If you can get into one of the tier-1 incubators, then it's almost certainly a good idea if you're building a consumer app. For the lower-tier accelerators, however, it might just be a waste of time and equity.
Just as an incubator can offer great assistance to a startup, it can also be a hindrance or waste of time and resources. Pick your incubator like you pick your cofounder. If you can't find the right match, then be prepared to go it alone. It's better than making a poor choice.