PulseList reads the letters, screenshots and reminders already on your iPhone, puts the few things with a date on them on one list, and stays quiet about everything else.
Photograph a letter or hand over a screenshot. PulseList works out what it is asking of you, on the device.
Reminders and Calendar are read, never changed. Clearing something here leaves what is in Apple's own apps exactly as it was.
An event earns a place only when it asks something of you before it happens. Everything else it reads is left alone.
PulseList is in development. The privacy policy and terms of service are published here in advance.