Alongside logo and web concepts I have also been involved in providing designs for various app projects:
Idea: Send and receive secure text and photo messages only between trusted and verified contacts. There would be 3 levels of security, depending on how long you wanted a message to be available before it expired and was deleted forever. The concept was inspired by 1970's sci-fi iconography.
Idea: Time and practice manager for music students. A music student would be able to time and track their practice sessions, a parent would then verify the practice took place. A companion app would allow that data to be looked at by the music teacher, who could see practice times and progress and in turn provide music to be learnt and reminders before the next lesson.
Idea: Send and receive secure text and photo messages that can only be unlocked via face recognition. This was designed to be a proof of concept for the technology.
Idea: Record the instant reaction to opening an unexpected image. The app would take a photo of your instant reaction to a sent photo or image. This reaction image would then be sent back to the original sender and also posted on a public website.