A Chrome extension for serial trial-forgetters
Never get charged for a free trial you forgot.
TrialGuard spots trial offers on checkout pages — even when the terms are baked into an image — and warns you 24 hours before the first charge. Cancel in time, and it keeps score of every dollar you didn't spend.
No account · No analytics · Your data never leaves the browser
How it works
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01
It reads the checkout
Trial terms hide in strange places: hero images, embedded Stripe forms, six-point gray text. TrialGuard scans all of it — page text, text inside images via on-device OCR, even payment iframes — and offers to track the trial in one click.
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02
It remembers the terms
Service, end date, and the price after the trial — stored only in your browser. No trial mentioned on the page at all? Right-click and set one manually; known services get their usual trial length prefilled.
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03
It warns you in time
A notification 24 hours before the first charge, a toolbar badge for anything expiring within 48 hours, and one click straight to the service's own cancellation page — not a support maze.
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04
It keeps score
Every trial cancelled in time adds its price to your savings counter. The number in the popup is the whole pitch: it should always be bigger than what Pro costs.
Pricing
Free
$0
- Track up to 3 active trials
- Full detection — text, images, payment forms
- Reminders & cancel-page shortcuts
- Savings counter
Pro
$20/year
- Unlimited tracked trials
- Everything in Free
- Up to 3 devices
- Priority support
Payments by Lemon Squeezy. Cancel anytime, keep Pro until the period ends.
No account. No analytics. No servers.
The only thing this extension uploads is nothing.
FAQ
Where is my data stored?
Entirely in your browser's local storage. We run no servers for the extension's core features and collect no analytics. The one network call the extension ever makes is validating a Pro license key with our payment provider. Details in the privacy policy.
Does it work on every website?
TrialGuard detects most English-language trial offers — in page text, images, and embedded payment forms — and you can track any trial manually via right-click or the popup. No detector is perfect, which is why the banner always shows you the detected date before tracking.
How do refunds work?
Email us within 14 days of purchase for a full, no-questions refund. Details on the refund policy page.
How do I cancel Pro?
Anytime, from the "Manage subscription" link in your Lemon Squeezy purchase email. You keep Pro until the paid period ends.