I bought Stelo 4 times and Lingo 4 times, by far Lingo is the most accurate than Stelo. A few days ago I used newly purchased Stelo and after 24 hours to I compared it with Keto-moto finger test, to my surprise it was the worst reading I have ever seen compared to my last Stelo sensor. The result of keto-mojo blood test and Stelo one hour after breakfast Stelo was 180 and Keto-moto finger test measured 130, off by 50 points. Do not buy Stelo, buy Lingo, I compared it several times before with Keto and it was only off by 10-15% as it was advertised.
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