Sometimes, when a user opens an out-of-date version of the Roblox Mobile App on an iOS device, they receive a notice that pushes them to the App Store to update the app. However, on the Roblox App Store page, the option to Open the app is available. When a user taps the Open button, they receive the message to update the app.
How to Resolve
To resolve this issue, simply go through the following steps:
Clear the App Store cache by tapping a total of 10 times on one of the navigation icons (e.g. Featured, Categories, Top Charts, etc.) at the bottom, ensuring the same icon is tapped each time.
Next, force-close the App Store and then restart it. From there, it is recommended you update directly from the App Store.
To prevent your app from being out-of-date in the future, you can set iOS to automatically update apps so that new versions of the Roblox Mobile App are automatically downloaded when they are available.
Additional Help