01
Two learners reinforce errors
If you and your partner are both learning German, neither of you can reliably catch what the other gets wrong. You don't know what you don't know.
You and your practice partner — a friend, family, your other half, anyone you're learning with — are both studying the same language. Text each other in it — Chatmend's quiet coach catches the mistakes neither of you can see, and explains the why only when you ask.
Two learners texting in German will happily reinforce never catch each other's mistakes — until a third party who knows the language is quietly in the room.
If you and your partner are both learning German, neither of you can reliably catch what the other gets wrong. You don't know what you don't know.
Nobody wants to correct every text their partner sends. Constant correction is awkward — so it quietly never happens.
Translators bridge people who don't share a language. Drill apps are solo and synthetic. Neither lives inside a real conversation with someone you care about.
The conversation is never blocked. Your message goes out as written, then your bubble picks up a quiet marker — three states, glanceable first, deep only on demand.
A light check. Silence-as-reward — you nailed it, and the app simply says so.
Correct, but a native would phrase it differently. A gentle suggestion — “koche” — not a failure.
A red underline on the exact words. Tap to open the fix, the one-line reason, and “teach me why”.
Tap a marked message and you get the corrected version with the changes highlighted, plus a one-line reason for each. Want the real lesson? It's one tap away — never in your face.
mit, zu, von, nach take the dative — mit mein → mit meinem
Subordinate clauses push the verb to the end — …weil ich müde bin
Down from 8× last week — keep going.
A separate space turns scattered corrections into a picture of how you're improving — all derived from chats you actually had, not a synthetic curriculum.
Mark a language as native and you're never corrected when you write it. So a fluent partner, friend, or family member can sit in the same chat as learners — their messages are natural input the learners absorb, while only the learners' attempts get coached. Mixed-proficiency groups just work.
Chatmend is built around data minimization: the chat is the disposable carrier, the corrections are the keepsake.
Once a message is corrected and past a short window, its body is cleared automatically. We keep your learning, not your chatter.
Message contents are encrypted with the key held in the backend, never in the database. Access is scoped to the people in the conversation.
Everyday beginner traffic is the bulk — and exactly where small on-device models shine. Over time, those corrections never leave your phone.
The habit should cost you nothing. Pay only when you're invested enough to want the heavy, high-value coaching.
Invite the person you want to practise with.
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We're building Chatmend for iOS and Android. Leave your email and we'll tell you the moment you and your practice partner can get in.