Yes, online gambling apps or casino apps can be used in India without fear of legal prosecution. Offshore casino apps are NOT ILLEGAL in India, barring a few states.
Gambling in India is regulated by the Public Gambling Act of 1867. But this law does not prohibit the use of casino apps (or even online casinos, for that matter). Therefore, it is NOT illegal to gamble or play on casino apps in India.
What’s more is that state governments in India usually decide for themselves whether to make online gambling legal or illegal for the state in question.
Apart from a handful of states in India, most have allowed the use of online casinos and casino apps as long as they are regulated by offshore entities. This allows Indian players to freely use casino apps without fear of breaking the law.
In accordance with the Foreign Exchange Management Act or FEMA, all casino apps recommended by My Online Casinos accept payments in Indian Rupees. So we can say that casino apps are completely legal and safe for Indian players to use.