SMS credits are the balance you use to send text messages from your private virtual number in Calculator Pro+. You only pay for what you send — no contract, no monthly fee. This guide walks you through enabling messaging and topping up your credits in just a few minutes.

Before You Start

To buy and use SMS credits, you first need to enable free messaging and verify your phone number. If you’ve already done this, skip straight to Step 2 below.

Step 1: Enable Free Messaging

1. Open Calculator Pro+.
2. Go to settings.
3. Click on “Enable Free Messaging”.
4. Enter your phone number and verify it with the code you receive.

Once verified, free messaging is active and you’re ready to add credits.

Step 2: Buy SMS Credits

1. Open Calculator Pro+.
2. Click on top-right corner “Pro” button as it display in below screenshot.

4. Click on “TOP-UP BALANCE” and complete payment procedure.