Reminder system offers flexibility in daily life activities and assists to be independent. The reminder system not only helps reminding daily life activities, but also serves to a great extent for the people who deal with health care issues. For example, a health supervisor who monitors people with different health related problems like people with disabilities or mild dementia. Traditional reminders which are based on a set of defined activities are not enough to address the necessity in a wider context. To make the reminder more flexible, the user s current activities or contexts are needed to be considered. To recognize user s current activity, different types of sensors can be used. These sensors are available in Smartphone which can assist in building a more contextual reminder system.