I can't find much info on the specifics of this on the site. I guess it will be iOS and macOS ? Does it sync via iCloud or is another server involved? If so, w

I can't find much info on the specifics of this on the site. I guess it will be iOS and macOS ? Does it sync via iCloud or is another server involved? If so, whose server? Does it support multiple currencies? Custom templates? Receipts?