Hi there,
I didn’t get a notification for this for some reason, so I’m just seeing your review now.
Usually, IA reports more data than GA, so it is unusual to see fewer visitors in IA. With that said, there are a few reasons why this could happen.
First, make sure that the site’s cache was cleared after installing Independent Analytics, including your CDN’s cache if you’re using one. Otherwise, some visitors could be seeing cached versions of your page from before IA’s tracking script was added.
Next, make sure that Google Analytics hasn’t been installed twice. This can happen if multiple plugins add it and will lead to over-counting.
Another thing to check is that the timezone in your General Settings and in Google Analytics are the same. If they’re different, this could cause IA to report visits on a different day, leading the data to look different.
If the visitors are leaving really quickly, they might not get counted by IA. For instance, if they land on the page and leave in 1-2 seconds, GA might capture these visits, but IA most likely will not since it is loaded last.
Otherwise, make sure you’re comparing the same type of metrics. For instance, make sure you’re looking at Visitors vs. Unique Visitors for a fair comparison.
Let me know if you think any of these solutions apply to your site.