iphone-track.com is the cheapest automatic tracking software you can find at less than $5/Month when you purchase a full year.
No downloads, nothing to install, only need Apple Id and Password for device
Access to the physical device not required, no jailbreak required
Works only on iOS Devices and Mac OSX
You can perform Real-Time Tracking on an interactive map.
You can Perform Scheduled Tracking and review the data later.
Review raw historical results over a time period on an interactive map.
Review processed historical results to show important points over a time period on an interactive map.
Review processed data that shows just the locations visited as well as the durations on an interactive map.
Review processed data that shows a list of locations visited as well as the durations.
View SMS/iMessage contents
View calls and durations
View all calls and texts
Organized as a single list
Organized based on Contact
Ability to select contacts to include in a single list
Ability to filter based on time
Ability to also include processed location data
As features are added, existing customers will not have to pay anything extra as long as they stay paid customers.