Android:
- Open Settings.
- Select Apps or Apps & Notifications.
- Choose the app.
- Tap Storage or Storage & Cache.
- Hit Clear Cache.
- To clear all app data, select Clear Data (be cautious).
- Confirm the action.
- Open Settings.
- Tap General.
- Select iPhone Storage or iPad Storage.
- Choose the app.
- Tap Delete App to clear data.
- You can then reinstall the app from the App Store.