Hey,

Salary is the fixed amount of money that is paid to employee by employer in return of the work done.Salary is generally one-twelth of annual package which is being at fixed interval,

that is every month.

In simple words, your annual package consists of  monthly salary.

Hi Hrsh, please mention the question more clearly. The question has a lot of ambuigity. Generally app developers are very tough to get and they require a nice amount of experience and skills in the required subjects. The package can start from as low as 3-4 lkh p.a and can go higher and higher as per the experience and skills showcased. If you have any firther doubts please mention the doubt with more clarity in comment section so that i could help you out.