It's been a long time, so seems I got the reason a bit wrong when I looked into it properly now. It seems I could have avoided it by improving any small bit: "

It's been a long time, so seems I got the reason a bit wrong when I looked into it properly now. It seems I could have avoided it by improving any small bit: "We noticed that your app has not been updated in a significant amount of time... To keep your app on the App Store, submit an updated version for review and make sure it follows the latest App Review Guidelines. If you are unable to submit an update within 30 days, your app will be removed from the App Store until you submit an update and it is approved."