Like physical mail, the delivery time of your letters in Slowly is influenced by geographic locations and the distance between you and your pen friends.
You can check the distance and estimated delivery time by visiting the user's profile before sending your letter:
- Go to in the bottom menu
- Tap on the friend's name
- Tap your friend's avatar icon to enter the profile
- Look for About
- You will get the distance between you and your friend and the estimated delivery time