Apple Watch/Spotify

The Spotify app on your watch is really just a remote control app for your phone.

One day is pretty normal. I put my watch on the charger at night while I'm getting ready for bed and reading, maybe an hour. I wear it overnight (in Theatre mode). I put it back on the charger in the morning while I'm showering and dressing (maybe 30 minutes). Unless I do a really long workout, that's pretty much all I ever charge it.

Spotify does not support the Apple Watch, except as a remote control for its iPhone app.

You would have to talk to Spotify about when they will support the Apple Watch.

Currently Pandora and Apple Music fully support the Apple Watch (Streaming, offline music, and full Siri integration).

As to battery life. The Apple Watch is rated at 18 hours. When brand new, it should last a bit longer.

However, if you spend a lot of time away from your iPhone, then the cellular radio will drain the battery faster. Also if you are also engaging the GPS while say running without your iPhone with you, that too will drain the battery faster.

And of course if you are away from your iPhone, and making long phone calls, that will drain the battery even faster.

The thing about being away from the iPhone, is that when near the iPhone, the Apple Watch will use Low Energy Bluetooth and get the iPhone with the bigger battery to do most of the heavy lifting for internet access and other radio services.

Read here;

Spotify on Apple Watch

And depending how much you use the watch a full day is acceptable.

Click or tap on the blue text here;

Spotify on Apple Watch