Privacy Policy

This policy explains what information DuoNumber collects, why, who we share it with, how long we keep it and the choices you have. DuoNumber is an iPhone app that gives you a second phone number for calls and text messages.

1. Who we are

DuoNumber is provided by Calorie Counter App Limited, The Leadenhall Building, 122 Leadenhall Street, London, England, EC3V 4AB, United Kingdom ("we", "us"). If you have a question about this policy or your information, email support@duonumber.app.

2. Information we collect

Your account

• An account identifier. When you first open the app we create a guest account with a random identifier, so you can try the app without signing in.
• Sign-in details. If you sign in with Apple, Google or email, we receive your email address and an identifier from that sign-in provider. With Google, our sign-in service may also receive the name and profile photo on your Google account; the app does not use them. With email sign-in, your password is handled by our sign-in provider (Google Firebase); we never see it. If Apple shares your name with us, we do not use it.
• Support requests. When you email us from the app, the email includes your account identifier, so we can find your account.

Your phone numbers, calls and texts

• The numbers you rent, their country, the label you give them, and their renewal dates.
• Call records: for each call, your number, the other person's number, when it happened, whether it was answered or missed, and how long it lasted. We use these for your call history and for billing.
• Text messages: the full text of the messages you send and receive, the numbers involved, the time and the delivery status. We store them so your conversations appear in the app. When you delete a conversation in the app, it is hidden from you, but the messages remain on our servers until your account is deleted.
• We do not record, listen to or transcribe your calls, and DuoNumber has no voicemail. Call audio passes through our phone-service partners only to connect the call.

Purchases and credits

• Purchase details from the App Store: the product you bought, its price, currency and country, and the App Store receipt that proves the purchase. Apple handles your payment. We never receive your card or bank details.
• Your credit balance and what your credits were spent on (calls, texts, number rentals).

Your device

• A random install identifier created by the app, with your iOS version, app version and the region set on your phone. We use it to give each phone one free trial and to understand where the app is installed.
• Notification tokens that let us send message alerts, missed-call alerts and account reminders, and that let incoming calls ring on your phone.
• Your settings: your app language and your notification choices.

How you use the app

• Usage analytics. We record which screens you open and which actions you take (for example, starting a call, sending a text or making a purchase, with the product and price), linked to your account identifier. These records do not contain phone numbers or message text.
• Crash and error reports. When something goes wrong we receive a technical report linked to your account identifier. The app tries to mask email addresses and phone numbers before a report leaves your phone. Reports from our servers may contain technical details of the request that failed.
• Technical data. Like any online service, our servers and partners receive your IP address and basic device information (such as the phone model and iOS version) when the app connects to them.

Advertising attribution

• If you came to DuoNumber from an ad on the App Store (Apple Search Ads), we receive information about that ad campaign from Apple (such as the campaign, ad group and keyword). We request it only after you have answered the app's tracking question, and we store it with your install and purchase records.
• If you allow tracking, our analytics tools may also use your phone's advertising identifier. If you do not allow it, they don't. You can change this at any time in iOS Settings > Privacy & Security > Tracking.

3. Information that stays on your phone

• Contacts. If you allow it, the app reads your contacts on your phone so you can call or text them and see their names in your call history, messages and message alerts. Your contacts are not sent to us.
• Your PIN and Face ID. If you turn on the PIN lock, your PIN is stored only on your phone, in a protected form. Face ID is handled entirely by iOS: the app only learns whether unlocking succeeded and never receives your biometric data.
• The microphone is used only during calls, to carry your voice to the person you are speaking with.

4. How we use your information

We use your information to:

• provide the service: rent you numbers, connect your calls and deliver your texts;
• manage your account, purchases, credits and number renewals;
• send you the alerts and reminders you have chosen to receive;
• prevent fraud and abuse, for example by limiting the free trial to one per phone and limiting how many messages can be sent;
• answer your support requests;
• understand how the app is used, fix problems and improve DuoNumber;
• measure which of our ads bring people to the app.

We do not sell your personal information.

5. Who we share it with

We share information only with the companies that help us run DuoNumber, and only what each needs to do its job:

We may also disclose information when the law requires it, to protect the rights and safety of our users or others, or as part of a sale or reorganisation of our business, in which case this policy will continue to apply.

Website contact form

When you use the contact form on our website, Formspark processes your name, email address and message to deliver your request to our team. We use this information to respond to you. Formspark also processes technical request information, such as your IP address and browser information, to operate the form and filter spam. See Formspark’s Privacy Policy for its privacy practices. Please do not include passwords, PINs or verification codes in your message.

6. Where your information is stored

Our servers and database are in the United States (Google Cloud). Our partners may process information in other countries. Wherever it is processed, we require it to be protected.

7. Security

Information travels between the app and our servers over encrypted connections. Requests from the app are checked to confirm they come from the genuine app, messages from our phone-service partners and Apple are verified by their signatures, the login details your phone uses to make calls are kept in the iPhone's secure storage (Keychain), and access to our systems is restricted. No system is completely secure, but we work to protect your information.

8. How long we keep it, and deleting your account

We keep your information while your account exists. You can delete your account at any time in the app, under Settings > Delete account. When you do:

• your numbers are released, and you cannot get them back;
• your messages and conversations, your numbers list, your settings and your sign-in are deleted;
• your call history is erased from your account.

The deletion usually finishes on our servers within a day or two. It can take longer if a phone company is slow to release one of your numbers.

Some records are kept after deletion, as long as needed for accounting, legal, tax and fraud-prevention purposes. They stay under your random account identifier, which is no longer connected to your sign-in, email address or name:

• purchase and billing records: what was bought, your credit balance, and the charges for each call and text, including the phone numbers and times involved;
• records of individual calls and incoming texts (phone numbers, times, durations), without the message text;
• in some cases, a record of a number you rented, so it is not passed on to someone else too soon;
• a record that your phone has used its free trial;
• your install record (install identifier, device and app version, region, ad attribution);
• your phone's notification-token records, no longer linked to any account, and your disabled calling login;
• a record that the account was deleted.

Short-lived technical records used to connect a call expire after 24 hours and are removed automatically shortly after.

Deleting your account does not cancel your App Store subscription. Cancel it in iOS Settings > [your name] > Subscriptions, where the app also links.

9. Your choices and rights

• Access, correction and deletion. You can ask us for a copy of your information, ask us to correct it, or ask us to delete it, by emailing support@duonumber.app. You can also delete your account directly in the app.
• Notifications. Turn each kind of alert on or off in Settings > Notifications, or turn them all off in iOS Settings.
• Tracking, contacts and microphone. Change these at any time in iOS Settings. Without microphone access, calls cannot work; without contacts access, you can still dial numbers by hand.
• Depending on where you live, you may have further rights under local law, such as objecting to some uses of your information or complaining to a data-protection authority. Contact us and we will help.

10. Children

DuoNumber is not intended for anyone under 16. We do not knowingly collect information from children. If you believe a child has given us information, contact us and we will delete it.

11. Emergency calls

DuoNumber cannot be used to call emergency services. Use your phone's regular calling for emergencies.

12. Changes to this policy

We may update this policy. When we do, we will change the effective date above, and for significant changes we will let you know, for example in the app or by email.

13. Contact