The days-since tool on this site does the arithmetic and forgets the date when you close the page.
Show another skips the line already on screen. Copy a line only if you want it in a chat. Nothing is saved.
Tool
A milestone can be private to the thread. It does not need a public post.
Try it here
Pick one that does not require a phone number or a public photo.
Press Show another.
On this page
The days-since tool on this site does the arithmetic and forgets the date when you close the page.
Show another skips the line already on screen. Copy a line only if you want it in a chat. Nothing is saved.
Keep going
Random chat
These pages are for random text chat. Private chat by username stays in the app.
The app
Friend chats and group messages are free. Locks, hidden chats, and the vault are for a phone that is not only yours. Optional random chat stays off until you turn it on.
Help
A few quick answers before your first chat. The app has its own screens after you claim an account.
No. They are prompts. Skip any that do not fit the two of you.
No. Copy a line into your friend chat only if you want to.