Planet Counter (top left corner on screen snap #2) is a 2x2 home screen widget that monitors the count of current confirmed exosolar planets as published by NASA/JPL's Planetquest website. The total count on other sites may be higher as it includes unconfirmed planets as well.
The widget includes a NASA/JPL planet illustration which can be enlarged by tapping on it. Tap again to reduce (see screen snap #3).
Considering that new planets are not confirmed every day, the widget updates itself every 24 hours in that it won't drain your battery.
After installation, a splash comes up with instructions and an About button. Please appreciate that widgets cannot be moved to external memory card.
Some comments complain about low update frequency. Please appreciate that astronomers do not confirm planets every day! It may take weeks, occasionally months, until a next update, unless planet hunters are blessed with unusual luck.
This widget is FREE and WITHOUT ads. Please consider a small donation via PayPal to robert(at)requio.com, if you find it useful for your hobby or just for curiosity.
Keywords: widget, astronomy, exosolar planets, exoplanets