Moodelizer lets you create customizable, professional-sounding background soundtracks for your iPhone videos. But the app is limited and occasionally buggy in its first release.
The Cortana app delivers highly personalized info, reminders, and general information, tying in well with Windows 10 PCs. She lacks some of Siri's hardware integration but sometimes gives better answers and provides a daily glance.
Premiere Clip is Adobe's mobile app companion to Premiere Pro, and it offers useful lighting adjustment features and clip joining, trimming, and splitting tools. Still, it lacks templates, a choice of transitions, and video rotation.
The Acorns app opens an investment account for you and automates micro contributions to help you get started. It's decent, but you might be better off going to a financial planner.