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$1. they have a great app directory with multiple different sections including apps specifically made for the blind, and an accessibility rating system.
They also have a blog and podcast talking about the newest important apps and app updates, and awards each year for the best ones.
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Off the top of my head I'd say Braille Tutor, Braille Sonar Pro, MBraille, Seeing Assistant Home, Be My Eyes, Dolphin EasyReader, Bard Mobile, Voice Dream Scanner (better OCR than seeing AI), Voice Dream Reader (for better reading voices) and many other apps that you may not even expect would be accessible, like 3M cloud library, Overdrive, yellowpages, kindle, and audible.
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I didn't include any navigation apps because those don't work that well on Ipads since they aren't as portable, and I didn't mention any magnifiers because I'm not low vision so if you want something more than the IOS built in magnifier you should probably ask someone who is.
I also didn't include any games, but their are many.
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I hope this helps...