Manifest V3 Compliant • 100% On-Device Privacy

The automatic shield against subscription traps.

TrialGuard silently scans web pages to detect $0 free trials and sneaky $1 intro promos — setting automated reminders before your card gets billed.

Add to Chrome — It's Free Upgrade to Pro ($4.99)

4.9/5 · 1,200+ reviews

No credit card required

streamingpass.com/checkout

TrialGuard detected a Free Trial for streamingpass.com!

STREAMINGPASS · PREMIUM PLAN

$0.00 today

then $19.99/mo after trial ends. Cancel anytime.

Start Free Trial

Live simulation — no real page is visited or modified.

The problem with memory

Why manual tracking fails

A calendar reminder only works if you remembered to set it, and it can't see the fine print. TrialGuard reads the actual page, every time.

Capability	Manual Calendar Reminders	TrialGuard Automated Shield
Catches hidden $1 intro-rate increases	Misses them — no one calendars a price change buried in the terms	Auto-scans the page DOM for intro-pricing language
1-click cancellation links	Search through email receipts and account settings	Direct link to the signup page saved with the reminder
Local privacy	Usually requires syncing to an external calendar account	100% local storage — nothing leaves your browser

Under the hood

Built like security software, because it is

Reads the page like a person would

TrialGuard scores checkout and pricing pages against two independent signatures: a $0 free-trial pattern ("start free trial," "7-day free trial") and an intro-promo pattern ("$1 for your first month," "50% off for 30 days," "renews automatically at $29.99"). It only alerts once it's confident — no noise on pages that just mention pricing.

Detects duration automatically (7, 14, 30+ days)
Extracts intro price → renewal price pairs
Works on single-page apps, not just static checkouts

Signals matched

"7-day free trial" STRONG

"cancel anytime" SUPPORTING

Classification: FREE_TRIAL

Pricing

Pay once. Guarded forever.

No subscriptions here — that would be a little ironic.

Free

$0 forever

Everything you need to stop the most common surprise charges.

Up to 3 active tracked trials/promos
Automatic free-trial detection
Native desktop alerts
100% local, on-device storage

Add to Chrome — Free

Popular Choice

Pro · Lifetime Access

$4.99 one-time

One payment. No renewal. Ever.

Unlimited active trial & promo tracking
Intro-promo detection ($1 trials, % off)
Custom notification schedules
Priority support

Zero data collection

TrialGuard executes scripts locally on your device. We do not track your browsing history, sell data to third parties, or touch your financial credentials — the extension never even sees them. Everything it tracks lives in chrome.storage.local, on your machine only.

Manifest V3 No remote code No account required

FAQ

Questions, answered plainly

After checkout, you'll get a key formatted like TGPRO-XXXXX-XXXXX-XX. Open the extension popup, go to Settings → TrialGuard Pro, paste the key, and click Verify. Pro unlocks instantly — no restart needed.

Any Chromium-based browser that supports Manifest V3 — Chrome, Brave, Edge, and Opera all work. Firefox support is on the roadmap.

No. TrialGuard only reads visible page text to look for trial and pricing language — it never touches payment forms, passwords, or account data. There's no TrialGuard server for that information to travel to.

TrialGuard shows an upgrade prompt instead of silently dropping the new trial — your existing 3 keep being tracked either way. A one-time $4.99 Pro purchase removes the limit permanently.

Yes — reach out within 14 days of purchase and we'll refund it, no questions asked. Support is available through the Chrome Web Store listing.

Stop guessing when trials end.

Install TrialGuard in under 10 seconds. It starts watching the moment you land on a checkout page.

Add to Chrome — It's Free