MeetEffects

You can use the application both to edit images in a simple and professional way. This version contains about 60 effects while the Pro version contains more than 140 effects.
You can buy in the Play store the professional version or, if at least 20 people will use your promo code at the time of the log-in, (which you'll be given after registration) you will get free and automatically the pro version.
In a very simple way you can apply one or more effects at once, at any time, uncheck one of these by obtaining the desired result without having to delete or restart the work.