WhatsAbove

An app that shows the moon's phase and its position within the current ‘synodic cycle’.

It also has a zodiac chart that shows the astrological ‘sign’ or ‘house’ of the sun, moon, and the planets (i.e. their geocentric ecliptic longitude). Using the chart you can read off conjunctions, oppositions and other phenomena.

The free version restricts you to the current calendar month; a purchase is necessary to access others months and years.