SwiftyBeaver - SwiftyBeaver is a logging platform for Swift with end-to-end encryption.
Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
Grafana - Data visualization & Monitoring with support for Graphite, InfluxDB, Prometheus, Elasticsearch and many more databases
Loki - Record 10 seconds a day & make a life movie.
Prometheus - An open-source systems monitoring and alerting toolkit.