APMLensAPMLens

Watch your apps breathe. Built with Faithful Vigilance.

The professional choice for simple, focused application performance monitoring. APMLens.

No credit card required · free forever for side projects

How It Works

Every trace gives you the complete picture

See the full performance breakdown: latency, throughput, and error rates

Install Light Agent

Step 1

One line of code. Zero external dependencies. High-density forensic telemetry for Ruby and more.

Forensic Analysis

Step 2

Deep visibility into your services. Watch every SQL query, HTTP dependency, and cache hit in real-time.

Forensic Triage

Step 3

Automatic diagnostic grouping. Spot the exact reason for latency spikes or error floods across your services.

Faithful Vigilance

Step 4

The peace of mind that comes from knowing someone is watching. Simple, focused, and stewardship-driven.

Features

The fastest checks, the clearest data

High-frequency monitoring built for developers who need the full picture

Real-time Metrics

60-second resolution metrics. Precise enough to spot trends without the diagnostic noise.

Deep Observability

Automatic instrumentation for database, cache, and HTTP calls.

Sub-Second Latency

Built for speed. Low overhead monitoring that won't slow you down.

Forensic Diagnostics

Automatic detection for N+1 queries, slow SQL, and memory bloat. Pinpoint the exact bottleneck instantly.

Pricing

Simple pricing. No surprises.

Free for side projects. $9.99/month for full resolution and data retention.

Hobby

$0 /mo

Perfect for side projects and individual developers.

3 Services
60-second resolution
7-day history
Full Performance Tracking
Error Ingestion
Recommended

Pro

$9.99 /mo

Scale your monitoring with unlimited power.

50 Services
60-second resolution
30-day history
Full Performance Tracking
Error Ingestion