I use Zero as my timer and the withings body+ scale. Very happy with both.

https://www.amazon.com/Withings-Nokia-Body-Composition-smartphone/dp/B071CMGR9C

I got this for Christmas and absolutely love it.

Not going to lie, the BF% can be all over the place sometimes so I also will use a handheld Omron BF monitor as a back up from time to time.

But I love how it automatically syncs with my phone and with MyFintess pal / other apps, etc.