-
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 think either one would be fine. I know pocketbook prices are better especially in the used department. If you do go with the era I suggest keeping your kindle and use calibre. I'm not sure if you can just move the books straight to your pc or not so with calibre you should be able to access your ku books, remove the drm with this plugin, and then put those books your the pocketbook era.
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.