Yes you can go gambling online without having to make a deposit. The offers come from no deposit site where you can collect the bonus and never make a purchase. Many people search the web for the free gambling offers and have little success and the reason is a lot of casinos are changing up promotions to not offer the no deposit bonus. Since they have different platforms and they do not all work the same they can not give money away on mobile like they do when you just play on your computer.
So it gets a bit confusing for players which results in complaints as they feel they should get treated the same no matter which way the pick to play. This is understandable and honestly I do not know if they are unable or just unwilling on mobile. It could be that mobile version pay out better so it is more of a risk, not exactly sure. However if you want the no deposit gambling bonus just claim it on your computer as you can always move to mobile later since your account information will transfer over.
After you have located the casino you are going to play at then getting the money is easy. You install the casino software and log on, once your in there you will have credits in your account whether they are free spins on a slot game (just go to that machine to activate them) or if you picked a free play casino you will see a button to activate. Credits well that you should see in your account balance. Just follow the rules on the bonuses and you will have a hassle free experience when you cash out your wins. If not then it might be unpleasant or stressful when you want to withdraw funds. Never make up any information on your sign up form as you will never to scan copies to prove the information you have provided is correct. Failure to provide proper documents will result in cash out being cancelled. In other words just be honest and only sign up once, this includes family members they are not allowed to claim the same no deposit bonuses as you do. Only one person may play at a casino without a household. If more than one person wants to play they need to pick a different casino.