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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.
There are also a number of external third party tools that deal with their format and that can help to convert things into whatever you need, if the base data allows to do that. You might find something in the https://github.com/reHackable/awesome-reMarkable list, depending on what exactly you are trying to do, if the reMarkable softare itself is not sufficient for that, but that depends on your exact usecase.
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.