Box | Roku Express 4K+ | Fire TV Stick Lite | |--|------------|-----------------|-------------------| | Price | ~$20 | ~$39 | ~$28 | | OS | Google TV | Roku OS | Fire OS | | 4K | ✓ HDR10 | ✓ HDR10 | ✗ (1080p only) | | Dolby Vision | ✗ | ✗ | ✗ | | Voice | Google Assistant | Roku voice | Alexa | | Chromecast | ✓ | ✗ | ✗ | | Available | Walmart only | Everywhere | Everywhere |
The onn. box is the best value in the comparison on price alone. Roku's better interface and wider availability give the Express 4K+ an edge for most buyers.
Verdict: 4.0/5
For $20, the onn. 4K Streaming Box is one of the best value propositions in consumer electronics. Google TV's app ecosystem is excellent, Google Assistant is genuinely useful, and Chromecast built-in is a bonus.
The trade-offs — budget build quality, no Dolby Vision, slightly slower performance — are entirely fair at the price. If you're equipping a TV and don't want to spend more than necessary, this works well.
Check Availability: onn. 4K Streaming Box at Walmart →
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Editorial Team
Our editorial team consists of streaming experts who research and test products so you can make informed buying decisions.