Depending on where you choose to purchase your Lifesum premium subscription there are a few different options for paying without a credit card.
 
Website 
 
On our website via https://lifesum.com/upgrade you have the option to pay via Paypal. Paypal offers the option to make payments using a linked bank account.
 
App Store

In App Store, you have a couple of different options depending on where you are located. In some areas it is possible to pay via Paypal and in some areas you can pay via your mobile carrier. You can read more about what options exist in your country here: https://support.apple.com/en-us/111741 
 
Google Play Store

In GooglePlay, you have a couple of different options depending on where you are located. These options incluide direct carrier billing, PayPal, and Google Play credit. You can read more about the options here: https://support.google.com/googleplay/answer/4646404