Choosing running watches & heart-rate gear comes down to one immediate question: do you need a way to measure workout effort, or a way to hear music while you train? ROCKBROS and Mpow serve different jobs, so the small listed-price gap should not decide the purchase by itself.
Quick verdict
Choose the ROCKBROS Heart Rate Monitor if your training is centered on a chest strap and heart-rate readings. Choose the Mpow Open Earphone if you want running headphones with open-ear listening, MP3 playback, and a swimming use case. The listed prices differ by $1.25, making the intended workout role more important than the gap.
At a glance
| Product | Listed price | Main purpose | Notable attributes |
|---|---|---|---|
| ROCKBROS Heart Rate Monitor | USD 34.84 | Heart-rate monitoring | Chest strap, Bluetooth 4.0, ANT+, IP67 waterproofing |
| Mpow Open Earphone | USD 36.09 | Audio for running, cycling, and swimming | Open-ear design, Bluetooth and MP3 modes, 32GB built-in memory |
Where each product wins
- ROCKBROS wins for heart-rate-first training. Its product title directly identifies a heart rate monitor and chest strap, with Bluetooth and ANT connectivity for workout use.
- Mpow wins for audio-first workouts. Its open-ear format is aimed at running and cycling, while the MP3 mode is relevant to the swimming use named in the product title.
- ROCKBROS wins when the torso-worn format is the deciding factor. The listed attachment and body area make its intended placement clear.
- Mpow wins when stored playback matters. The earphone combines MP3 functionality with 32GB of built-in memory.
Product notes
ROCKBROS Heart Rate Monitor
The ROCKBROS Heart Rate Monitor is the right match for a runner whose priority is workout data rather than audio. Its title identifies a Bluetooth ANT chest strap for cycling and running, and it also has a heart-rate alarm, dual-mode connectivity, magnetic charging, and IP67 waterproofing. The listed attachment is a chest strap and the body area is the torso, so the format is specific rather than an all-purpose wearable. The limitation is equally specific: the stated role centers on monitoring, not the open-ear listening and stored playback offered by Mpow. Choose ROCKBROS when that chest-strap format and heart-rate function fit your plan. Pass on it in this matchup when running headphones or underwater audio is the main goal.
Mpow Open Earphone
Mpow Open Earphone makes the clearest case when your training includes music, audiobooks, or swimming. The title calls out wireless open-ear use for running and cycling, while the earphone combines Bluetooth and MP3 modes, bone conduction, magnetic charging, and built-in 32GB memory. That gives the listening side of this comparison a defined use case without turning the 230mAH capacity or two-hour charging time into a performance claim. The limitation is explicit: Bluetooth does not work underwater, so swimming requires MP3 mode. Pick Mpow when open-ear headphones and stored playback matter; choose ROCKBROS instead when the concrete need is a chest-strap heart-rate monitor.
Final choice by use case
For a running heart-rate monitor, choose ROCKBROS: the chest-strap design and heart-rate-monitor title match training sessions where effort data is the priority. For running headphones, choose Mpow: its open-ear format, MP3 mode, and swimming-oriented title make it the audio-focused option. If both use cases appeal to you, decide whether measuring heart rate or carrying stored audio is the function you will use most often.
