What tyre inflator do you recommend?

I find the tyre inflators at service stations to be very unreliable. Often the tyre pressure inflated and recorded as correct pressure is wrong. Could you recommend a reliable tyre inflator I could buy, either a foot pump inflator or preferably an electric inflator, that I could use on a regular basis on both my cars?
The digital Ring RAC635 air compressor is good, we reviewed it here: kit.honestjohn.co.uk/reviews/review-ring-rac-635-d.../
Answered by Georgia Petrie on

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