Unable to use the app – OptumRx Review

I am a retired disabled senior living on Social Security and have been using this app for some time without problems. The recent update has informed me that I need to update my iPad OS to use the system to get my much needed medications. The App Store is unable to update my iPad because it is an older version. I do not have the funds to buy the newer version of iPad and this is upsetting. Why can’t OptumRx allow users who have older versions continue their use?
Review by swchlife on OptumRx.