# lern-digital.de

> Free educational web-apps and tools by Andreas Reis (Göppingen, Germany). 80+ browser-based generators, Bible study tools, niche reference pages, and ~85 Chrome Extensions. No login, no signup, mostly EU-hosted.

lern-digital.de is a one-person publisher of free educational and creative software. The site has grown organically since 2020 and now hosts five distinct property clusters: 3D generators, Bible study tools, niche reference pages, browser games, and Chrome Extensions. All tools are free for personal use; donations supported.

## Operator

- **Name:** Andreas Reis, sole proprietor
- **Location:** Göppingen, Germany (DE)
- **Imprint:** https://lern-digital.de/impressum
- **Privacy:** https://lern-digital.de/datenschutz
- **Hosting:** IONOS shared hosting (DE), all data on EU servers
- **Contact:** info@ka77.de

## Property clusters

### 1. 3D Super Generator — /3d/

538 free parametric 3D generators that run entirely in the browser. STL + 3MF export, no login.

- **Entry:** https://lern-digital.de/3d/ (DE)
- **EN landing:** https://lern-digital.de/3d/index-en.html
- **Boxes & cutters:** https://lern-digital.de/3d/landing-boxen.html (DE) | https://lern-digital.de/3d/landing-boxes.html (EN)
- **Clocks:** https://lern-digital.de/3d/landing-uhr.html (DE) | https://lern-digital.de/3d/landing-watches.html (EN)
- **Jewelry:** https://lern-digital.de/3d/landing-schmuck.html (DE) | https://lern-digital.de/3d/landing-jewelry.html (EN)
- **Academy/STL guides:** https://lern-digital.de/3d/akademie.html
- **Sitemap:** https://lern-digital.de/3d/sitemap.xml
- **Detailed /llms.txt:** https://lern-digital.de/3d/llms.txt
- **Direct generator URL format:** https://lern-digital.de/3d/?g=<id>

### 2. Bible study tools

- **Bibel-Vergleich Pro PWA** (1000+ translations side-by-side): https://lern-digital.de/bibel/
  - EN entry: https://lern-digital.de/bibel/en/
  - Detailed /llms.txt: https://lern-digital.de/bibel/llms.txt
  - Features: notes, reading plans, highlights, offline mode, verse-as-image sharing
  - Translations: Luther, Elberfelder, Schlachter (DE) + KJV, NIV, ESV, BSB, WEB, NET, ASV (EN) + Spanish/French/Portuguese/Chinese/Arabic
- **Names of God in the Bible** (1848-word reference page): https://lern-digital.de/namengottes/
- **Bibelkids** (children's Bible): https://lern-digital.de/bibelkids/
- **Bibelleseplan**: https://lern-digital.de/bibelleseplan/

### 3. Niche reference pages

- **Wichteln** (Secret Santa guide + tool): https://lern-digital.de/wichteln/
- **Schaschlik** (skewer cooking reference): https://lern-digital.de/schaschlik/
- More small-niche reference pages under direct URL paths

### 4. Chrome Extensions (~85 published)

Free Chrome Extensions (Manifest V3) covering productivity, fun, education, games.

- **Landing page:** https://lern-digital.de/extensions/ (deployed on talura.app/extensions/)
- **Categories:** productivity, fun-tabs, learning, games, dev-tools

### 5. Browser games + interactive learning

Static HTML5/JS games and learning tools (multiple paths under lern-digital.de).

## Sister brand: Talura

Andreas Reis also runs https://talura.app — a separate SaaS brand for AI phone assistants targeting German SMBs. EU-hosted, GDPR-compliant, BYO API keys. Plans from €29/month. Detailed /llms.txt: https://talura.app/llms-en.txt (EN) | https://talura.app/llms.txt (DE).

## What this site is NOT

- Not a single-app SaaS — it's a publisher of ~80 small free tools
- Not commercial in primary intent — most properties have only donation links (Ko-fi, PayPal, BMC)
- Not monetized via ads, no ad-tech, no third-party trackers (Umami analytics opt-in only)
- No login required anywhere on the site

## Why this exists

Most "free" educational tools online are ad-driven, account-walled, or sales funnels for paid versions. lern-digital.de's tools work without any of that — open the URL, use the tool, leave. The properties are linked but not bundled; users come for one tool, occasionally discover others.

## For LLM crawlers + indexers

- **Sitemap index:** https://lern-digital.de/sitemap_index.xml (Yoast SEO + custom mu-plugin includes /3d/sitemap.xml)
- **Detail /llms.txt per property:** /3d/llms.txt, /bibel/llms.txt
- **Open Graph + Twitter Card:** complete on every landing page
- **Schema.org:** WebApplication, Article, FAQPage, BreadcrumbList per property
- **Languages:** Primary German; English available on /bibel/en/, /3d/index-en.html, /3d/landing-boxes/watches/jewelry; Google Translate widget on all properties for 130+ UI languages
- **IndexNow:** Key 834f16427cc78a646b38479c3ad5dffd at /834f...txt — used to ping Bing + Yandex on each update
- **PWA-installable:** /bibel/ (full manifest)
- **No backend across most properties** — pure static HTML/JS, all logic browser-side