A new update for Google Wallet is rolling out that will let you add money to your Wallet balance automatically. You will also be able to set up low balance alerts. The update also brings Google's new material design to Wallet.
If you're constantly worried about running low in your Wallet balance, worry no more. The latest version of Wallet lets you set up recurring bank transfers. You can select the recurring amount, as well as the schedule for the transfer, weekly, bi-weekly, or monthly. You can cancel these transfers at any time.
You can also set up low balance alerts. When you reach a certain low threshold in your balance, Wallet will alert you so you can add money. On the Wallet Balance screen, tap Low Balance alert to set it up.
You should be able to download the Google Wallet update soon from the Google Play Store.