Now with AI fix suggestions

Know what broke.
Know how to fix it.

Lightweight error monitoring for single devs and small teams. Catch JS errors, slow network requests, and web vitals across all of your projects — then let AI tell you exactly how to fix them. Paste 3 lines and you're live.

Start for freeNo credit card. No setup fee.
ultron.dev/dashboard
error

TypeError: Cannot read properties of undefined (reading 'name')

/dashboard/profile · Chrome · 2s ago

network

Server error 503 (Service Unavailable): GET /trips/deferred-ids — 30,217ms

/trips · Safari · 4m ago · slow

vital

LCP 4821ms (poor)

img#hero · navigate · ttfb: 842ms · 12m ago

resource

Failed to load: /fonts/brand-display.woff2

/landing · Firefox · 18m ago

AI Fix Suggestion

The user object may be null during initial render. Add optional chaining: user?.profile?.name or guard with an early return.

Setup in under 60 seconds

# 1. install
npm install @ultron-dev/tracker

# 2. drop in 3 lines
import { initTracker } from '@ultron-dev/tracker'

initTracker({
  apiKey: 'your-api-key',
})

# 3. that's it

Everything you need. Nothing you don't.

Most error tools were built for enterprise teams. Ultron was built for the developer actually shipping the code.

JS Error Tracking

Automatic capture of unhandled errors and promise rejections — with full stack traces, device, browser, and session context.

Network Monitoring

Every slow or failed fetch and XHR request captured automatically. Status codes, response bodies, timing breakdown, query params.

Web Vitals

LCP, FCP, CLS, INP and TTFB tracked out of the box. Pinpoint the exact element causing slowness, including navigation type and load time.

AI Fix Suggestions

Don't just see the error — know how to fix it. Connect your GitHub repo and Claude reads your actual source code to give you a real fix.

Why not just use Sentry?

Sentry is powerful — and that's the problem. You want errors fixed, not a second job managing dashboards.

Sentry / others
Ultron
✕ Complex setup with source maps, releases, DSN config
3 lines of code, live in 60 seconds
✕ 50–200kb SDK that slows your app
Lightweight bundle, minimal overhead
✕ Alerts with no guidance
AI fix suggestions tied to your source code
✕ $26–$80+/mo for small teams
Simple, affordable pricing
✕ Overwhelming UI built for enterprise
Clean dashboard built for developers
✕ JS errors only (or pay more)
Errors + network + vitals in one

From zero to monitored in 3 steps

1

Install the package

One npm install. Works with Next.js, React, Vue, SvelteKit, and plain JavaScript.

npm install @ultron-dev/tracker
2

Add 3 lines to your app

Call initTracker once at startup. No config files, no build steps, no source map uploads.

initTracker({ apiKey: '...' })
3

Watch errors roll in (and get fixed)

Open your dashboard. See errors in real time with device, session, and network context. Hit "Fix" and let AI do the thinking.

Start catching bugs today.

Free to start. No credit card. No complex setup.
Just paste 3 lines and know the moment something breaks.

Get started free