The level showed the article already in the sentence ("unter dem Stuhl"),
so it was answerable by recognising "dem" — it never tested wohin/wo at
all. And the frame pool was tiny: one cat, one lamp, eight nouns.
- The article is now blanked. The only evidence is the verb and whether it
has a direct object, which is the actual skill. The solved sentence is
revealed on answer, contracted where German really contracts (ins Regal,
am Bahnhof), with a note naming the fusion.
- Frames rebuilt around what decides the case: 27 new nouns, 18 new verbs,
and every frame one-way so no verb+noun pairing licenses both readings.
- Motion verbs now appear on the DATIVE side on purpose — schwimmen im See,
tanzen in der Kueche, spielen auf der Strasse — because "is it moving?" is
the wrong test and that is the main thing learners get wrong.
- The put/be pairs are drilled properly: legen/liegen, stellen/stehen,
setzen/sitzen, plus haengen and stecken, which keep the same present tense
either way so only the direct object tells you.
- ankommen added as the lexical exception: Dativ despite obvious arrival.
- New "Wohin oder wo?" info panel: the rule, the before-and-after test, the
movement trap, the verb-pair table and the exception. Reachable from the
practice screen, from the answer feedback, and from Charts.
- Feedback now explains the specific sentence rather than restating theory.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017Uza6mhTpAvSwMQuFc4Cz8
Deklinationstrainer
A daily-practice German declension trainer. Self-hosted so your progress actually saves.
Deploy to Coolify
One-time setup
-
Push these files to a git repo (GitHub / Gitea / whatever Coolify is connected to).
-
In Coolify, create a new Application:
- Source: your git repo
- Build pack: Nixpacks (auto-detects Vite) or Static
- Build command:
npm run build - Publish directory:
dist - Port: not needed for static output (Coolify serves it directly)
-
Add a domain (e.g.
deklination.yourdomain.com). Coolify provisions HTTPS via Caddy/Traefik automatically. -
Deploy. Visit the URL on any device.
Local dev
npm install
npm run dev # http://localhost:5173
npm run build # outputs to ./dist
On iPhone
Open the URL in Safari, tap Share → Add to Home Screen. It opens fullscreen like a native app, and progress saves in localStorage across reboots, sessions, and app closes.
Storage
The app tries window.storage first (Claude artifact environment), then falls back to localStorage. When self-hosted, only localStorage runs, which iOS Safari persists reliably.
To wipe progress: open browser devtools → Application → Local Storage → delete the gd-v10 key. Or on iPhone: Settings → Safari → Advanced → Website Data → search your domain → delete.
Stripe checkout
Beug uses public Stripe Checkout or Payment Link URLs, supplied through environment variables. Do not put Stripe secret keys in this Vite app.
Payments are behind a launch-mode flag:
VITE_PAYMENTS_ENABLED=false
When VITE_PAYMENTS_ENABLED is absent or false, the app runs in Reddit/free mode: all lessons are usable, paid rows are not blurred, and the paywall/pricing screen is hidden. The Stripe URLs can stay configured in the environment so billing can be switched back on later with one env change.
To turn payments back on, set:
VITE_PAYMENTS_ENABLED=true
Create one product in Stripe, for example Beug Premium, with three prices:
- Weekly subscription:
$2.99every week - Yearly subscription:
$9.99every year - Lifetime access:
$19.99one-time payment
Create a Payment Link or Checkout link for each price. Set the success redirect URL to:
https://beug.george1.dev/?checkout=success
Set the cancel URL to:
https://beug.george1.dev/
Then add these public URLs in the deployment environment:
VITE_STRIPE_YEARLY_URL=https://buy.stripe.com/...
VITE_STRIPE_LIFETIME_URL=https://buy.stripe.com/...
VITE_STRIPE_WEEKLY_URL=https://buy.stripe.com/...
The current v1 unlock is intentionally simple: after Stripe redirects back with ?checkout=success, Beug stores the unlock in this browser's localStorage. This avoids accounts for the tiny-app version, but it is a soft paywall. A stricter version needs a small backend, Stripe webhooks, and account or email-based entitlement lookup.
Future prompt to re-enable payments
Turn payments back on for Beug. Set VITE_PAYMENTS_ENABLED=true in Coolify, keep the three existing Stripe Payment Link env vars, redeploy the app, and verify that unpaid users see the soft paid lesson blur, that charts remain visible, and that tapping a paid lesson opens the pricing screen with Weekly, Yearly, and Lifetime plans.