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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.
The iOS app only syncs via iCloud or Obsidian Sync. I was in a similar situation (wanted to sync to Linux PCs and iPhone without paying for Sync), but I do have one always on Mac, so I set up a script that runs every minute, syncing my vault on iCloud with an identical vault on Synology Drive. My script basically just runs Unison once every few minutes to keep the two vaults in sync.
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