How to get a Hebrew calendar on an iPhone?

I’d like to add a Hebrew calander to my iPhone. I’d like it to be integrated into my calendar app and (more importantly for me) to show up on my lock screen. If it also integrated Shabbat and chag times that would also be great. I know there are a bunch of apps, but I don’t know what to use, so any help would be much appreciated! And while I use an iPhone, tips and tricks for androids would I’m sure also be appreciated by many