First, the disclosure. Sotvo is our app. Here is how we compare it — and where the others are better.
A private chat app for couples is a messaging app built for exactly two people: end-to-end encrypted, closed to everyone outside the room, and kept apart from the noise of a main messenger. The best one depends on what the two of you want to keep. Between keeps a shared archive of the relationship. Signal keeps an encrypted history on your devices. Sotvo keeps nothing at all: no account, no phone number, no message written to any disk.
That difference decides the whole comparison. If you want a place that stores your story as a couple, Sotvo is the wrong pick and Between is a good one. If you want a room that exists while you talk and then forgets, that is what Sotvo is for. It is iOS-only, it has no group chats, and it is coming soon to the App Store.
What a couple actually needs from a private chat app
The searches vary: secret chat app for lovers, best private messaging app for couples, couples chat app. Underneath, they ask for the same four things.
- End-to-end encryption, so the service in the middle can never read what you write.
- No identity requirement, so the conversation is never tied to a phone number or an account that outlives it.
- Messages that leave on their own, so private things stay spoken instead of stored.
- A separate place, so intimate conversation does not sit in the same inbox as work threads and group plans.
The second point is the one most apps fail. A phone number is an identity: it survives breakups, it sits on shared family plans, and it ties the chat to everything else the number touches. The third point is a category of its own; we compared apps with disappearing messages separately. This page weighs all four at once.
How Sotvo works for two people
Sotvo is a private room for two people who already know each other. One person creates a room and shares a short invite code; the other person enters it. That is the entire setup. No sign-up form, no contact-list scan, no profile.
Sotvo is a messaging app that never asks for a phone number, so the room is never tied to who you are. No account exists behind it, which means there is nothing to recover and nothing to subpoena. No accounts. No subscriptions. No trace.
Messages live in memory only and vanish after two minutes. Nothing is written to disk, on either phone or on the server, and when both people leave, the room is gone. There is no archive, so there is nothing to go back and read.
we see that a room exists, never what’s inside.
That line is our privacy model in one sentence. The relay carries the room; it cannot read the messages, and your IP address is never logged, never stored. Sotvo is built on open source cryptography, and the security page explains how the encryption actually works without asking you to take anything on faith.
Screenshots deserve a plain sentence. They can’t be prevented, by Sotvo or by any other app, so Sotvo makes them loud instead: every screenshot attempt notifies the other person, every time, and that notice can’t be turned off.
We have been using rooms on a pre-release build since July 2026, and the habit that forms fastest is letting conversations end. You say what you mean while the room is open, because there is no transcript to lean on later.
it feels closer to talking than to texting.
Sotvo, Between, Signal, and WhatsApp, compared
Ask a couples forum this question and the answers split into two camps: relationship apps (Between, Just Between Us) and secure messengers (Signal, WhatsApp). The split is real, because the two kinds solve different problems. Between and apps like it give a couple a shared home: a calendar, photo albums, anniversary dates, a timeline you build together. Sotvo is none of that. There is no timeline, no album, no anniversary counter. It is a room, built to forget.
| app | built around | asks you for | what stays afterwards | choose it if |
|---|---|---|---|---|
| Sotvo | a two-person room | an invite code, nothing else | nothing; messages live in memory and vanish after two minutes | you want conversations that end when they end |
| Between | the relationship itself: calendar, albums, anniversaries | an account | everything, on purpose; the shared archive is the product | you want a scrapbook you build together |
| Signal | everyday encrypted messaging | a phone number | encrypted history on your devices, with optional disappearing timers | you want one messenger for everyone, on both platforms |
| the network your contacts already use | a phone number and your contact list | chats on the device and in backups, unless you turn on disappearing messages | the other person will never install anything new |
Two honest notes on Sotvo’s own column. It has no groups and no multi-device sync; a room for two phones is the entire product. And it is the wrong tool if you want to keep the messages, because nothing in it is designed to keep anything.
Pricing belongs in the comparison too. Signal is free and runs on donations. WhatsApp is free and owned by Meta. Between is free with paid extras. Sotvo’s model will be a single one-time unlock, with no subscription; the exact number is in the questions below.
If you’re on Android
Sotvo is iOS-only, so a couple split across platforms can’t use it. Signal is the recommendation there: cross-platform, free, and encrypted by default. Session is the alternative if sharing a phone number is the part you mind.
What should a secret chat app actually hide?
A secret chat app should hide the contents of a conversation, and nothing more. On this page, secret means the intimacy kind: a channel that belongs to the two of you and stays invisible to the platform carrying it. It does not mean hidden from the person you share a life with.
Apps built for concealment are a different category: disguised icons, decoy passcodes, calculators that open into photo vaults. Sotvo ships none of that. The app looks like what it is, every screenshot notifies the other person, and no mode exists to fool someone standing next to you. Privacy protects a conversation; deception targets a person. Sotvo is built for the first and useless for the second.
Questions couples ask before their first room
Which chat app is best for secret lovers?
For two people who already know each other, the short list is Sotvo for a room that keeps no trace, and Signal for an everyday encrypted messenger. Both encrypt end to end; the difference is what survives the conversation. Apps that hide behind fake calculator icons are a separate category, and we don’t recommend any of them.
What private chat app can you use with your spouse?
Any messenger in the table above works with a spouse; the real question is how much of the conversation you want remembered. Between stores a shared archive on purpose, Signal keeps history until one of you deletes it, and Sotvo keeps nothing once the room closes. That last option suits the kind of talk you would otherwise only have out loud.
How much will Sotvo cost?
The unlock will be a one-time $6.99 purchase, and there is no subscription behind it. Joining rooms is always free. One code, two people, no recurring bill.
When will Sotvo be available?
Sotvo is coming soon to the App Store, iOS-only at launch. It will initially be available in the US, Canada, Australia, New Zealand, and most of the EU. This page will link to the listing the day it goes live.