From Spotlight Six Software:
You will be tracking your billable hours within minutes of installing Timeclock for Android. Track hours for as many clients as you wish. Set your hourly rate for each client and Timeclock will calculate your earnings. Round your work times by specifying an optional billing increment for each client - from one minute up to one hour. Track your time as you are working or specify the start and end times explicitly. View and edit all time records within the app. You can go back and change the start and end times, billing rate, notes any field can be edited. Export data via a custom .csv report. You pick which data columns are exported, the order of the columns and the type of summary information. This makes it easy to import the data into your spreadsheets or other applications. View and export time records by day, week, month or custom time filter. Each time record stores client, notes and a secondary data field that defaults to "location", but you can change this to whatever suits your business: project, case, and category.