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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've used a really nice app for android called FADU Timer (https://github.com/filmanddarkroom/FADU_Timer). It allowed me to create a really nice fstop based test prints, I especially liked the way it handled continuous/progressive strips with the help of its beeps.
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