You want to get up just before sunrise.
An alarm clock app that wakes you up just before sunrise (based on your location and date.) You set up how much before sunrise you would like to wake up, and how many hours of sleep you need. The alarm will start alerting you to go to sleep based on that (you can also choose how long before going to sleep you want it to start “bugging” you.)
Help create the best “top list” on a given subject.
Create topic specific intelligent crawlers that go through the web and finds the “good stuff.” These are then are curated by experts in that topic to make the final top list.
I would like to see how much I read.
A feature in ebook readers that will show me how much I have read daily, weekly, etc., how much time (in hours) did it take me to read a particular book, and over how many days.
You come across an unknown stamp and want some information about it.
An app that takes a picture of the stamp identifies it and return relevant information about it (history, value, etc.)
You are planning on taking an active vacation by visiting a foreign city and touring its sights. How much will it cost per day?
An app that lets you choose a city, the activity level (how many museums, sites, etc. you would like to visit per day), eating habits (how many hot meals, etc.), and where will you stay (to calculate travel expenses), and gives you a from-to list of expense possibilities for each item.