The fastest streaming device we build for is the Apple TV 4K, and it is not close. The best value is a Google TV box with at least 2 GB of memory. And the word printed biggest on every box, 4K, tells you almost nothing about how fast the thing will feel once you start using apps on it.

We are the team behind MarketCast, a stock market app for TV. Every week we build and test the same app on Fire TV, Google TV and Android TV, and Apple TV, on a shelf of sticks and boxes old and new. What follows is what we see on that shelf, plus the published specs for the devices people are buying this fall. No made-up benchmark scores, just what feels fast, what does not, and why.

Why 4K on the box does not tell you how fast a streaming stick is

Playing a 4K movie is mostly handled by a dedicated video decoder inside the chip. That part is cheap, and nearly every stick has a good one. So a stick can play Netflix in 4K beautifully and still take two seconds to open a menu, stutter while you type in a search box, or reload an app every time you come back to it.

The parts that decide how an app feels are the processor, the graphics, and above all the memory (RAM). Menus, keyboards, sign-in screens, charts and anything animated run on those, not on the video decoder. If you mostly watch one streaming service, almost any current device is fine. If you switch between apps, use live screens like sports scores or a market dashboard, or leave something running all day, memory is the spec to look at.

How much RAM does a streaming stick need?

Our short answer: 2 GB or more. Here is what we see across the Fire TV family, which is the clearest example because Amazon has sold sticks at three memory levels:

• 1 GB: Fire TV Stick 2nd and 3rd gen, Fire TV Stick Lite. They work, but apps get pushed out of memory when you switch away and have to start over when you come back.
• 1.5 GB: the original 2018 Fire TV Stick 4K. Fine for video. For an app that stays on screen for hours, it is tight. On this stick a live market screen left running overnight can run out of memory, and we had to shrink our image caches and even our QR codes to keep it comfortable. MarketCast runs a lighter display mode on it for that reason.
• 2 GB: Fire TV Stick 4K Max, the 2023 Fire TV Stick 4K, Fire TV Cube. This is where Fire TV stops feeling like a compromise.

The pattern holds on other platforms too. The devices that never give us trouble all have well over 2 GB. The ones that do are almost always at 1 to 1.5 GB, or are TVs with a weak chip.

What actually feels fast when we test

Apple TV 4K. The smoothest platform we build for, by a wide margin. Scrolling, scene transitions and charts all just run. The 2022 model has an A15 chip and 4 GB of memory, and it still feels quick. Apple announced a new Apple TV 4K on October 13, 2026 with an A19 chip and 8 GB of memory, sold in one 128 GB version for $299 and shipping November 13. That is a lot of money for a streaming box, and the 2022 model is already more than fast enough for anything we do.

Google TV Streamer. Fast, and the device we point Android-side people to when they want one box and no worrying. It has 4 GB of memory, 32 GB of storage and a built-in Ethernet port, with a list price of $99.99.

Walmart onn 4K and onn 4K Pro. The value pick. The onn 4K Pro has 3 GB of memory and an Ethernet port, and Walmart refreshed it in 2026 with a newer Amlogic chip at about $60. The plain onn 4K box is cheaper with 2 GB. Both run full Google TV and install apps from Google Play, and both run every MarketCast scene as designed.

Fire TV Stick 4K Max. The Fire TV stick to buy. 2 GB of memory, the full Fire TV app catalog, and Amazon puts it on sale often. If your household runs on Prime and Alexa, this is the one.

Fire TV Cube. Amazon's fastest Fire TV and the one we would put in a home office that shows the market all day. It costs a lot more than the 4K Max, and for most living rooms the stick is enough.

Cheap TVs with Google TV built in. This is where we see the most stutter. Low-cost white-label Google TV sets with weak chips lag in the places that need the processor most: search screens, on-screen keyboards and sign-in flows. If your TV is one of these, a $60 box in its HDMI port often feels like a new TV. Our older guide to speeding up a slow Android TV helps, but it cannot add memory.

The Fire TV Stick 4K you buy today is not the one you remember

This is the trap in Amazon's lineup right now. On September 30, 2026 Amazon announced a new 3rd-gen Fire TV Stick 4K at $59.99. It runs Vega OS, Amazon's new Linux-based system, instead of Android, and it has 1 GB of memory, half of the 2023 model it replaces. It also replaced the Fire TV Stick 4K Select and the Fire TV Stick 4K Plus, which was the 2023 Android stick under a new name. That leaves the 4K Max as the only Android-based stick Amazon still sells new.

Vega has less overhead than Android, which is how Amazon gets away with 1 GB. The bigger difference is apps: Android apps do not run on Vega, there is no sideloading, and the app catalog is much smaller. Some Android apps, MarketCast included, reach Vega sticks through a program where Amazon runs the app in its data center and streams the screen to the stick. We wrote a full explainer on what Vega OS means for your apps. If you are buying a Fire TV stick today and you care about a specific app, read that first.

What about Roku?

Roku sells sticks and boxes at the same prices as everyone above, and plenty of people are happy with them for video. We cannot tell you how a live market app feels on one, because MarketCast is not on Roku. A Roku app is a separate app in its own language, and we explain that trade-off in why MarketCast is not on Roku. If you own a Roku TV, any of the devices on this page plugs into a spare HDMI port.

Which streaming device should you buy? Our pick by budget

• Cheapest that still feels good: the Walmart onn 4K. Full Google TV, 2 GB of memory, and the lowest price on this list. Skip any new device with 1 GB of memory unless all you watch is one or two big video services.
• Around $60: the onn 4K Pro if you are open to Google TV, or the Fire TV Stick 4K Max if you live in Amazon's world. Not the new Fire TV Stick 4K, unless every app you use is already on Vega.
• Around $100: the Google TV Streamer. Plenty of memory, wired Ethernet, and room to spare for years.
• Price is not the point: an Apple TV 4K. The 2022 model if you can still find it, or the new A19 model from November 13. Either one is the nicest TV experience we know of.

Already own a slow stick? Before you replace it, try the fixes in why your Fire TV Stick is slow and how to fix it. If it is the 2014 original, it is stuck on Fire OS 5 (Android 5.1) and it is time, as we explain in why you should upgrade your 1st gen Fire TV Stick.

Put the new device to work

Whatever you buy, MarketCast is a free download on Fire TV, Google TV and Android TV, and Apple TV. Put on the Stream, a live stock market channel for your TV that plays your stocks, the indexes, the day's movers and headlines with a ticker tape along the bottom. It is a good test of a new box, too: if the Stream runs smoothly all afternoon, the device has enough memory. Our supported devices page shows how MarketCast runs on each model, and the best smart TVs and streaming devices for investors covers the TV side.