Deeper baseline: last 10 sessions + Health verdict
Spike & drift detection with severity badges
Cross-session regression verdict (robust z-score)
Session deep-dive: Compared to last 9
Project history trend charts with annotated anomalies
Launch-phase segmentation & analysis
Custom alerts: spike, drift & regression
The math behind Pro
Real statistical methods. Not vibes, not "AI-powered."
The same family of tools sysadmins have trusted for decades. No black boxes, no proprietary scoring.
Spike detection
score = MAD × 1.4826 (scaled MAD-z)
Catches sudden departures from steady-state. The 1.4826 scale makes MAD comparable to stddev — same 3σ convention every analyst already uses.
3σ threshold · rolling 60 samples
Memory drift
Shigh(i) = max(0, Shigh(i-1) + (xi − μ − k))
One-sided CUSUM. Wakes up on slow leaks no single sample ever reveals. Welford warm-up estimates the target + sigma before the alarm arms.
Welford warm-up · 60 samples
Cross-session regression
Theil–Sen line + robust z-score
Fits a robust trend through prior runs (handles natural project growth), scores the latest against the residuals. Sign-aware, Bonferroni-capped — only the worst-deviating metric fires.
≥ 5 sessions required
Baseline
median + scaled MAD (not mean + stddev)
Per-metric weighted score: RAM 1.5× · CPU 1.0× · Disk 0.7× · Net 0.5×. Improvements never count toward a regression.
outlier-robust by design
Full comparison
Free vs Pro, side by side.
Every feature, no surprises in the small print.
Capability
Free
Pro
Live CPU / RAM / disk / network charts
Floating mini monitor
Hard CPU & RAM caps
Stack auto-detection & Git overview
Session history per project
5 sessions
Unlimited
Project History trend charts
Baseline analysis
Last 3 sessions
Last 10 + Health verdict
Spike detection (scaled MAD-z)
Memory drift detection (CUSUM)
Cross-session regression verdict
Session deep-dive (Compared to last 9)
Launch-phase segmentation & analysis
Bell notifications
Peak alerts (CPU 80%+ sustained)
Custom alerts (spike, drift, regression)
Anonymized industry benchmarks
Coming soon
Cloud sync across machines
Coming soon
Pricing questions
Anything else?
Can I cancel any time?
Yes. Cancel from your Account → Billing page. Your Pro features stay on until the end of the period you already paid for, then quietly revert to Free.
Do you offer refunds?
Yes — 14-day refund, no questions asked, on your first payment. Contact us from the same address you registered with.
What happens to my data if I downgrade?
Nothing is deleted. Once you’re back on Free, only the most recent 5 sessions per project stay visible in the UI; older sessions are retained and become visible again the moment you re-upgrade.
Do you offer team plans?
Not in v1. Pro is per-developer for now. A team SKU with shared regression context is on the roadmap if there’s demand.
What payment methods are accepted?
Card payments via Stripe (Visa, Mastercard, American Express). Integration is being finalised — check back when you see the Subscribe button go live, or sign up now and we’ll email you when payment is wired in.