Refresh rate went from spec-sheet footnote to headline feature — phones advertise 120Hz, gaming monitors race past 240Hz, and “smooth” became a selling point. Here’s what the number actually means, where the improvement is real, and where you’re paying for digits you cannot see.
What the number means
Hertz is how many times per second the screen redraws. At 60Hz you get a new image every 16.7 milliseconds; at 120Hz, every 8.3ms; at 240Hz, every 4.2ms. More redraws mean motion is sampled more finely — scrolling text stays readable instead of smearing, animations track your finger more closely, and in games, what you see sits closer to what’s happening.
The law of diminishing returns (the part marketing omits)
Notice the math: 60→120Hz cuts the frame interval by 8.4ms — a difference most people perceive instantly; scrolling on a 120Hz phone next to a 60Hz one is night and day. But 120→240Hz saves only 4.1ms more, and 240→360Hz barely 1.4ms — each doubling buys half as much, and human perception runs out of resolution along the way. Most people genuinely cannot distinguish 240 from 360 in normal use; competitive players benefit from the latency edge more than the visible smoothness.
What it costs
Battery, mostly — redrawing twice as often is real work, which is why phones use adaptive refresh (LTPO): ramping to 120Hz while you scroll, idling at 1–10Hz on a static page. This is also the honest answer to “does 120Hz drain my phone?” — on modern adaptive panels, barely; on cheaper fixed-rate 120Hz panels, noticeably. On PCs the cost is GPU load: driving 240 frames per second requires a graphics card that can produce 240 frames, which in modern titles is a far bigger purchase than the monitor.
The spec that needs a partner
A high-refresh screen only shows frames something delivers. A 165Hz monitor on a GPU producing 70fps shows… 70fps (this is where variable refresh — G-Sync/FreeSync — earns its keep by syncing screen to GPU and eliminating tearing). Same logic on phones: the panel is 120Hz, but the app, the animation and the chip decide whether you ever see it.
Buying advice per device
Phones: 90–120Hz adaptive is the floor for a pleasant 2026 phone, and even budget models (Pixel 9a included) deliver it — accept no 60Hz phone above $250. Laptops: 120Hz is a lovely quality-of-life upgrade for scrolling and note-taking; beyond that matters only for gaming machines. Monitors: office work is content at 60–100Hz; gaming hits its value peak at 144–165Hz; 240Hz+ is for esports enthusiasts who can name their reaction time. TVs: 120Hz matters for gaming consoles and sports; the “960Hz motion rate” stickers are interpolation marketing, not panel refresh — the real number is in the fine print.
The takeaway
The 60→120Hz jump is one of the few specs whose improvement everyone perceives — worth paying for everywhere. Past 165Hz, you’re buying milliseconds only competitors feel. Spend the difference on the GPU, the battery, or literally anything else on the spec sheet.
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