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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.
You can also tether downgrade your 5 to iOS 6 with https://github.com/synackuk/n1ghtshade (You'll need a computer to boot it each time it dies or reboots)
NOTE:
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Hence, a higher number means a more popular project.