Pocket Informant

Personal Organizer & Calendar App, with Tasks & Projects, Notes and Contacts, all in one location! Beautifully designed with you in mind, Informant brings ease-of-use and extreme functionality to your busy life.

Calendar:
Choose from several built-in views, including: Month, Week, Multi-Day, Day, and more
Adjustable Multi-Day view lets you select how many days to show, from 1-7
Natural Language Entry - type everyday phrases such as “lunch with Jim at 12:00 tomorrow” and Informant will understand and create the event accordingly
Attach contact info or a written note
Support for ICS attachments
Printing (requires Android 4.4 or above)
Use the built-in TravelAssist™ to help manage event timezones while traveling
Weather integrated into the calendar views (in-app purchase)
Locations
Much More!

Tasks:
See your Tasks on your calendar
Checklists for tasks containing lists of items such as groceries or packing
Natural Language Entry
Parent/Child tasks
Group Parent/Child tasks in calendar view
Attach contact info or a written note
User-Defined Smart Groups
Much More!

Notes:
Text Notes
Voice Notes

Contacts:
Accesses the Contacts from your device
Attach Contact information to an event or task
Send ICS attachments to Contacts
More!

Sync:
Informant Sync (requires subscription of $24.99/year)
Google Calendar
Google Tasks
Evernote
Dropbox Backup
Toodledo