bluelake
I'm Sebastian Bartmann. Bluelake is the brand I publish my apps and tools under.
Family Sleep
A sleep tracker for families
An Android app for tracking your children's sleep.
- No account
- No ads
- No data shared with anyone
- End-to-end encrypted. I can't read your child's data.
Tools
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Third Party Check
Scans a website and shows every third-party connection it makes, before and after cookie consent.
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Request Search
Searches the data collected by the third-party checks for hosts and scripts.
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botfriendly.shop
Checks how readable an online shop is for AI agents: robots.txt, llms.txt, structured data.
About me
Data & analytics engineer from Austria. 10 years writing software → 5 years running my own company → now marketing tech infrastructure and agentic systems.
More about me at bartmann.xyz and LinkedIn.