Bests & Worsts Reviews from Amazon

Every time I've tried to update the app it refuses to even show an update button. Pretty much I have to go to their website in my phone's web browser and download it from their to update. I don't understand why it's so hard to fix this issue so you can update it without searching all over the internet for an update. Most people either wouldn't even try or there could be people accidentally downloading viruses when they think they're getting an update to this app.