Hello bhukya

Can you please elaborate your question so that i can provide you some asistance. From the given question I can not interpert anything. Please comment below with some more information. If you mention the type of qualification you have pursued and the programming languages you have learned then I can provide you some assistance..

Dear Aspirant 

Happy to see your keen to do something in field of technology. You can become an app developer by learning course based on app development for android, ios etc. For this it is very important that you admit yourself in  a technical field, that can be graduation degree like b.Tech or bca, as it can provide you a platform from where app development become easier for you.start Learning  app development from computer institute in your city or there are many instances when college arrange such learning opportunity as lectures or workshops and then carry it to a next level by self study. You also use various online tutorials video on YouTube and many known websites.Hope you become an app developer in future. 

Good luck for your future!

Feel free to ask if you have any further queries.