How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a genuinely distinctive pair of earbuds with a metal build, RGB flair and an app that lets you tune the sound your way, choose GravaStar Sirius Plus True; if you need bigger drivers, a higher water-resistance rating and more ear-tip sizes for a personalized fit, choose FENNIDICE Earbuds Pro 3.
• GravaStar Sirius Plus True — biggest strength: a premium aluminium alloy body plus app-based EQ customization and a 6-color RGB ambient light that make it feel like a fashion-tech accessory, not just a listening tool.
• GravaStar Sirius Plus True — biggest trade-off: IPX4 water resistance and a plastic/silicone charging case mean it's built for sweat and light rain, not heavy exposure, and its controls run through the app rather than touch gestures on the bud.
• FENNIDICE Earbuds Pro 3 — biggest strength: 13mm dynamic drivers and IPX5 protection, with four ear-tip sizes (XXS, XS, S, L) for a more tailored seal.
• FENNIDICE Earbuds Pro 3 — biggest trade-off: a plastic-and-silicone build with no customization app and no RGB or novelty features, so it's purely functional rather than showy.
• Who each pick is for: GravaStar for buyers who want personality, app tuning and a premium metal finish; FENNIDICE for buyers who want larger drivers, tougher splash resistance and a fit they can dial in.
The Sirius Plus True leans hard into design as a feature. The housing is high-grade aluminium alloy, which gives it a solid, minimalist feel that most plastic earbuds simply don't have. On top of that you get a 6-color gradient RGB ambient light, a one-touch pop-up lid and even a bottle opener worked into the design. That's an unusual combination, and it tells you exactly who GravaStar is courting: someone who treats their earbuds as part of their look.
Battery is rated at 7 hours per charge and 28 hours total with the case, with a 1.5-hour charge time. IPX4 covers sweat and light rain, so gym sessions and outdoor runs are fine. Buy it if you want earbuds that look and feel premium, let you shape the sound, and add a bit of fun. Skip it if you need maximum water protection, a wider range of ear-tip sizes, or you'd rather have simple on-bud touch controls instead of app-based control.
FENNIDICE Earbuds Pro 3: Who It's For
The FENNIDICE Earbuds Pro 3 is the more straightforward, spec-forward option. The headline is the 13mm dynamic driver — noticeably larger than the GravaStar's 10mm — paired with 32 ohm impedance. Larger drivers generally move more air, which is why FENNIDICE positions these for full bass, natural vocals and detailed stereo sound across music, podcasts and audiobooks. If you listen to a lot of spoken word or bass-heavy tracks and want that low-end presence without fiddling with an EQ, this is the design logic working in your favor.
It also edges ahead on protection and fit. IPX5 water resistance handles sweat and light splashes with a bit more headroom than IPX4, and the box includes four ear-tip sizes — XXS, XS, S and L — so you can chase a proper seal instead of settling for whatever's in the box. A secure in-ear fit plus a lightweight ergonomic shape makes it a sensible pick for running, training and long commutes.
Controls are touch-based on the bud itself: play/pause, volume, calls and voice assistant, no app required. Bluetooth 5.3 gives a stable connection with a rated 10-meter range, and the case opens to quick-reconnect with previously paired devices. Battery is listed at 6 hours per charge and up to 30 hours total with the case, with USB-C charging and a 1.5-hour charge time. Buy it if you want bigger drivers, better splash resistance and a customizable fit at a no-nonsense level. Skip it if you want app-based EQ, a metal build or any of the RGB personality the GravaStar brings.
• Best for a premium, distinctive look → GravaStar Sirius Plus True. Aluminium alloy body, RGB ambient light, pop-up lid and bottle opener set it apart from generic plastic buds.
• Best for driver size and low-end presence → FENNIDICE Earbuds Pro 3. 13mm drivers versus 10mm on the GravaStar.
• Best for sound customization → GravaStar Sirius Plus True. The app lets you adjust EQ and remap controls; FENNIDICE relies on fixed tuning.
• Best for water and sweat protection → FENNIDICE Earbuds Pro 3. IPX5 beats IPX4 for splash and sweat exposure.
• Best for a personalized fit → FENNIDICE Earbuds Pro 3. Four ear-tip sizes (XXS, XS, S, L) versus the GravaStar's rounded tips.
• Best for total battery life → FENNIDICE Earbuds Pro 3, at up to 30 hours with the case versus 28 hours on the GravaStar — though the GravaStar gives you more per-charge playtime at 7 hours versus 6.
• Best for control style → depends on you. GravaStar runs through the app; FENNIDICE uses on-bud touch controls for play, volume and calls.
• Best for fun-factor and gifting → GravaStar Sirius Plus True. The RGB lighting and novelty features make it the more memorable object.
If I were buying for myself, I'd take the GravaStar Sirius Plus True. In my opinion, the aluminium alloy build, the app-based EQ and the RGB personality make it the more enjoyable product to own day to day, and 7 hours per charge plus 28 total is plenty for commutes and workouts. I'd steer you to the FENNIDICE Earbuds Pro 3 instead if larger 13mm drivers, IPX5 protection and a four-size ear-tip fit matter more to you than looks and tuning. Both are solid; they just reward different priorities. Check the current price on Amazon for each before you commit.
Not universally. The GravaStar wins on build quality, app customization and design flair. The FENNIDICE wins on driver size (13mm vs 10mm), water resistance (IPX5 vs IPX4) and ear-tip variety. It comes down to which of those you value.
They're close. The GravaStar gives 7 hours per charge and 28 hours total; the FENNIDICE gives 6 hours per charge and up to 30 hours with the case. So GravaStar wins per charge, FENNIDICE wins on total.
Yes. Both use hybrid active noise cancellation plus ENC microphones for calls. GravaStar adds a Transparent mode for staying aware of your surroundings, and both connect via Bluetooth 5.3.
The FENNIDICE has the edge for intense training thanks to IPX5 protection and four ear-tip sizes for a secure seal. The GravaStar's IPX4 handles sweat and light rain fine, but it's the less rugged of the two.
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