I can't enter a reversed card in my journal.

There are 2 possible reasons why entering a reversed card isn't possible.

1. You're using a tarot deck that does not use reversals. If you're using a different tradition like Thoth or the Marseille, they do not traditionally use reversals, and we do not include them in our app. However, some readers read with reversals for those traditions regardless, though...I do not. Because the app requires that I personally include meanings for reversed cards, I'm not entirely comfortable yet including reversed meanings that I'm not familiar with. To learn more about tarot traditions, click here. If you'd like to include reversed cards in your readings, please use any of the following decks: Golden Thread Tarot, Seventh Sphere RWS, Luminous Spirit Tarot, Tarot of the Velvet Moon.
2. You've disabled reversals in your settings. Head to your profile or your tarot reading settings to enable reversals.

You can see which cards have the possibility of reversals when choosing your deck: