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Added August 18, 2026

uChecker

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About the product

uChecker verifies bulk email lists and keeps the SMTP reply for every address. Upload a .txt or .csv, up to 9 million addresses a job, about 3200 a minute. Results: Good, Bad, Risk, Unknown. Unknown is never counted as valid. Thirteen free DNS tools sit on the same site: SPF, DKIM, DMARC, MX, plus generators.
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For product owners

Promote uChecker

Every listing gets one post to our X and Threads followers. It is seen once, then the traffic stops. Promotion keeps uChecker in front of people instead.

  • Back in the X and Threads rotation. uChecker gets posted again instead of once.
  • A promoted slot on the AppRater homepage, carrying a Promoted badge.
  • A labelled spot in the weekly email to AppRater subscribers, one promoted app per issue.
  • Stays on the first screen however old the listing is, while new submissions push everything else down.

Quarterly promotion

$35USD every 3 months

Card, Apple Pay and more, through Whop. Starts straight away.

  • Cancel any time from the Whop account you paid with, or email [email protected] and we will do it.
  • The promotion starts straight away, no waiting on us.
  • Whop handles the checkout. We never see your card.

Questions first? Email [email protected].

For ownersOwn uChecker? Add a deal or post a role, and it shows up right here.

Add a deal →Post a role →

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