Older Mac app and iPad app - can't download

I REALLY want to use Agenda on my mac computer, and my iPad. Unfortunately, both app stores will not let me download it because of my outdated system. Is there anyway around this? Also, is there like a way to use agenda in an internet browser instead of the mac computer app? That would be really helpful.

Both my mac computer and iPad are old. :confused:

Sorry, we only support reasonably recent OSes because Agenda makes use of quite new things. We can’t get it to work on older models.

There is no web app yet, and we are not currently working on one. Perhaps later, but we haven’t decided.