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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a straightforward pair of sweat-resistant earbuds with long single-charge playback and the flexibility to share audio with a second person, choose Spracht Zum Truly; if you need a smartwatch and earbuds combined into one wearable package with fitness tracking built in, choose Tuanzi JM03.
• Spracht Zum Truly — biggest strength: Up to 14 hours of music playback per charge, IPx7 waterproofing (submersible up to 3 feet for 30 minutes), and a charging case that charges wirelessly.
• Spracht Zum Truly — biggest trade-off: It's earbuds only. No watch, no fitness tracking, no heart-rate monitoring. If you wanted a wearable on your wrist too, this doesn't do that.
• Tuanzi JM03 — biggest strength: A 2-in-1 design that puts a 1.28-inch round touchscreen smartwatch and TWS earbuds into a single product, with health monitoring and multi-sport tracking.
• Tuanzi JM03 — biggest trade-off: The earbuds themselves only play for about 2.5 hours continuously, and the earphones are not waterproof — only the watch body carries a life-waterproof rating.
• Who Spracht Zum Truly is for: Anyone who mainly wants reliable earbuds for workouts, commutes, and long listening sessions.
• Who Tuanzi JM03 is for: Anyone who wants one device that covers both wrist-worn fitness tracking and occasional earbud use.
The Spracht Zum Truly is built around one job: being earbuds you can actually wear for a long time without babysitting the battery. The spec sheet lists up to 14 hours of music playback and up to 130 hours of standby, with a recharge time of about 1.5 hours. That's a genuinely long single-session figure for true wireless earbuds, and it changes how you use them. You can wear them through a full workday, a long flight, or a multi-hour study block without reaching for the case.
The second thing that stands out is durability. These are rated IPx7 waterproof, which the sheet describes as protection up to 3 feet for 30 minutes. Practically, that's the difference between earbuds you're nervous about and earbuds you just use. Sweat during a run, rain on a walk, a water bottle spill at the gym — the rating covers that territory. The enclosure mixes plastic, rubber, and silicone, which suggests the kind of soft-touch, grippy build that sits comfortably in the ear during movement.
There's also a genuinely uncommon feature here: the buds can pair as stereo, or each bud can pair individually for two users. If you and a partner or friend want to share one audio source — a movie on a tablet, a podcast on a phone — that's a real capability most cheap TWS earbuds simply don't offer. Multipoint pairing with up to two devices adds to the flexibility, so you can jump between a phone and a tablet without re-pairing every time.
If battery life or water resistance matters most to you, my recommendation is the Spracht Zum Truly, and you can check the current price on Amazon.
Tuanzi JM03: Who It's For
The Tuanzi JM03 takes the opposite approach. Instead of perfecting one thing, it bundles two: a 1.28-inch round color touchscreen smartwatch and a pair of TWS Bluetooth earbuds in a single package. The watch runs on a 350 mAh lithium-polymer battery, and the sheet lists 5–15 days of use and over 30 days of standby when you're using the watch without the earphones. The earphones themselves play continuously for roughly 2.5 hours.
The watch side is where the feature list gets dense. It covers 24-hour continuous heart rate, sleep tracking, blood pressure monitoring, and a sedentary reminder. There's exercise tracking through a pedometer, calorie counts, and mileage, plus multiple sport modes. You also get information alerts, an alarm clock, call reminder and rejection, message push, multi-language support, a dial (watch face) switcher, raise-to-wake, shake-to-take-a-photo, and a find-my-phone function. It pairs through the BrandFit app, and compatibility runs from Android 6.0 and iOS 8.0 upward.
Physically, it's a black silicone-band watch with a 22 mm band width and a 26 cm strap length, weighing 141 g. The round case and silicone materials read as a sporty, everyday wearable rather than a formal watch. Bluetooth calling is supported, so you can take calls through the device.
Now the honest trade-offs. First, the earphones are explicitly not waterproof, and the watch is only listed as life waterproof — not water resistant in the swimming sense. The description even notes that you should wipe sweat off the earphones before returning them to the charging case, which tells you the manufacturer expects sweat exposure to be a concern. Second, there's no GPS, despite GPS being listed as a supported satellite navigation system in one field — the "GPS geotagging functionality" field says No GPS, so treat navigation as app-dependent, not built in. Third, the 2.5-hour earbud playback is short; the big battery numbers apply to watch use without earphones.
Who should buy it? Someone who wants one purchase that covers both a fitness-tracking watch and occasional wireless listening — a first smartwatch buyer, a casual gym-goer, or someone who likes the idea of fewer separate gadgets to charge. Who should skip it? Anyone who needs earbuds for long sessions, heavy sweating, or wet conditions.
• Best for battery life → Spracht Zum Truly. Up to 14 hours of playback versus roughly 2.5 hours on the Tuanzi earphones.
• Best for workouts and sweat → Spracht Zum Truly. IPx7 waterproofing up to 3 feet for 30 minutes; the Tuanzi earphones are not waterproof.
• Best for sharing audio with someone else → Spracht Zum Truly. Each bud can pair individually for two users, and multipoint handles two devices.
• Best for fitness and health tracking → Tuanzi JM03. Heart rate, sleep, blood pressure, pedometer, calories, mileage, and multi-sport modes are all built in.
• Best for one-gadget convenience → Tuanzi JM03. A watch and earbuds in a single package with Bluetooth calling.
• Best for wireless charging → Spracht Zum Truly. The case charges wirelessly; the Tuanzi sheet doesn't list wireless charging.
• Best for a wrist-worn screen → Tuanzi JM03. The 1.28-inch round touch display is something the Spracht simply doesn't have.
• Best for daily wearable stamina → Tuanzi JM03. 5–15 days of watch use and 30-plus days of standby (without earphones) is a long stretch between charges.
In my opinion, the Spracht Zum Truly is the safer buy for most people shopping cheap TWS earbuds. Fourteen hours of playback, an IPx7 waterproof rating, wireless case charging, and the two-user bud-sharing trick are all things you'll actually use — and they're the things that make earbuds feel reliable rather than disposable.
The Tuanzi JM03 is the more interesting product, and I'd recommend it to a specific buyer: someone who wants a fitness-tracking watch first and treats the earbuds as a bonus for short calls and music. If listening is your priority, the 2.5-hour earbud life and the non-waterproof buds will frustrate you. If tracking is your priority, it's a lot of device for one purchase. Check the current price on Amazon for both before deciding, since that's the one variable that can flip this call.
FAQ
TWS stands for "true wireless stereo" — earbuds that connect to each other and your phone over Bluetooth with no wire between them. Both products here use TWS-style Bluetooth audio, though the Tuanzi JM03 pairs its earbuds with a smartwatch rather than a standalone charging case.
There's no single answer, because true wireless earbuds span a very wide range depending on brand, battery, and features. The page has a button to check the current price on Amazon for both models, which is the accurate way to compare cost right now.
Charge the case first, then take the buds out and put them in pairing mode, and select them from your phone's Bluetooth menu. For the Spracht Zum Truly, you can also pair each bud separately or connect to two devices at once; for the Tuanzi JM03, pair through Bluetooth and manage the watch through the BrandFit app.
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