Science (195 programs)

Pros: Alert you by mail. Automatically place orders. Support for six Amazon sites.

Cons: Alert sound is terrible. Can only set watch by seconds or minutes. Random items sometimes appear.

Pros: Set sensitivity. Cat alerts.

Cons: Limited customization options.

Pros: Features more than 100 articles on Saturn.. Has over 500 images relating to the planet..

Cons: Certain features are only compatible with larger screens.. Some may find the Star Trek-inspired interface annoying..