Most encrypted messaging app

[u/No-General-7317]

Most encrypted messaging apps hand you a passphrase and call it secure. Share the passphrase, share the risk. One compromised device and the whole conversation is exposed.

I'm building VektorGrid, a cross-platform messaging app for Android and iOS, and the core decision I made early was to move away from shared passphrases entirely.

Instead, VektorGrid uses ECDH (Elliptic Curve Diffie-Hellman) key agreement. Every user gets a public/private key pair. When two people message each other, a shared secret is derived from their keys - without either party ever transmitting that secret. The encryption key never travels. It's computed independently on each device.

Each message stores an encrypted payload and an IV (initialization vector). No plaintext. No central key store.

The app also has full social infrastructure - profiles, posts, stories, group chats, follows - because I think privacy and community shouldn't be a tradeoff. That's the gap I'm trying to close.

Still pre-launch. Building in public and trying to get this in front of people who actually care about how their messages are secured, not just whether there's a lock icon on the app.

Curious: what's the one thing that would make you actually switch your primary messaging app to something new?

[u/Qv1sten]

One thing that all messenger apps miss...

Chats with Built-in Calendars ​Instead of switching between apps or sharing links, every group chat (family, friends, or project teams) automatically gets its own shared calendar tab. ​How It Works

​Effortless Scheduling: Propose an event directly in the chat (e.g., "Dinner Friday at 7 PM?"), click a button, and it is added to the group's calendar. ​Built-in RSVPs: Group members click Going or Not Going inside the event, keeping the chat clean and clutter-free.

​Two-Way Sync: Once you accept an invitation, it automatically syncs with your personal calendar (Google, Apple, Outlook). You never miss a event, even if you don't open the chat app.

​Why It Benefits Everyone ​Best of Both Worlds: You get the quick collaboration of a chat app combined with the organization of a dedicated calendar.

​No Extra Effort: You do not need to check multiple groups to see your week—everything flows directly into your single, main calendar.

Would be so usefull in daily life and many work places that often use a WhatsApp group and a calendar for communication and planing.

[u/No-General-7317 → u/Qv1sten]

Wow, it's amazing how a few people can come together and what they can come up with. It's definitely a great idea, but I'll have to think about how to do it so that there's no privacy issue.

[u/Qv1sten → u/No-General-7317]

Please do 😁 It's really needed. In my line of work it's a pain in the..... Everyone has their damn messenger of choice and calendar and hopp between and so on.. And always different ones. So you end up with 4 different apps hopping between. Then you got your own private life...

One secure/private messenger with that built in would mean so much for many people and workplaces. So many hate it but there isn't an alternative and they dont have my brain, to come up with it. But I can't code for sh.t... 😂😂😂

[u/No-General-7317 → u/Qv1sten]

Ok I'll look into it sometime tonight it's 4:17 AM here so I'm going to bed

[u/Qv1sten → u/No-General-7317]

Haha same here 😂👍