Trifle.Stats

Time-series metrics for Elixir. Track anything (signups, revenue, job durations) using the database you already have. No InfluxDB. No TimescaleDB. Just one call and your existing PostgreSQL, MongoDB, Redis, MySQL, or SQLite.

Part of the Trifle ecosystem. Also available in Ruby and Go.

Why Trifle.Stats?

No new infrastructure. Uses your existing database. No dedicated time-series DB to deploy, maintain, or pay for.
One call, many dimensions. Track nested breakdowns (revenue by country by channel) in a single track call. Automatic rollup across dynamic time granularities (1m, 6h, 1d, etc.).
Library-first. Start with the package. Add Trifle App dashboards, Trifle CLI terminal access, or AI agent integration via MCP when you need them.

Quick Start

1. Install

def deps do
  [
    {:trifle_stats, "~> 2.0"}
  ]
end

2. Configure

# config/config.exs
config :trifle_stats,
  driver: Trifle.Stats.Driver.Postgres,
  granularities: [:hour, :day, :week, :month]

3. Track

Trifle.Stats.track("orders", DateTime.utc_now(), %{
  count: 1,
  revenue: 4990,
  revenue_by_country: %{us: 4990},
  revenue_by_channel: %{organic: 4990}
})

4. Query

Trifle.Stats.values("orders", ~U[2026-02-10 00:00:00Z], DateTime.utc_now(), :day)
#=> %{
#     at: [~U[2026-02-10 00:00:00Z], ~U[2026-02-11 00:00:00Z], ...],
#     values: [%{"count" => 12, "revenue" => 59880, ...}, ...]
#   }

5. Process with Series

Trifle.Stats.values("orders", from, to, :day)
|> Trifle.Stats.series()
|> Trifle.Stats.Series.transform_expression(["revenue", "count"], "a / b", "avg_order")
|> Trifle.Stats.Series.aggregate_sum("count")

Drivers

Driver	Backend	Best for
API	Trifle Cloud Projects	Hosted metrics without your own database
Postgres	JSONB upsert	Most production apps
MongoDB	Document upsert	Document-oriented stacks
Redis	Hash increment	High-throughput counters
MySQL	JSON column	MySQL shops
SQLite	JSON1 extension	Single-node apps, dev/test
Process	In-memory (ETS)	Testing

Features

Dynamic time granularities. Use any interval like 1m, 10m, 1h, 6h, 1d, 1w, 1mo, 1q, 1y.
Nested value hierarchies. Track dimensional breakdowns in a single call.
Pipe-friendly Series API. Chain aggregators, the expression transponder, and formatters.
Precision mode. Decimal-based arithmetic for financial data.
Data compatible. Same storage format as the Ruby and Go implementations.

Documentation

Full guides, API reference, and examples at docs.trifle.io/trifle-stats-ex

Trifle Ecosystem

Trifle.Stats is the tracking layer. The ecosystem grows with you:

Component	What it does
Trifle App	Dashboards, alerts, scheduled reports, AI-powered chat. Cloud or self-hosted.
Trifle CLI	Query and push metrics from the terminal. MCP server mode for AI agents.
Trifle::Stats (Ruby)	Ruby implementation with the same API and storage format.
Trifle Stats (Go)	Go implementation with the same API and storage format.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/trifle-io/trifle_stats.

License

The package is available as open source under the terms of the MIT License.