The Renpho Elis 1 Smart Scale has racked up over 54,000 five-star reviews on Amazon, and right now you can get it for under $20 thanks to October Prime Day. That’s a steal for a device that syncs with ...

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Once the scale and Weight Gurus app were synced up, it was simple to use and the results were consistent during the two-week testing period. A few times, I had issues uploading data to the app.