macOS app that shows how full the urine tank on the ISS is
Yes, the urine tank on the International Space Station. In real time, I might add! This uses the official live telemetry stream from Lightstreamer, although – at least at the moment – it doesn't eg. check what the signal status is so telemetry might be down altogether and you'd never know. Maybe in v0.2. Native menu bar application, so it doesn't require running a copy of Chromium and Node to show you two emojis and a percentage. I got the idea for this when somebody linked to https://iss-mimic.github.io/Mimic/ joking about how we can see in real time how full the urine…
In plain words
This macOS menu bar application displays real-time data on the International Space Station's urine tank capacity using NASA's official Lightstreamer telemetry stream. Designed for space enthusiasts and developers, it shows tank fullness as a percentage with visual indicators. Built as a native Swift application, it runs efficiently without requiring Electron or Node.js resources. The app currently displays live data without signal status monitoring, a feature planned for future versions.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Yes, the urine tank on the International Space Station. In real time, I might add! This uses the official live telemetry stream from Lightstreamer, although – at least at the moment – it doesn't eg. check what the signal status is so telemetry might be down altogether and you'd never know. Maybe in v0.2. Native menu bar application, so it doesn't require running a copy of Chromium and Node to show you two emojis and a percentage. I got the idea for this when somebody linked to https://iss-mimic.github.io/Mimic/ joking about how we can see in real time how full the urine tank on the ISS is; after I understood that there's a public live telemetry stream I knew in my heart I had to do something very silly with it. I've also finally been learning Swift and macOS programming in general and I figured this'd be an excellent first Swift project, so here we all are. Just as an aside, the "ISS Mimic" project itself is very interesting and worth checking out (https://github.com/ISS-Mimic/Mimic). I'm in no way, shape or form affiliated with them and they have no idea who I am.
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