We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-25 · 6 min read · Independent comparison
If you want serious noise cancellation and a bass-forward in-ear fit for commutes and gaming, choose realme Buds; if you need an open-ear design that stays comfortable for hours and lets you hear the world around you, choose QCY Crossky C30S.
• realme Buds biggest strength: Hybrid active noise cancellation rated at up to 50dB, plus a 13.6mm dynamic bass driver and 360° Spatial Audio. Its biggest trade-off is the sealed in-ear design, which blocks outside noise — great for focus, less ideal if you need to stay aware of traffic or coworkers.
• QCY Crossky C30S biggest strength: An open-ear earhook design at under 5g per earbud with an anti-Z-shaped nickel-titanium clip, plus Hi-Res/LDAC audio support. Its biggest trade-off is that open-ear earbuds naturally let ambient sound in, so they can't isolate you the way a sealed ANC in-ear can.
• Pick realme Buds if you want maximum quiet, deep bass, and a low-latency gaming mode in a traditional in-ear wireless headphone.
• Pick QCY Crossky C30S if you want all-day comfort, situational awareness, and lossless-ish Hi-Res listening in an open, clip-on form factor.
The realme Buds (Wireless 5 ANC) are built around one big idea: shut out the world. The headline feature is hybrid active noise cancellation rated at up to 50dB, which is the kind of figure that matters on a noisy train, a busy open office, or a flight. Because it's a sealed in-ear design with a plastic housing and a 13.6mm dynamic driver, the tuning leans toward powerful bass — realme pairs that with 360° Spatial Audio for a wider, more theater-like soundstage.
Battery is the other standout. Realme rates total playback at up to 38 hours, so you're charging the case far less often than you'd expect. Add IP55 dust and water resistance and a 45ms low-latency gaming mode, and this becomes a genuinely versatile everyday headphone for music, calls, video, and mobile gaming. Dual device connection means you can stay paired to a phone and a laptop and switch between them.
Who should buy it? In my opinion, the realme Buds suit commuters, frequent flyers, gamers, and anyone who wants bass-heavy sound and real noise blocking. The in-ear fit plus touch controls keep things simple. Who should skip it? If you dislike things sitting inside your ear canal, or you need to hear your surroundings for safety — cycling, running near traffic, or an office where people tap you on the shoulder — the isolating design works against you. This is a headphone you buy to escape noise, not to stay aware of it.
The QCY Crossky C30S goes the opposite direction: it's an open-ear earbud with an earhook shape, so the driver sits outside your ear canal rather than sealing it. Each earbud weighs less than 5 grams, and QCY uses an anti-Z-shaped clip with a nickel-titanium alloy frame that flexes to fit different ear shapes. The result is a stable, pressure-free fit that doesn't plug your ears — you hear your music and the world at the same time. That's the whole point, and for long workouts, runs, and commutes it's a genuinely different experience from an in-ear.
On audio, QCY leans on specs: 10.8mm dual-magnet dynamic drivers, a carbon fiber diaphragm, Hi-Res Audio and LDAC dual certification, and support for 96kHz/24bit lossless playback. The frequency range runs from 20Hz to 40kHz, and QCY describes dynamic tuning that rebalances frequencies many times per second for a 360° spatial effect. This is a more "audiophile spec sheet" approach than the realme's bass-and-ANC pitch.
Battery is rated at 6 hours per charge and up to 40 hours total via the 460mAh charging case, with a 10-minute USB-C quick charge good for about an hour of playback. Connectivity is Bluetooth 6.0 with dual-device pairing, and the earbuds carry an IPX5 water-resistance rating. There's also app control, and QCY notes you can use the app in guest mode without registering.
Who should buy it? In my opinion, the Crossky C30S fits runners, cyclists, gym-goers, and people who wear earbuds all day and hate the "plugged up" feeling of in-ears. It's also a strong pick if you want situational awareness and Hi-Res/LDAC support. Who should skip it? Anyone who wants maximum noise isolation. Open-ear earbuds leak sound in by nature — QCY works hard to cut leakage out (claiming up to 99.5% reduction via directional audio), but they still won't silence a plane cabin the way sealed ANC does. If you need a quiet bubble, look elsewhere.
• Best for noise cancellation → realme Buds. Hybrid ANC rated up to 50dB is the single biggest differentiator here.
• Best for all-day comfort and awareness → QCY Crossky C30S. Under 5g per earbud with a flexible nickel-titanium open-ear clip.
• Best for bass-heavy everyday listening → realme Buds. A 13.6mm dynamic driver plus 360° Spatial Audio pushes low end.
• Best for Hi-Res and lossless-style audio → QCY Crossky C30S. LDAC and Hi-Res Audio certification with 96kHz/24bit support.
• Best for gaming and video sync → realme Buds. A 45ms low-latency mode edges out the QCY's 60ms figure on paper.
• Best for total battery life → a near tie, but realme Buds leads. Up to 38 hours total versus QCY's 40-hour case figure — the realme number is the headphone's own rating, while QCY's 40 hours relies on the case, with 6 hours per charge.
• Best for workouts and sweaty sessions → QCY Crossky C30S. IPX5 waterproofing and an open fit that stays stable during movement; realme offers IP55, which also handles dust and splashes.
• Best for staying reachable on two devices → both. Each supports dual-device connection.
If I had to buy one, I'd take the realme Buds for most people. The 50dB ANC, 13.6mm bass driver, 45ms low-latency mode, and up to 38 hours of playback cover the widest range of everyday situations — commuting, working, gaming, and just listening. I'd only switch to the QCY Crossky C30S if comfort and situational awareness matter more to you than silence, or if Hi-Res/LDAC audio is a priority. In my opinion, realme wins the "block out the world" job; QCY wins the "stay in the world" job. Decide which one you actually need, then check the current price on Amazon before you commit.
FAQ
Yes, on specs. The realme Buds use hybrid active noise cancellation rated up to 50dB, while the QCY Crossky C30S is an open-ear design that intentionally lets ambient sound in. If blocking noise is your priority, realme is the clearer choice.
That's their sweet spot. At under 5g per earbud with a flexible nickel-titanium clip and IPX5 water resistance, they're designed to stay put during runs and training while keeping you aware of your surroundings.
They aim at different things. QCY leans on Hi-Res/LDAC certification and 96kHz/24bit support with 10.8mm dual-magnet drivers; realme focuses on a 13.6mm bass driver and 360° Spatial Audio. Pick QCY for detailed, lossless-style listening and realme for punchy, immersive bass.
Yes. The realme Buds list dual device connection, and the QCY Crossky C30S supports connecting to two devices simultaneously via Bluetooth 6.0.
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See also: realme Buds Air 7 vs TOZO Hybrid Active Noise: Hybrid ANC, Stiive 5.3 vs IKG Ear Buds, Amazon Renewed Beats Solo Buds vs CoolJumper 6.1