We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-05 · 7 min read · Independent comparison
If you want a simple, brand-name adapter that turns a USB-C port into a real 3.5 mm headphone jack, choose Apple USB-C; if you need actual headphones built for kids with a safe volume cap and a wired connection that works on a boat, choose SIMOLIO Kids. This one matters for fishing, because on a boat you want a cable, not a battery that dies halfway through the morning.
• Apple USB-C, biggest strength: it converts a USB-C port into a standard 3.5 mm jack, so any wired headphones or speaker you already own can plug into an iPhone, iPad or other USB-C device.
• Apple USB-C, biggest trade-off: it is an adapter, not headphones. It adds no audio of its own, and it only makes sense if you already have a 3.5 mm device worth plugging in.
• SIMOLIO Kids, biggest strength: it is a complete wired over-ear headset with a built-in mic, USB-C and 3.5 mm connectivity, a three-level safe volume system and a passive noise-isolating over-ear fit.
• SIMOLIO Kids, biggest trade-off: the over-ear, kid-oriented build is bulkier than a bare adapter and it is wired, so you are always tethered to your device.
• Who each pick is for: Apple USB-C for anyone who owns good 3.5 mm headphones or speakers and needs them to work on a modern USB-C phone or tablet; SIMOLIO Kids for a young listener, or an adult who wants a cheap, cable-only headset with volume protection and a share port.
The Apple USB-C to 3.5 mm Headphone Jack Adapter does exactly one job, and it does it without drama. It lets you connect anything with a standard 3.5 mm audio plug, headphones or speakers, to a device that only has a USB-C connector. That is the whole product, and that is the point. There is no battery, no pairing, no firmware, no app. You plug the adapter into your phone or tablet, plug your headphones into the adapter, and you are listening.
The compatibility list is the reason this thing sells. It covers the iPhone 15 family, the iPhone 16 family and the iPhone 17 family, plus a long run of iPad Pro models in both 11-inch and 12.9-inch sizes, including the M4 generation. The adapter works with devices that have a USB-C connector and support iOS 10 or later. It is finished in white, and its dimensions are 2.68 by 0.63 by 2.68 inches, which is small enough to leave on the end of a cable or drop in a tackle box without noticing it.
Who should buy it? Anyone who already owns a pair of wired headphones they trust and wants them back on a newer phone or tablet. If you have a favorite set of over-ears or in-ears with a 3.5 mm plug, this restores them to a USB-C world in one move. Who should skip it? Anyone who does not own a 3.5 mm device, and anyone expecting it to be headphones. It is not. There is no audio driver inside, no mic of its own, and no volume protection. It is a passthrough, and it should be judged as one.
The SIMOLIO Kids Wired Headphones are a different category of product entirely. These are real over-ear headphones, model SM-904, in a purple finish with circular earcups and dynamic drivers. They connect by wire and they offer two ways in: a 3.5 mm jack and USB-C. That dual connection is the smartest thing about them, because it means the same headset works on a tablet with a headphone jack and on a newer phone or laptop that only has USB-C.
The feature list reads like it was written for parents. There is a three-level safe volume system, which is the headline for a kids' product. There is a built-in microphone, so calls and classroom video sessions work. There is passive noise cancellation, meaning the over-ear design physically blocks sound rather than relying on electronics, and it does so without batteries. The earcups use memory foam and the headband is padded, which matters when a child wears them for a long stretch. SIMOLIO also includes a share port and a pouch, and lists a one-year manufacturer warranty.
Who should buy them? A parent who wants a wired headset for a kid without worrying about a battery dying or a volume slider going too high. Also worth a look for an adult who wants a simple, cable-only headset with a mic for calls, and who likes the passive isolation of an over-ear fit. Who should skip them? Anyone who wants wireless freedom, and anyone who needs serious active noise cancellation with adjustable electronics. This is passive isolation, not active cancellation, and the difference is real. The sound profile is described as rich bass with clear mids and highs, which is a friendly tuning for speech, video and casual music rather than a reference-grade monitoring sound. They are also built around a kid-friendly fit, so adults with larger heads should think about whether an over-ear kids' headset will sit comfortably for hours.
Side-by-Side: Which Should You Choose?
• Best for turning a USB-C phone into a 3.5 mm device → Apple USB-C. If your problem is "my headphones no longer fit my phone," this is the fix.
• Best for volume safety with kids → SIMOLIO Kids. The three-level safe volume system is the whole reason this product exists.
• Best for zero battery management → both. Neither has a battery. The Apple adapter is passive, and the SIMOLIO headset is wired with passive noise cancellation.
• Best for taking calls → SIMOLIO Kids. The built-in mic does the work. The Apple adapter only passes audio through to whatever you plug in.
• Best for using the gear you already own → Apple USB-C. If you love your current wired headphones, the adapter keeps them in service.
• Best for quieting a noisy room without electronics → SIMOLIO Kids. Over-ear memory foam cushions block chatter and engine noise physically.
• Best for tossing in a bag and forgetting about it → Apple USB-C. At roughly 2.68 by 0.63 by 2.68 inches, it disappears into a pocket.
In my opinion, these two products only look like competitors because they both touch the 3.5 mm world. If you are shopping for fishing and you want headphones, buy the SIMOLIO Kids. It is a complete wired headset with a mic, a safe volume system, dual USB-C and 3.5 mm connections, a share port and a pouch, and the over-ear fit blocks noise without a battery to charge. I would only choose the Apple USB-C adapter if you already own wired headphones you love and your real problem is that your phone or tablet lost its headphone jack. As an adapter it is excellent at a narrow job. As a pair of headphones, it does not exist.
No. It is a passthrough adapter with no drivers and no mic. It only gives you a 3.5 mm jack on a USB-C device, and you still need to supply your own headphones or speakers.
Do the SIMOLIO Kids headphones work with an iPhone or iPad?
Yes, on the connection side. They offer both a 3.5 mm jack and USB-C, so they cover older devices with a headphone jack and newer USB-C devices. Check the specific model you own for compatibility.
The SIMOLIO Kids headset, because its over-ear design provides passive noise isolation without batteries. The Apple adapter provides no noise reduction at all, since it is not a headphone.
Both are inexpensive relative to full-size wireless headphones, but I cannot quote prices here. Check the current price on Amazon using the button on this page and compare before you commit.
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