Own products · live
Data made visible – every day, for everyone.
The Zeilen family: each “Zeile” answers an everyday question – from open and official data, the Nachtausgabe with puzzles of its own. No account, no cookies, no third-party ad or analytics scripts. We build this for ourselves. You get the same care. (The products are in German.)
01The Zeilen
One family, one hand.
Someone looking for a campsite also needs the weather, the night sky and the right time to fill up. Each Zeile stands on its own – and points to the others where it helps.
- WetterzeileThe weather in linesRain for the next 2 hours for 82,436 places · DWD data onlyWork sample for Visualisation · Geodata & remote sensingwetterzeile.com Case study →
- TankzeileFilling stations and the right time to fill upThe right time to fill up under the 12 o’clock rule · 10,371 stations as of 30 Sept 2026Work sample for Visualisation · Web & softwaretankzeile.de Case study →
- CampingzeileCampsites and motorhome pitches7,764 sites from open geodata · weather, driving time, nightWork sample for Geodata & remote sensing · Web & softwarecampingzeile.de Case study →
- FreizeitzeileThings to do nearby21,401 places to visit from OpenStreetMap · the window when DWD weather and opening hours matchfreizeitzeile.de
- HimmelszeileStars, moon and clouds tonightNight-time clouds from the DWD · 109 Messier objects · explore freelyWork sample for Visualisation · Geodata & remote sensinghimmelszeile.de Case study →
- JahreszeileSchool holidays, public holidays, bridge daysSchool holidays of all 16 states, cross-checked with the ministriesWork sample for Visualisation · Web & softwarejahreszeile.de Case study →
- WahllageElection polls, honestly averagedBundestag and 16 state parliaments · uncertainty visibleWork sample for Visualisation · Web & softwarewahllage.de Case study →
- Die NachtausgabePuzzles and games, new every day13 puzzles and 8 daily deals, new every dayWork sample for Web & softwaredienachtausgabe.de Case study →
02Also by headon
More products of our own.
- RechnerzentraleCalculators for money, work and everyday lifeEvery formula tested against official valuesWork sample for Web & softwarerechnerzentrale.com Case study →
- AphantasieSelf-tests on the mind’s eye#1 on Google for “aphantasie test” (Search Console, avg. 1.5, 23–30 Sep 2026) · 7 self-tests · 5 languagesWork sample for Web & software · Visualisationaphantasie.org Case study →
- Mind AtlasA map of inner perceptionScrollytelling above a WebGL nebula · 0 answers on the serverWork sample for Visualisation · Web & softwaremymindatlas.org Case study →
- GPSR SuiteShopify app: product safety detailsManufacturer details under EU Regulation 2023/988 in Shopify metafields, also in bulk · servers in Germanygpsr.headon.pro
- COA SuiteShopify app: certificates of authenticityOne certificate per paid order, QR verification without customer data · servers in Germanycoa-license-pdf.headon.pro
03What they share
The same rules as for your project.
01
Evidenced data
Official and open sources with verified licences, every figure dated. Estimates are labelled as estimates.
02
Data-minimal
No account, no cookies, no third-party ad or analytics scripts. What is not needed never leaves the device.
03
Tested
Calculations as tested functions before the interface exists. Every Zeile has its own test suite.
04
Fast
Server-rendered, without ballast. The answer comes first, details follow as you scroll.
Something like this for your data?
Maps, lines, calculators or a whole page that answers one question: tell us which data you want to make visible.