Charts contain over 25 000 stars to magnitude 7.5 and 346 deep sky objects including all Messier objects. Almost all objects have visual magnitude 10 or brighter. There is also a list of over 150 double stars.
Select a constellation, a deep sky object or a double star from the list or select a chart from an index map. You can scroll around the chart and mirror or rotate it. You can zoom in and out by pinching. You can also zoom in by double-tap and zoom out by two-finger tap
The sky is divided into 18 charts. One chart covers about 4h x 50° (polar areas: 8h x 40°). Projection is equidistant azimuthal projection.
Stars have Bayer designation (Greek letters) or Flamsteed numbers to magnitude 6.0, except some crowded places.