Let Me Know When
Monitor any website for free with Let Me Know When. Get email or slack alerts on price changes, competitor updates, stock availability, events, and more.
Our verdict
Let Me Know When describes itself as Monitor any website for free with Let Me Know When. Get email or slack alerts on price changes, competitor updates, stock availability, events, and more. It offers a free trial. Public pricing lists 3 plans. We do not republish the figures until a person has checked them, so follow the pricing link for current numbers. Developer documentation is published. A public changelog is maintained, which is a useful sign the product is actively worked on. Our score of 8.2 out of 10 comes from a desk review against the published rubric, recorded 2026-09-01.
Pricing
- Free tierNo
- Free trial14 days
- Public price listYes
We do not republish prices we have not checked by hand, because automated price extraction proved unreliable enough to mislead. The vendor’s own page has the current figures. Why we do this
View pricing on letmeknowwhen.appUser reviews
No one has reviewed Let Me Know When here yet. Reviews are moderated before they appear, and our own score is editorial and separate from user ratings, though once reviews land they do lift it.
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Side by side
| Tool | Our score | From | Free tier | Best for | |
|---|---|---|---|---|---|
| Let Me Know When this page | 7 | - | - | ||
| 🥇Aiter | 8.5 | - | Yes | ||
| 🥈Mails.ai | 8.3 | - | Yes | ||
| 🥉Speak Ai | 8.3 | - | Yes | ||
| RewriteBar | 8 | - | Yes | ||
| InsertChatGPT | 7.9 | - | Yes | ||
| Saga | 7.9 | - | Yes |
Questions
Is Let Me Know When free?
There is no free tier, but Let Me Know When offers a free trial.
How much does Let Me Know When cost?
Let Me Know When publishes pricing on its own site, listing 3 plans. We deliberately do not republish prices we have not verified by hand, because automated price extraction proved unreliable enough to mislead. Use the link on this page for current figures.
Does Let Me Know When have an API or developer docs?
Yes, Let Me Know When publishes developer documentation.
How is Let Me Know When scored here?
Let Me Know When scores 8.2 out of 10. That comes from a desk review of public evidence, which is capped at 8.5 out of 10: public pricing, documentation, maintenance signals and how much we could actually verify. Affiliate relationships are excluded from scoring entirely. The full rubric is published on our methodology page.