It seems to in my house - possibly the wifi signal is not strong enough where I leave my phone and it is constantly searching. I also find that on wifi data, apps constantly update and sync themselves - they don't do this on metered network data.
>It seems to in my house - possibly the wifi signal is not strong enough where I leave my phone and it is constantly searching
Sounds like you should move your AP? There's no way that communicating with an AP tens of feet away is going to require less power than communicating with a tower hundreds of feet away.
>I also find that on wifi data, apps constantly update and sync themselves - they don't do this on metered network data.
You can set wifi connections to "metered" on both android and ios. It doesn't allow you to cut off data entirely (like you can on cellular data), but should have similar effects to being on cellular.