For accessing all the features and services as offered on the TD Ameritrade platform, one must go through the Ameritrade login process. Whether you are using the application version or the web-based version it is important that you are able to access your account. However, what if you are not able to use the application of TD Ameritrade on your mobile? Well, you should not worry much about this as we are going to discuss different ways through which you can start using this investment application once again. Ways to fix the issue Here are a few things you can try to get rid of the TD Ameritrade app not working issue: Way 1- Clearing the app's data and cache might help Open the "Settings" of your device Now, go to the "Apps" section From the available application, choose "Ameritrade login" Then, click on the "Storage" button And, choose "Clear cache" for this app Next up, you should restart your device Else, choose the "Clear data" option Way 2- Re-install the application On Android: First of all, open the "Settings" and choose "Apps" From the list, choose "TD Ameritrade" Select the "Uninstall" option Now, search for "TD Ameritrade" on Google Play And, install the application Then, complete the TD Ameritrade login process On iOS: Locate the TD Ameritrade app icon on your iPhone Now, long tap it until it shakes Then, select the "X" option Choose "Delete" to confirm your action Now, go to the App Store to install "TD Ameritrade" Click on the "Get" option Way 3- change app storage location Open the "Settings" and choose "Apps" Now, locate and select the "TD Ameritrade" option Tap on the "Storage" option present under it Select the "Change" option to proceed Then, choose "Internal shared storage" Conclusion: After trying the ways given here, you should restart your device and carry out the TD Ameritrade login process once again and see if you are able to use the app or not. If not, then the only option you are left with is to use the web-based version of TD Ameritrade.