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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.
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uhuruphotos-android
🖼️A modern media gallery, with features like backup/sync, semantic search, media map, face recognition, memories and much more built using the latest Android technologies.
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photoprism-android-client
📸 A convenient Android gallery for your PhotoPrism library with plenty of useful features
I would suggest Immich.
Nextcloud + Les Pas. With Nextcloud, you can selfhost more services than just photo, like calendar and contact syncing, even group chat and video/voice call, all in the same box without even worry about single signon issue. And Led Pas is probably the best photo management app for Android platform with Nextcloud as it's backend.