Do not buy the upgrade
Terrible customer service. No response after 2 emails sent, as the premium package you pay for does not make a difference. The features dont work, and the guided meditations are very limited, usually with only on speaker, and all can be found for free on YouTube. I suggest getting the free ZenTimer. No extra costs. A huge list of guided meditations. And great features for free.
AmcVancouver about
ZenFriend - Breathe & Meditate, v1.4.2