Secret letters: you can send them without revealing your identity.
Writing a letter without signing it has a charm that instant messaging has lost. Saying what you would never dare to say face-to-face, praising someone without embarrassment, scheduling a message to arrive exactly on the person's birthday—all of this is possible on a cell phone today.
But two very different things They are sold under the same name. One is the digital letter with scheduled delivery, which is romantic and relaxed. The other is the anonymous message via link, which is fun and has a history worth knowing before spreading your link around.
A letter arriving in the future.
You write it today and set a delivery date. It can be for someone else or for yourself, a year from now. It's the most beautiful format and the one with the least risk.
Anonymous message via link
You post a link on social media and receive messages without knowing who sent them. It's the viral format — and the one that requires the most attention to privacy settings.
Envelope, stamp and handwritten lettering.
Good apps mimic a paper letter: envelope animation, wax seal, and handwritten font. It's the detail that makes it seem like a gift, not a notification.
Anonymity works both ways.
If you don't know who wrote to you, then the writer also knows nothing about the person on the other side. This changes what is safe to share.
Why is sending without signing so tempting?
There's an explanation, and it's not just being fussy. Anonymity reduces social pressure: when there's no risk of immediate judgment, it's easier to be honest. That's why these apps have become a kind of digital confessional, where people say compliments they'd be ashamed to say in person and admit to passions they've held for years.
The same mechanism, however, is what makes the format delicate. Those who write without signing also feel less restraint in causing harm — and the history of this type of app includes serious episodes, including lawsuits from regulatory bodies and a ban on use by minors.
What separates a good app from a problematic one?
Control over who can write.
A decent app lets you filter, approve before appearing, and block senders. If it doesn't have that, don't install it.
Privacy policy that exists
It needs to be written down what is collected and what is done with the message. Without that, you are the product.
It does not promise to reveal the sender.
This is a classic scam in this category: charging for a signature to reveal who sent the request, and then not revealing it. It has already resulted in multimillion-dollar fines abroad.
Frequently Asked Questions
Generally, no — and the app that charges to reveal information is usually the one that doesn't reveal it. Some services only show the sender's identity when authorized by them.
Yes, it's one of the most common features. You write now and choose the date — from tomorrow to a few years in the future, depending on the service.
With care and supervision. One of the world's most popular apps has been banned from serving users under 18 after a lawsuit for marketing directed at children. The guide explains the case.
Yes, for reputable services. But encryption protects content in transit—it doesn't prevent the service itself from storing data about you.
The guide alongside differentiates between the two types, shows what to look for before installing, recounts the case that resulted in a multi-million dollar fine, and provides practical rules for using it without regretting it later.
Open the full guide