If you’ve searched for an alternative to social media that still involves writing to other people, you’ve probably come across Slowly and Lettre before landing here. All three exist for a similar reason: instant messaging made conversation cheap, and something got lost along the way. But the three apps solve that problem in genuinely different ways, and the right one depends less on which is “best” and more on what kind of correspondence you actually want.
What they have in common
All three move away from real-time chat. None of them show a “seen” or “typing” indicator. All three hide your real name behind a nickname or alias, so you’re writing to a person, not a profile. And all three are built around the idea that a slower pace produces better, more honest writing than a chat window ever could.
That’s roughly where the similarities end.
Slowly: pen pals matched by interest, with simulated delivery times
Slowly is the most established of the three, built as a mobile app where you’re matched with pen pals based on shared interests and languages, not at random. Letters are delivered with an artificial delay based on the geographic distance between you and your match — a letter to someone nearby might arrive in hours, while one to the other side of the world can take days. You keep pen pals long-term, build up a collection of digital stamps, and can run several correspondences at once from the start, even on the free tier. A paid tier, Slowly Plus, raises the limits on how many pen pals and topics you can have active and unlocks extra filtering options.
Slowly works well if what you want is an ongoing, evolving friendship with someone who shares your interests, sustained over months or years, with the app itself receding into the background once the relationship is established.
Lettre: handwritten letters and digital stationery, built for iPad
Lettre takes the letter-writing idea in a more tactile direction. It’s built around actual handwriting, with full support for the Apple Pencil, digital stationery, and collectible stamps designed by independent artists. You can write to other Lettre users, post a letter to a public “PenPals” feed for others to discover, or send a letter to anyone’s regular email address, whether or not they use the app. It leans toward the crafted, decorative side of letter writing: the object of the letter matters as much as what’s written in it.
Lettre works well if the physical, artistic feel of a handwritten letter is part of what you’re after, and if you want more control over who you write to, rather than being matched automatically.
One Reader: one letter, one stranger, then it’s over
One Reader takes a narrower, more deliberate approach than either. There’s no browsing, no filtering by interest, no building a collection of pen pals over time. You write a letter to someone you don’t know, entirely by email, under a name created only for that single exchange. If they reply, a correspondence begins. If thirty days pass with no reply from either side, or if either person chooses to end it, the conversation closes permanently. There’s no reopening it, and no way for that person to reach you again once it’s over.
The free tier, Reader, lets you start one such conversation; after that, replying to whoever writes to you stays unlimited, but starting a new one requires the paid tier, Writer, which allows a new conversation every day.
One Reader isn’t built for an ongoing friendship, and it isn’t built for decoration. It’s built for the specific, smaller experience of writing something real to a stranger who owes you nothing, without either of you carrying a shared history into the next letter — or ever needing to.
Which one fits you
| Slowly | Lettre | One Reader | |
|---|---|---|---|
| Matching | By shared interests/language | Manual, or public feed | Random, rotates among users |
| Format | App-based letters | Handwritten, app-based | Plain email |
| Identity | Nickname, kept over time | Nickname, kept over time | New alias per conversation |
| Relationship | Long-term, ongoing | Long-term, ongoing | Ends permanently after 30 days of silence |
| Free tier | Unlimited letters, multiple pen pals | Free with optional extras | One conversation you can start; unlimited replies |
| Best for | Building a lasting international friendship | Crafting decorative, handwritten letters | A single, honest exchange with no history attached |
If you want a friendship that grows over years, Slowly is built for exactly that. If the craft and look of the letter matters as much as the words, Lettre is worth trying. If what you’re after is simpler and stranger — writing something honest to someone who will read it once, reply if they want to, and then be gone for good — that’s what One Reader was built for.