Sorry to be a bit harsh, I have no intention to offend you and I'm grateful for your effort as a blind guy. However, whatever your ideological inclinations are, if you want to make a solution accessible, ideally you need to test it with: JAWS and NVDA on windows, VoiceOver on iOS, TalkBack on Android, optionally Orca on Linux. Most of blind people do use Windows because it offers the most accessible experience on desktops, and for mobile platforms vary, but of course it's iOS and Android.

@menelion I’m not sure what would offend me about your response. The technical bit is detailed and helpful! Sadly, most of the small non-profit don’t have the time or funds for the level of work required for good accessibility so that’s what’s always challenging.

In this case, absolutely go Windows (NVDA at least, it's free and open-source), and at least one mobile platform, whatever you have, iOS or Android. that's a must.

@menelion okay cool will definitely advise! I so appreciate your advice.