From joshua waller:
ChronoSpan+ Event Countdown is a time span visualizer for iPhone/iPad/iPod. Simply enter any Past, or Future date (30,000B.C. to 30,000 A.D.) and ChronoSpan+ will compute the time span!!! This is the FREE version of ChronoSpan!!!Now you can try ChronoSpan before you buy!!!Fully functional FREE version is only limited by the number of active ChronoSpans you can have running (limited to 2x in FREE version).In-App Upgrade makes it very easy to remove ads and unlock full functionality (removes 2x ChronoSpan limitation).Countdown/Count Up ChronoSpan has many applications from simply entering a yearly repeating event, to visualizing how long it has really been since the pyramids were built. Simply enter a Target Date and Time, and ChronoSpan will always tell you the time span to the Target. Multiple Calendars Supported ChronoSpan doesn't stop there. Support for 5 Calendars (Gregorian, Buddhist, Hebrew, Islamic Civil, and Persian) per ChronoSpan allows you the freedom to use any Calendar you would like for each ChronoSpan you setup! Not only can you select different Calendars, but ChronoSpan automatically converts Target Dates for you to the new Calendar. Ancient Dates Not only can you visualize how long it is until your next birthday, but ChronoSpan allows you to enter any (30,000 B.C.) past date as well. Features - standard Countdown to a Target Date (day, month, year), Count Up from Past Targets - enter ANY date from 30,000B.C. to 30,000 A.D. and see how long it is from that Target Date! - Multiple Calendar Support (Gregorian, Buddhist, Hebrew, Islamic Civil and Persian) - 8 Themes allow you to customize the look of ChronoSpan - 30 Custom Alert Tones for your listening pleasure - Repeat Alert allows you to Repeat your spans Daily, Weekly, Monthly or Yearly (No Repeat also available) - Custom Date Picker allows easy entry of dates(day, month, year) spanning 60K years - Day Only Mode, no years or months, only Days - Add Span defaults allow you to specify any defaults you would like when adding new spans. - Share allows you to send the remaining/elapsed time to a friend via Email with one tap!!! - Over 30 ChronoSpan Presets make entering common Target Dates easier than ever. Requirements iPhone/iPad/iPod Touch running iOS 4.0+ Required NOTE: iOS 5 Local Notifications are now controlled in the Settings -> Notifications area of your device and must be configured by the user. Once a date is entered, ChronoSpan never stops counting unless you stop it. No matter what point in time you are looking for, ChronoSpan will help you find it. Hope you enjoy!