Happify, which offers an online service that assesses users’ happiness levels, has raised $5 million in funding via a convertible note. Mangrove Capital Partners and Bridge Builder Collaborative led the round, according to a VentureBeat report.

The service uses both subjective and existing objective evaluations, based on the science of positive psychology, neuroscience, and behavioral health – guiding users through a set of programs and games that push them toward healthier mindsets. Happify says its service doesn’t coach users on how to change the facts of their lives, but rather how to look at those facts through a different, more positive lens. They call this “emotional fitness.”

The company has recently passed the 1.2 million user mark, with its iOS app consistently ranking among the Top 10 grossing apps and one of the Top 10 most downloaded free app in the health and fitness category. The Android app has just launched.

Going forward, Happify will try to integrate data gathered by physical sensors found in modern wearable devices into its online service. The idea is to make sense of additional information and see how (or whether) it affects one’s happiness.

The company was founded in October 2013 by two casual gaming entrepreneurs – Ofer Leidner (president) and Tomer Ben-Kiki (CEO).