Left: illness 疒 (An ice 冫cold building 广 makes sick.), below: (Chinese only) transport 俞 (Cut something off the body 月/肉 with the knife 刂, put a lid on and ready for the transport.), heart 心
Mnemonic
By the ambulance (= The sick person's transport) the heart was cured.
The app has many other functions, such as character selection according to difficulty, practice programs, handwriting recognition and success statistics!