Phone Swing Step Counter Pedometer Compatible with Pokemon Go | eBay
Phone Shaker For Steps Counter Compatible For Pokemon Go Walker Automatic Usb Phone Swing Pedometer Device - Holders & Stands - AliExpress
Phone Shaker for Steps Counter Compatible for Pokemon Go Walker Swing USB /Rechargeable Pedometer Stand Earn Steps Automatic - AliExpress
Mcbazel Automatic Steps Earning Device for Pokemon GO/Walkr/Google Fit IOS Android Mobile Phone Steps Counter Black/White : Amazon.co.uk: Sports & Outdoors
If you're gonna use a smartwatch, always remember to first close the pogo app and don't open it until making sure that google fit has updated your steps from the watch app.
How to sync steps from an activity tracker to Pokèmon Go
Amazon.com: Phone Swing Step Counter Pedometer Compatible with Pokemon Go Poke Ball Plus Cellphone Accessories with USB Cable High Silent Version for Walking (Support 2 Phones Under 7.2 Inch) : Cell Phones