These are basic requirements for a modern UI.

• Recordings should be scrollable, allowing users to review recordings in succession without having to return to the main listing
• Thumbnail images should be scalable to make them easier to see
• Activity zones should restrict recordings to action within those zones
• The built-in sensitivity should be able to distinguish between movement by people and movement by things like leafy tree branches 
• iPhone and iPad apps should be identical; activity zones can be set on an iPhone but not an iPad
• Removal of recordings should have the option to check multiple recordings for deletion in a single step
• There needs to be a desktop/laptop interface so that a mobile device isn't necessary when using a standard computer and so downloads can be made directly to a hard drive