Gambling apps are between the line of legal and illegal. On one hand, the Indian laws are not strict enough to enforce regulations on them. While these apps could potentially prey on people's plight.
On paper, gambling apps are not illegal, especially games that are based on skills. Nagaland, Sikkim, and Kerela allow online gambling apps in their respective states however they are strictly regulated (only skill-based games are allowed) The apps must have licenses to operate in the said states. Telangana, Rajasthan, Uttar Pradesh, Andhra Pradesh, and Tamil Nadu have banned gambling apps in their territories expressively.
gambling apps like Dream 11 will never be found on Google Playstore because Google itself does not allow money-based contests.
ever since the rise of Jio, many young and impressionable people are in the initial stage of understanding the internet. Most of them don't understand the advantages and disadvantages of gambling apps because of their desperation to make money. The app companies would often use their desperation for profit.
Therefore in the absence of any legal procedures restricting the use of online gaming app, one must be cautious about it after venturing into it.