It seems that teslaspy reports higher consumption for the trip than the car itself, by a lot
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And reports that estimated miles are way lower than rated. At 80% charge on my S85 it reports about 80 miles less
consumption is calculated indirectly, as the api doesn't give this information. TeslaSpy will estimate the initial kWh that remains in your battery for a drive, taking as a reference the max estimated range with the battery at his max level. It will help if teslaspy has data for a charge at 100%, I don't know if you ever charged at 100% using teslaspy? For my car usually there's no a difference bigger than 3-5%.
But after reading your comment, I've just implemented a way the user can report a real consumption for a drive, this way TeslaSpy will be able to learn to adjust the estimated consumption to the real one. This feature will be also implemented into the app (iOS and Android) as soon as I can. See attached