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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.
Open source as they both: https://github.com/TweakiOS/EasyCommand
I think many devs don't realize how powerful control center providers are, documentation is available on GitHub: https://github.com/opa334/CCSupport/wiki
NOTE:
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Hence, a higher number means a more popular project.