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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 recommend you Quickpic, it has been the best so far I've tried, but use the one in the GitHub site, I use that one, look for the "alternative apk", and it will say "danger for this apk" when you install it but is safe. Here is the link to download it.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.