Terms

Last updated October 23, 2026.

The free tools

• The instant check is a prediction from patterns in our tests, not a guarantee of where Gmail will put your email.
• Previews are written from what you tell us. Check facts before you send anything: you are responsible for what you send.
• There are daily limits so the tools stay free for everyone.

Using them fairly

• Don't paste other people's personal data or anything confidential.
• Don't use Inbox Tuner to write spam, phishing or misleading emails, or emails to people who didn't sign up to hear from you. Follow the email laws that apply to you (such as CAN-SPAM or GDPR).
• When you base a sequence on someone else's, we reuse its structure and timing, never its wording.

The emails we write for you

They're yours to use and change as you like.

The full version

Each package (one email, a short sequence or a full sequence) has a one-time price shown on the site when you buy, and includes a set number of changes and re-tests within 30 days, as listed on the pricing. Every package comes with a 30-day money-back guarantee, no questions asked. Reserving the founding price costs nothing and commits you to nothing.

Other

Inbox Tuner is not affiliated with Google. Gmail is a trademark of Google LLC. Questions: contact us.