1. Open the app.
2. Tap on the camera button. This will open the camera. You will see three options above the red circle: single, multiple and 2-sided.
3. Tap on the 2-sided option to choose it. Then tap the red circle in order to snap the first side of your receipt. Then tap a second time to snap the back side of the receipt. Be sure your photo is in focus and avoid capturing other stuff in the photo beside your receipt.
3.1 Another way to do this is to tap on the More button in the top right corner of your home screen. Then choose the Two-sided Expense option (or Double Sided Expense on Android).
4. Tap the blue tick button on the left to submit the photo for processing.
That's it! All you need to do next is wait for the receipt to be processed. After that, you can see your receipt in the Recent tab. Last 10 snaps you have taken are stored there. Under the All tab, you are able to see all the receipts you have in the app.
If you accidentally chose the 2-sided camera mode, but you have a single-side receipt to snap, don't worry, just tap on the blue tick button to submit your receipt after the first snap and it will get upload.