Well, the Xiaomi Mi Band 2 Smart Wristband solves that problem and has a display on it.
Now, the Xiaomi Mi Band 2 Smart Wristband claims to last up to 20 days on a single charge and take only 3 hours at most to charge when the battery is depleted, this means you can keep it on your wrist longer so it can collect more data. As this OLED display smartwatch sets into the band and is flat and smooth there are no edges to bump or worry about. This smart band is also IP67 waterproof which is true waterproof in that you can hold it under water up to 4′ deep for up to 30 minutes and not risk ruining the device. So this means you could swim with it on in a pool too.
The Mi Band 2 boasts a high precision sensor for monitoring your heart rate in real time while doing any physical activity.
Now the Mi Band 2 has an ADI Accelerometer which means it will do a great job of tracking motion for running and jogging. The MiFit application is what it syncs to and this app can monitor your sleep activity as well as integrate it with Android or iOS Health Kit.
The vibration alert functionality allows the watch to vibrate for silent alarm (waking up), phone call alerts (vibrate only, it won’t show callerID on watch), and SNS notification vibration alerts.
The Mi Band 2 is a good step up from the original Mi Band for those who just had to have a touch screen that displayed time as well as the data collected from the fitness watch, the lack of a screen was the biggest detractor from the Mi Band 1S for me.