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TL;DR
Gewerkton, a construction-site documentation tool built by Thorsten Meyer, replaced the look of its apps, Studio, icons and multilingual website on Oct. 2-3, 2026. The company says AI coding agents carried out implementation from an approved plan, while Meyer reviewed releases and films; testing also exposed problems that required human inspection and fixes.
Gewerkton, a construction-site documentation tool built by Thorsten Meyer in Iffeldorf, Bavaria, replaced the design of its web and phone apps, Studio, icons and multilingual website on Oct. 2-3, 2026. The publisher says AI coding agents implemented the work from plans Meyer approved, with him reviewing and releasing each part; the original analysis notes that the two-day timeline refers to execution, not design work starting from scratch.
The redesign, named HORIZON, covered the web app, iPhone and Android apps, Studio, all 26 icons and a website comprising 529 pages in 40 languages. The web app moved 281 hard-coded colour values into design tokens, retained 11 deliberate exceptions and restyled 47 cards. Phone app version 0.5.0 adopted the new look, as did Studio in light and dark modes. The icons were re-rendered in Blender in cobalt and navy.
The website’s opening section was rebuilt with real product screens. Gewerkton reports uploading 1,583 files without an error. It also ran 228 AI film jobs for five regions, including regional versions for 222 of the runs, and produced eight help videos. Those figures describe the project’s reported scope; they are not an independent evaluation of the redesign or its effect on customers.
Meyer approved a written plan that listed open decisions, options and recommendations. Agents worked in a separate code copy on their own branch, and each portion remained unreleased until Meyer reviewed it. Films featuring the apps were held until he had approved the new interface, and paid reruns also needed his explicit authorization. Apple’s program agreement presented another human checkpoint: the iPhone build was blocked until Meyer accepted the latest license agreement.
Brand relaunch · Oct. 2–3, 2026
How To Refresh A Brand In Two Days
Gewerkton’s HORIZON relaunch brought a new look to its construction documentation tools, Studio, icons and multilingual website. AI coding agents carried out implementation from an approved plan, while Thorsten Meyer reviewed releases, films and visual results.
“The two days cover the execution, from the approved plan to the live website.”
An interim visual draft existed on Sept. 26. The reported timeline describes implementation, not design work beginning from scratch.
One design system, many surfaces
The publisher reports a broad visual update spanning product interfaces, supporting media and a large multilingual web presence.
Web app
Moved 281 hard-coded colour values into design tokens, retained 11 deliberate exceptions and restyled 47 cards.
iPhone & Android
Phone app version 0.5.0 adopted the HORIZON look. The publisher reports 853 of 853 tests passing.
Studio
Updated in light and dark modes; the publisher reports 2,158 of 2,158 tests passing.
26 icons
Re-rendered in Blender with cobalt and navy tones to align the product icon set with the new direction.
529 pages, 40 languages
The website’s opening section was rebuilt with real product screens. Gewerkton reports uploading 1,583 files without error.
Films & help videos
Eight help videos and regional AI film work for five regions were part of the reported project scope.
Agents implemented; people held the gates
The account describes a planned, reviewed release process rather than an instruction to redesign and publish everything at once.
Approve the plan
Meyer reviewed written plans with open decisions, options and recommendations.
Build on a branch
AI coding agents worked in a separate code copy on their own branch.
Test and inspect
Tests and visual checks covered widths, languages, themes and media.
Review and release
Each portion stayed unreleased until Meyer reviewed it. Paid film reruns needed explicit approval.
“Gewerkton is built by our publisher — we build it ourselves and write down what we learn.”
Publisher disclosureReported checks and a documented adjustment
Testing covered multiple viewports and languages. The numbers below come from the publisher’s account, not an independent audit.
Reported test coverage
Web app inspection included English, German, Japanese and Hindi at 390, 834 and 1,440 px, in light and dark modes.
Contrast decision
The initial colour missed the team’s 4.5:1 working threshold. It was darkened to 4.80:1, above that threshold.
Automation missed visual defects
Human inspection found problems that automated checks did not catch across the interface and film work.
What review uncovered
- White icon tiles covered nearby labels in dark mode.
- Red details in shadow or warm backlighting escaped the film colour mask.
- Some recolouring attempts changed lips, faces or stickers.
- Android testing found camera-screen buttons breaking words mid-line; a German cancel label wrapped onto two lines.
What the account says happened
- 24 files were corrected; 10 regional versions with leftover red were temporarily replaced by the European cut.
- Nine regional runs were later reshot with approval and passed visual review.
- Film production paused after round nine, when 38% of jobs were failing; 208 of 228 runs were complete at that point.
- Five major findings from a Pixel 10a Android test are planned for version 0.5.1; no release date is given.
Eight web-app tests across seven files were reported as failing. The publisher says the redesign did not cause them and did not fix them.
Open issue · Independent impact assessment unavailableScope is clear; customer impact is not
These figures describe Gewerkton’s reported project output. They do not establish broader results.
Execution scope
Apps, Studio, icons, website, films and help videos were included in the two-day implementation account.
Quality evidence
Test counts and upload totals are supplied by the publisher; no independent test report is provided.
User outcomes
No customer-impact, usability or performance data is included. Adoption and business effects remain unknown.
The account reports an approximate film-project cost of $134 and says 76 failed jobs were not billed. It does not provide a fuller cost breakdown or final disposition for every affected film.
Human Review in the Release Process
The case offers a specific account of how a small product team used AI agents on a multi-part software and brand update: agents handled implementation, but approval, release and visual judgment stayed with the publisher. The reported workflow included separate branches, tests and human release gates, rather than a single instruction to redesign and publish the product.
The reported problems also show why those controls matter. Automated tests did not catch white icon tiles that obscured nearby labels in dark mode, and an automatic colour mask missed red details in some film footage. Meyer found these issues through visual inspection. The publisher’s account suggests that test results alone were not treated as proof that the work looked right across screens and media.
For readers considering AI-assisted product work, the figures show both output and limits. Gewerkton reports broad changes completed over two days, but the account is self-reported by the publisher that built the product. It does not establish that the same pace or quality would apply to other teams, or that the redesign improved adoption, usability or business results.
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The Draft Behind the Two-Day Claim
The relaunch had an earlier design step: an interim draft dated Sept. 26, 2026 was carried into the Oct. 2-3 implementation. Gewerkton therefore describes two days as the period from an approved plan to the live website, not as the time needed to conceive the visual direction, settle every design choice or complete all later corrections.
The publisher says the agents used Codex and Claude and implemented written plans. Meyer approved the plans, reviewed results and released each part. Where the implementation departed from the plan, the team logged the change and chose the conservative option. For example, the planned cobalt did not meet Gewerkton’s working contrast threshold: it measured 4.38:1 against the light background, below the company’s 4.5:1 standard under WCAG 2.1 AA. The colour was darkened to 4.80:1.
Testing was conducted across different screen widths and languages. The web app was inspected in 200 views in English, German, Japanese and Hindi at 390, 834 and 1440 pixels, in light and dark modes. Gewerkton reports that the phone app passed 853 of 853 tests and Studio passed 2,158 of 2,158. Its website passed seven test suites and was checked in a browser across three widths and five regions, including after upload.
“Gewerkton is built by our publisher — we build it ourselves and write down what we learn.”
— Gewerkton’s publisher disclosure
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Remaining Bugs and Open Questions
The project account reports eight failing web-app tests across seven files. Six files reportedly fail the same way on the main branch, while another failure depends on test order and passes when run alone. Gewerkton says the redesign did not cause these failures, but also did not fix them. The account does not provide an independent test report or identify the failures in enough detail to assess their practical impact.
Visual review found issues that automation missed. White icon tiles covered labels in dark mode; red in shadow or warm backlighting escaped the film colour mask; and some recolouring attempts altered lips, faces or stickers. The company says it corrected 24 files and temporarily replaced 10 regional versions containing leftover red with the European cut. Nine of those runs were later reshot with Meyer’s approval and passed visual review. The account does not specify the final disposition of every affected film.
Production was paused after round nine when 38% of film jobs were failing, with 208 of 228 runs completed at that point. Gewerkton says the 76 failed jobs were not billed. It also reports an actual film-project cost of about $134, but the supplied account ends before giving a fuller cost breakdown or the scope included in that figure. There is no customer-impact, usability or performance data in the material, so the redesign’s effect on users remains unknown.
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Planned Fixes for Version 0.5.1
Gewerkton says five major findings from an Android test on a Pixel 10a are scheduled for version 0.5.1; none was classified as a blocker. One reported example involves larger type and padding causing buttons on the camera screen to break words mid-line. The German cancel label wraps onto two lines. The publisher has not supplied a release date for the update.
The film work also included follow-up reshoots: nine regional versions were redone after visual review and approval. The source account does not give a timetable for any remaining film corrections or say whether further changes to the website or apps are planned. The next measurable development is the release of version 0.5.1 and any subsequent account of fixes or customer feedback.
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Key Questions
What did Gewerkton change in the relaunch?
Gewerkton applied its HORIZON design to the web app, iPhone and Android apps, Studio, 26 icons and a 529-page website available in 40 languages. The project also included 228 AI film runs for five regions and eight help videos, according to the publisher.
Did the entire redesign begin and finish in two days?
No. Gewerkton says an interim design draft from Sept. 26, 2026 was used during the Oct. 2-3 implementation. The two-day claim refers to execution from an approved plan to the live website.
What did the AI agents do, and what did Meyer approve?
AI coding agents implemented work from written plans on a separate code branch. Meyer approved the plans, reviewed the results and released each part. He also approved paid film reruns and films showing the apps after reviewing the interface.
Were all reported tests successful?
No. Gewerkton reports eight web-app test failures across seven files, which it says were not caused by the redesign. It also found visual problems through human review, including icons that obscured labels in dark mode and missed red details in film footage.
What happens next?
The publisher says five major findings from its Pixel 10a Android test are scheduled for version 0.5.1. No release date was provided, and the account does not establish the redesign’s effect on customers or product performance.
Source: ThorstenMeyerAI.com
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