StarBind starts with the chart behind the reading. Enter your birth details to see the full natal wheel, planetary positions, aspects and house placements, then follow the transits touching that chart each day. The Android app also compares two charts for relationship synastry, including romantic and friendship connections. You can switch among Placidus, Whole Sign, Koch and Porphyry houses. When the birth time is unknown, StarBind marks the chart as uncertain and leaves out houses and the Ascendant.
The app's chart, Big Three and daily transits are free. More readings are offered through optional subscriptions. On the website, free birth-chart, Moon sign and rising sign calculators work in the browser without an account. A downloadable natal-chart PDF can be bought separately, without an app subscription. The app is currently available for Android; the site says iOS is coming soon.
