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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.
For apps, I use Calibre (https://calibre-ebook.com/) installed on my Laptop to manage my library it manages the moving of books to and fro and keeping their data up to date. On my phone I use FBReader (https://fbreader.org/) connecting to the ODPS server provided by Calibre to read non-comic works.
As far as reading comics on the phone, I haven't finished setting it up yet but I intend to use Komga (https://komga.org/) as a manager for them and it's addon for Tachiyoma (https://tachiyomi.org/) to read the comics. I already have about 200 manga and 50 or so western comics that I get online and read via Tachiyomi and prefer it to FBReader for visually based content mostly due to the work that went into designing it to be explicitly for graphics and the fact that FBReader doesn't support some of the more popular formats for comics (not that much of a problem with Humble Bundle stuff since there is usually at least a PDF included for most comics and FBReader _does_ support that).