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Kindler Dev

App · Mac

STLKit — Privacy Policy

Last updated: 2026-11-09

STLKit processes your meshes only on your Mac. The app collects no data. There is no account, no analytics, no tracking, no advertising identifiers and no third-party SDKs. The only data that leaves your Mac is what you send yourself through the optional feedback form in the About window.

Controller

Björn Kindler
Kindler Dev
Bischofshofener Str. 9
82008 Unterhaching, Germany
Phone: +49 89 62084444
Email: info@kindler-dev.de

What stays on your Mac

Import, sculpting, surface tools, hole filling, mesh checks, the previews, the orbit video and every export run entirely on your Mac, without a server. Your meshes never leave your Mac. The app runs in the App Sandbox. It reads only the files you open and writes exported files only to the location you choose.

Settings are stored locally in the app's sandbox container on your Mac. STLKit does not sync or transmit them.

Network connections

STLKit works fully offline. Apart from the feedback form described below, it makes no outgoing network connections and sends no meshes, no usage data and no crash reports to me or to third parties.

Feedback form in the app

In the info area of STLKit you can report a bug, suggest a feature or send a general message. The form is only sent when you click “Send”. It then transmits, encrypted with TLS:

Using the form is voluntary. You can use the app without restriction if you do not send a message. Name and email address are optional. Without an email address, I cannot reply to you personally.

  • the type of request and your message,
  • your name and email address, if you enter them (both optional),
  • the app’s identifier (bundle ID), its version number and the version of your operating system. The form shows these details before sending. No device identifiers, location or usage data are transmitted.

The recipient is my own server whisper.kindler-dev.de, hosted by Hetzner Online GmbH in Germany. It stores the submission and notifies me by email through my own mail server in the EU. From there I transfer it into the customer records on my computer. To limit requests, the server stores your IP address only as a salted hash. Nothing is transferred to third countries or to AI services.

The legal basis is Art. 6(1)(b) GDPR (handling your request) and Art. 6(1)(f) GDPR (my legitimate interest in fixing bugs and improving the app).

Retention: submissions on the server and unassigned entries in my customer records are deleted after 180 days. I delete the notification email manually within 180 days. If your feedback turns into a conversation with you, I keep that correspondence for as long as legal obligations require. Backups expire with their normal rotation.

After sending, the app shows a receipt number. With it or your email address you can request information or deletion at any time: info@kindler-dev.de. You can also email me directly instead of using the form.

Links and email

Links in the app, for example to this website, open in your browser. Only when you then visit a website or send an email does data reach the website's host or me; for this website, see the website privacy policy.

Languages

The app is available in 18 languages: English, German, Czech, Danish, Spanish, Finnish, French, Italian, Japanese, Korean, Norwegian Bokmål, Dutch, Polish, Brazilian Portuguese, Russian, Swedish, Turkish and Simplified Chinese. This policy applies to all of them.

Purchase and download

STLKit is distributed through the Mac App Store. Purchase, payment, download and updates are handled by Apple. I do not receive any payment details. These processes are subject to Apple's privacy policy.

If you have allowed macOS to share analytics with app developers (System Settings ▸ Privacy & Security ▸ Analytics & Improvements), Apple may provide me with crash reports and usage statistics without personal identifiers. This is a function of macOS, not of STLKit, and you can turn it off there at any time.

What the app does not do

  • No analytics, no tracking.
  • No advertising identifiers.
  • No third-party SDKs.
  • No accounts, sign-ups or user identifiers.
  • No upload of your meshes.

Contacting me

If you send me an email, for example a bug report or a feature request, I use your email address and the content of your message only to answer you. Legal basis is Art. 6 (1)(b) GDPR where your message relates to the app you use, otherwise Art. 6 (1)(f) GDPR; my legitimate interest is answering your enquiry. I delete the correspondence when it is no longer needed, unless statutory retention periods apply.

Your rights

You have the right at any time:

  • to information about the data stored about you (Art. 15 GDPR),
  • to rectification of inaccurate data (Art. 16 GDPR),
  • to erasure (Art. 17 GDPR) and restriction of processing (Art. 18 GDPR),
  • to data portability (Art. 20 GDPR),
  • to object to processing (Art. 21 GDPR) where processing is based on Art. 6 (1)(f) GDPR,
  • to lodge a complaint with a supervisory authority; the authority responsible for me is the Bavarian State Office for Data Protection Supervision (BayLDA), Ansbach.

To exercise your rights or for any data protection questions, please use the contact details under “Controller” above.

Changes to this policy

Updates will be posted on this page with a revised "Last updated" date.

See also: STLKit · website privacy policy