It’s unacceptable that you can’t use the app if there’s an update. So if I’m in a rush and can’t use it until I update, I just miss my train because I can’t get in until update is done? I have never seen that with any other app ever in the 12ish years that I’ve been using an iPhone.*update* I received this reply from the developer:“Sorry for this unavoidable inconvenience—we definitely don’t like to force an update to occur, but it has been necessary both in retiring the old app (which is no longer supported by its makers after several weeks of transition), and sometimes in updating to a new version for security and/or stability reasons. Though we, like others, do plan to keep this very rare, it’s occasionally necessary require an update sometimes in apps like this or a banking app, where you can manage money stored in an account, to ensure stability and/or account security."I did not have the old app, I had already upgraded to the new app and this still happened. I also don’t believe I have ever been forced to update to use an app. An email or notification should have proceeded this forced update so we users/customers could have updated when convenient instead of being surprised and caught off guard. This reply does not convince me to change my review.