Opening other apps – VeryFitPro Review

While I like tracking my steps with this, if I’m on Instagram and want to open an ad, like Amazon, it opens to this app. Can anyone explain this? I’ve tried going thru Instagram and Very Fit settings to no avail and it’s getting really annoying. I’ve deleted this app and reinstalled but nothing fixes this.?
Review by 5ruffz on VeryFitPro.