To resolve the issue of Monefy not working on your iPhone XR (with iOS version 13.11.24), follow these steps:

Step 1: Close and Reopen the App
Sometimes, simply closing the app and reopening it can resolve minor glitches. To do this, swipe up from the bottom of the screen and pause in the middle to access the app switcher. Then swipe off the Monefy app to close it and reopen it from your home screen.

Step 2: Restart Your Device
A device restart can clear temporary issues. Press and hold the side button and either volume button until the power-off slider appears. Slide to power off, wait a few seconds, then turn your device back on by pressing the side button again.

Step 3: Check for Updates
Ensure that both your iOS and the Monefy app are up to date.

1. Go to Settings > General > Software Update and check if there’s a newer version of iOS available.
2. Open the App Store, tap on your profile icon at the top right, and scroll down to see if Monefy has an update available. If an update is available, tap Update next to Monefy.

Step 4: Delete and Redownload Monefy
If the above steps did not work, try deleting the app and reinstalling it.

1. Tap and hold the Monefy app icon until a menu appears.
2. Select Remove App > Delete App.
3. Open the App Store, search for Monefy, and tap the download button to reinstall it.

Step 5: Review App Settings
If Monefy is still not functioning properly, ensure there are no settings hindering its performance. Open Monefy, go to Menu > Settings, and check for any sync issues or account problems as outlined in the Monefy FAQ - learn more - learn more.

If after these steps the issue persists, consider reaching out to Monefy support for further assistance and troubleshooting specifically related to their app.