You can only download a transaction receipt via the website platform for now. However, you can view your transaction details on the mobile app.
To download your transaction receipt on the website, follow these steps;
Sign in to your account.
Click "transactions" on the sidebar menu on the home page to see your transactions.
Click on the transaction you want to get a receipt for.
Click on "download receipt."
Your transaction receipt will be downloaded and saved to your device.