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A question about your second line, a purchase, or your account? Get in touch with the DuoNumber team.
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For calls, SMS, numbers, credits, purchases, or feedback, email our team. Mention DuoNumber in the subject so we can route your message.
Email supportsupport@duonumber.appOur company
CALORIE COUNTER APP LIMITEDThe Leadenhall Building, 122 Leadenhall Street
London, England, EC3V 4AB
United Kingdom
support@duonumber.app
Help us understand the issue
Include your app version, iPhone model, iOS version, what happened, and any error message. For call or SMS issues, include the approximate time with time zone, destination country, and whether the issue affects incoming or outgoing communications. Mask phone numbers and private content in screenshots.
For a purchase issue, describe the purchase and date. We may request the relevant Apple receipt if needed. Never send your password, PIN, verification codes, or full payment-card information.
Privacy and account requests
Use DuoNumber privacy request as the email subject if you need help accessing, correcting, or deleting your information. See our Privacy Policy for details.
Subscriptions and refunds
Apple manages App Store subscription cancellation and refund decisions. Our Support page explains how to manage subscriptions, request a refund, and resolve common service issues.
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