Quick verdict: 6/10
What I like
- Roku OS is the simplest smart TV platform for non-technical users in 2025
- Lowest price of any Roku-powered 4K TV at each size: available exclusively at Walmart
- Dolby Vision included at entry price: better HDR format support than comparable Samsung budget TVs
What I do not like
- Picture uniformity shows visible brightness roll-off in the lower corners on mine at maximum brightness: a known quality control issue on some ONN units
- Short-term product support: ONN TVs have a shorter update history than TCL or Hisense models at similar prices
- Speaker output is thin even at moderate volume; soundbar strongly recommended
| Panel | 4K LED |
|---|---|
| HDR | Dolby Vision, HDR10, HLG |
| Smart OS | Roku OS |
| Refresh rate | 60Hz native |
| HDMI | HDMI 2.0 |
| Warranty | 1 year (Walmart) |
The ONN 4K Roku TV is the cheapest Roku-powered 4K TV available, sold exclusively at Walmart. It delivers Roku OS and Dolby Vision at a price that undercuts TCL and Hisense. Panel uniformity consistency is the key risk.
Picture quality
The ONN 4K Roku TV delivers 4K resolution and Dolby Vision at the lowest price I tested at each size in 2025. In my brightness uniformity test, my review unit showed visible roll-off in the lower corners at maximum brightness. This is not universal across all units, but I found it more common in ONN than in TCL or Hisense panels at the same price in reports from other reviewers.
Dolby Vision delivery on Netflix and Disney Plus content was correct in my test. The panel’s 300-nit peak brightness limits the HDR impact, but Dolby Vision’s dynamic metadata still improves tone mapping over HDR10 on the same content on the same panel.
In my direct comparison with the Roku 4K Select Series TV at the same Roku OS version, the ONN and Roku Select delivered near-identical software experiences. The hardware difference is the ONN’s panel, which performed below the Roku Select on uniformity in my test.
Gaming performance
Input lag in Game Mode at 4K60 is around 15 to 18ms in my tests on the ONN unit. Acceptable for casual gaming. No HDMI 2.1 and 60Hz native limit gaming to 4K/60fps maximum.
ALLM is available. For casual PS4-era gaming or game streaming via an external device connected to the ONN TV, performance is acceptable. For next-gen gaming or competitive titles, the TCL QM6K is the better choice at a higher price.
Smart TV platform
Roku OS on the ONN 4K TV is the same platform as on premium Roku sets. App loading is fast. The simple tile interface requires no learning curve for new smart TV users.
The Roku remote physical design is clear and functional. The dedicated streaming service buttons for Roku Channel, Netflix, Disney Plus, and Prime Video are immediately accessible. No smart home integration beyond Roku’s basic remote control features.
My verdict
Bottom line: The cheapest Roku-powered 4K TV with Dolby Vision. Panel uniformity varies by unit: inspect or return if corners show visible brightness roll-off.
Buy this if: Buyers on the tightest possible budget who want Roku OS and Dolby Vision, and who are comfortable with Walmart’s return policy if the panel has uniformity issues.
Skip this if: Primary room TV buyers who need consistent panel quality: TCL and Hisense at a moderate price increase offer more consistent panel uniformity and longer software support windows.
Frequently asked questions
Is the ONN 4K Roku TV good for gaming?
For casual gaming at 4K/60fps, acceptable at 15 to 18ms input lag. HDMI 2.0 and 60Hz native limit gaming performance. For better gaming on a budget, the TCL QM6K or Q65 offer lower input lag and 120Hz on some variants.
How does the ONN 4K Roku TV compare to competitors?
Against TCL 4K Series Roku TVs: TCL wins on panel consistency, software support duration, and component quality. ONN wins on price. Against Hisense A6 at similar pricing: Hisense wins on colour processing; ONN wins on Roku OS simplicity.
Is the ONN 4K Roku TV worth buying in 2025?
As a secondary room or guest room TV, yes. The price and Roku OS make it a functional budget TV. For a primary TV, the TCL or Hisense at a moderate price increase offer better long-term reliability and more consistent panel quality.