Ive found out how to do the temperature corrector now. If you go to Fertility Friend, in the menu column on the left hand side, go to data and click on 'temperature corrector'. From there you can put it what the temp was and at what time and FF will predict what the actual temp would have been. Hope that makes sense. If you do that Id write down what the original temps were on each day so you can change them back if you want to.