Only works with videos taken with iPhone – TruSloMo - Share slow motion video to Instagram, WhatsApp, WeChat. Supports 240fps and 120fps video from iPhone 5S, iPhone 6, iPhone 6+ Review

Paid $1.99 to upgrade in order to change the stopping point for slo-mo, only to find that the app was incompatible with videos not taken with an iPhone. What a waste.
Review by adchick402 on TruSloMo - Share slow motion video to Instagram, WhatsApp, WeChat. Supports 240fps and 120fps video from iPhone 5S, iPhone 6, iPhone 6+.