The present invention provides a method for monitoring use of an absorbent product, such as an incontinence pad or a diaper, worn by a wearer. The method comprises the steps of registering (S4) a movement of the wearer by means of a mobile device (1) comprising a movement sensing device (2), evaluating (S5) whether the registered movement is indicative of urinary and/or faecal voiding by the wearer, and providing (S6) product-related information to the wearer or a caregiver of the wearer based on said evaluation. In this way, the product-wearer or his caregiver can be provided with valuable information related to the use of the product, for example recommendations on when to change the product, displayed on the mobile device or a mobile device of the caregiver.