Hi, I am about to graduate from C25K on my next run probably Saturday, as I am busy working travelling and staying over before that. My question is according to the App I have on my iphone5 (ARGUS) I ran 5.04Km in 30:05 minutes, that is nearly 1.5 k more than the last time I ran. It could be correct but seems a massive difference in 2 days. Love some advice on Apps, thinking of putting a running Watch on my xmas list but would like the best app until then, I don't even mind paying if its accurate. Got to say the wind was blowing behind me today but even so that's quick.