Question: must have iwatch 4 apps?
Answer: 1Password. 'Less is more' when it comes to wearable apps, and this stripped-back version of 1Password's mighty iPhone app is a good example. ... 
Calcbot. ... 
Camera Plus. ... 
CARROT Fit. ... 
CARROT Weather. ... 
Citymapper. ... 
Dark Sky. ... 
Evernote.