-
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.
To your point about app stores not allowing PoW, that's a fair point and might be an issue. Stupid walled gardens on both platforms. Still it might fall under "spam captcha" instead of mining. Discussion on it here https://github.com/appditto/natrium_wallet_flutter/issues/24
I'd have to look at the natrium server code (which is here) to see what the behavior is
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.