Thanks for all your advices. So far I think "EasyFast" could be my favorite. As "Pin" is used as verb to represent the action to publish a photo, so i'm hesitating to use another verb like 'Push', 'Tack', 'Stick', 'Peen'. They might be new to users.

EasyFast uses two adjectives. It's independent of what action is done, so we can avoid using "Pin". And I like the meaning of "Fast" to indicate "fasten"

This is so far the option i favor of. Thanks for all your help to think about this. And i'm open to new advices. I hope to get the perfect name, and if you guys can help trying the app and send comments (paul_yan@pinssible.com), i would appreciate.