Not really sure, and maybe being an older person (47) i really find apps awkward and confusing, plus i don't want to run the risk of using any excess data. My vice was pokies and playing online on the desktop. It may be just me, but despite a plethora of gambling ads with bookmakers and even online ones saying ;use our app' as such, i've never had the inclination to use my smart phone to do this.
Strange, but it might be just being conditioned to sitting down, like at a poker machine, and being on the desktop replicates that.
Insofar as trying to delete the apps and avoiding the incredible saturation coverage of ads that tell you to use our apps and such, not really sure. But others on here may know more than me. What it does show is that gambling comes in all manner of ways, and each way can be a vice to many people. It's all the same in one sense, getting us to part with our money. That's something we're all now endeavouring to cease doing. Good luck with that anyway JColin.