Pulse/ calorie monitors?

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Anybody out there use a sports tracker that they would recommend? I've been shopping around for a pulse monitors that will automatically log my calorie into an app (like Endomondo) but the reviews I've been reading have not been too encouraging. Looked at the Mio Active and the reviews say it's not very accurate, the Sportline 1060 seems to get too much interference from other devices and the polar FT4 and FT7 products have good features but dont seem to hook up with any apps. The Scosche arm band looks promising but I couldn't find a review on it. Any suggestions?