When comparing Locale vs IFTTT, the Slant community recommends IFTTT for most people. In the question“What are the best Android apps for making your phone automatically perform certain actions based on set criteria?” IFTTT is ranked 2nd while Locale is ranked 9th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro No noticeable effect on battery life
Even with Locale's advanced functionality, users have reported no noticeable effect on battery life.
Pro Uses Google data backup API
All the "situations" used on Locale are saved using Google data backup API, so once the variables are right, they will never be lost.
Pro Balances ease of use and complexity
This app is complex, but the UI makes it easy for anyone to use without much of a learning curve.
Pro Optimized for low battery drain
Pro Uses WiFi to determine location
Instead of using GPS like other apps, Locale uses WiFi to determine a user's location when possible. This is one of the reasons that Locale is so efficient when it comes to battery life.
Pro Free
Pro Extremely simple
While this app can complete complex tasks, it is very easy to use.
Cons
Con Recipes aren't guaranteed to work
Sometimes recipes don't work as expected, or fail to launch completely.
Con Limits only one action per trigger
Instead of allowing users to have a large amount of actions launch based off of one trigger, the limit is only 1:1.