[Android] aCalendar+ Calendar & Tasks $2.49 (44% off) @ Google Play

This highly rated (4.7 / 5, 21,576 reviews) calendar and tasks app is on sale again. Not quite as good as when it was App of the Week ($0.20!), but another chance to get it and feel warm and fuzzy knowing that part of your purchase goes to protecting the endangered Mountain Tapir.

(NB: Not sure why the icon on the site says 50% sale.)

Partial Description:

aCalendar+ is the premium version of aCalendar - please try the free calendar app aCalendar first!

aCalendar+ gives you many additional calendar features and your purchase supports further development and helps protecting the endangered Mountain Tapir.

EXTRA FEATURES (aCalendar+ or as In-App-Purchase)
● Public holidays (and school holidays for some countries)
● Color themes (UI and Widget colors, dark background - NOT event colors: those are defined by your calendar service)
● Business features (Invite attendees, link contacts, free/busy, private, profiles, share as ICS, …)
● Tasks (manage Google Tasks or tasks from CalDAV/OpenTasks)
● No ads (removes the occasional advertisement)
♥ Tapir Apps donates 10% of all revenue (app purchase, IAP, ads) to rainforest conservation through our friends at World Land Trust