This app is a very good replacement for real firecrackers. You have the choice wether your choiced firecracker should explode after one, five, ten or thirty seconds. Together with a bluetooth speaker or a bigger sound system, the samples have a better quality and you are able to shock people ;)
It is also cool that you can ignite several firecrackers at the same time.
Now the huge fun of New Year's Eve can come and you can ignite firecrackers all the year long, which you couldn´t even buy at New Year's Eve and they are much more environmentally friendly.