khal vs Rainlendar
When comparing khal vs Rainlendar, the Slant community recommends Rainlendar for most people. In the question“What are the best calendar apps for UNIX-like systems?” Rainlendar is ranked 10th while khal is ranked 14th. The most important reason people chose Rainlendar is:
Your calendar data doesn't need to be stored with your computer. Data can be retrieved from Google, RTM, and even Outlook. (With the pro version removing annoying unregistered marks)
Specs
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Pros
Pro Integration
Your calendar data doesn't need to be stored with your computer. Data can be retrieved from Google, RTM, and even Outlook. (With the pro version removing annoying unregistered marks)
Pro Blends in with the desktop
This calendar stays out of your way, while remaining readily available to tell you what's coming up.
The Shadow skin make it look like a wallpaper calendar, but has the benefit of being interactive.
Pro Customizable
Take control of your calendar by scripting new functionality, take skins already created, or just disable all the fluff.
Rainlendar provides a platform to present your data in the way you desire.
Cons
Con Can be unstable
The calendar crashes from time to time when entering new data.