In March 2016, Mr Pang Teck Chye's father would go missing for hours at a time from his Choa Chu Kang home.
On one occasion, the elderly man ended up in Bedok with no recollection of how he got there.
On another, his family could not find him for 32 hours. They steeled themselves for the worst.
It was only after a visit to the doctor that Mr Pang, 61, learnt that his 89-year-old father had dementia.
"At first, we didn't know anything about dementia," said Mr Pang, who works as a newspaper delivery man. "We didn't know how to take care of him. It was very stressful."
Yesterday, Senior Minister of State for Health Amy Khor launched a new app that is intended as a one-stop resource for caregivers such as Mr Pang to learn more about dementia.
The Dementia Friends app also allows people to sign up as "dementia friends" who can be notified to keep a lookout for missing seniors with dementia.
It was jointly developed by the Agency for Integrated Care (AIC), Nanyang Polytechnic and the Integrated Health Information Systems, which runs the information technology systems of all public healthcare institutions here.
AIC chief executive Jason Cheah said: "The new app makes it more convenient for caregivers searching for resources, and provides support as a one-stop platform for information any time, anywhere."
The app was launched at a seminar organised by charity group Brahm Centre to raise awareness of mental well-being, especially among working adults. The seminar topics included managing workplace stress and practising mindfulness as a means of reducing stress.
Dr Khor said: "Between our busy work schedules and caring for our loved ones, we may sacrifice rest and neglect our own mental health."
She added that it is important for people to practise good self-care and recognise if they have symptoms of common mental health issues, such as burnout, depression and anxiety. "If (symptoms are) present, it is crucial to seek help early, talk to a trusted friend, find ways to cope and build up our mental resilience," she said.
Mr Pang said that taking care of his father has become much less challenging for him and two of his siblings now that they are more familiar with his condition.
They take turns to take care of their father at home and he now attends a daycare centre on weekdays.
They are also used to his habits and quirks, and have a better understanding of his needs.
"Things are more stable now," said Mr Pang. "We understand how to deal with his condition."