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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.
If it's a very simple desktop app (win or linux), maybe you could give a chance to C.R.O.W., it's beta, and I try to keep it very simple (but extensible). You may test several simple tutorials and tell me what documentation you're missing, I'm currently updating the docs.
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