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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I personally spent a significant part of my spare time in the last few months researching this topic, and came to the conclusion that for my (very similar) project, I'd like to use Flutter and Dart for the UI and Rust with wgpu (maybe bevy) for the rendering backend. I'm working on an integration for native platforms (so everything except web) right now, it's available in earliest alpha here. Web itself is trivial, because you can simply mount a separate canvas as a platformview and use that for wgpu, completely separating the two worlds.