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Privacy Policy


This privacy policy is applicable to the Add Letter (Website and Application, available on Google Play Store and Apple App Store) henceforth referred to as the ‘App’), managed by DeviationApps (referred to as Add Letter App or we).

We urge you to carefully read this Privacy Policy, as it outlines the usage of your personal data and your rights. This policy complements the Terms of Use or other documents or notices referencing this Privacy Policy.

If you have any questions, suggestions or complaints, feel free to reach out to [email protected]

Legal Context

We adhere to the guidance of relevant authorities and maintain an organizational structure to ensure compliance with the legal framework set by the General Data Protection Regulation (EU) 2016/679 (GDPR) and any other applicable laws regarding personal information.

Types of Personal Information Processed

We only collect and process personal information that is necessary, ensuring its accuracy and updating it when required. Such information include – email address, name, cookies, audience metrics etc. 

Collecting this information might be mandatory for service provision or optional to enhance user experience. Mandatory data will be clearly indicated during collection. Refusal to provide such information might prevent Add Letter App from delivering optimal service, possibly leading to inconveniences.

We process your personal information only for purposes compatible with the original reasons for collection. We collect and process personal information for specific, explicit, and legitimate purposes, such as:

  1. Creating and Managing your Add Letter Account.
  2. Fraud Prevention and to Track and Debug Errors 
  3. To Manage Senders (Newsletter Subscriptions)

We determine the legal basis for each processing activity on a case-by-case basis, in alignment with Article 6 of the GDPR, ensuring lawfulness.

Your data will not be processed or subjected to automated decision-making without your knowledge, nor will it be sold or rented without your explicit consent.

Access to Personal Information

Selected recipients have access to your personal information for legitimate reasons, particularly for conducting our business and providing quality service:

  1. Google Analytics (To Track Product Analytics)
  2. Google Cloud and Firebase (for Cloud Infrastructure)
  3. Brevo (for newsletter service)

Some recipients are regarded as our data processors as per Article 28 of the GDPR, ensuring they handle personal information appropriately and provide necessary protections.

Other recipients are authorized third parties under Article 4 of the GDPR, requiring us to share your personal information to comply with legal obligations and processes (e.g., subpoenas, requests from government or tax authorities).

As a data controller, we determine the retention periods of your personal information based on the collection purposes and our legal obligations.

As a data processor, we store personal information of our customers’ end users as per our terms and conditions and the duration of the services subscribed to by our customers.

Once these purposes are achieved or upon your request, your personal information is archived, deleted, or anonymized.

Protection of Personal Information

We highly prioritize the security of your personal information and implement adequate technical and organizational measures to safeguard its confidentiality, integrity, and availability.

We carefully consider the potential risks to your rights and freedoms and adhere to the advice of competent authorities regarding security.

Your Rights and Exercise Thereof

Under Articles 12 to 23 of the GDPR, you have rights over your personal information, which we are committed to respecting:

  • You may request access to and a copy of your personal information.
  • You can ask for modifications to your personal information if it’s outdated, inaccurate, or incomplete.
  • You may object to the processing of your personal information under certain circumstances, if based on our legitimate interest.
  • You can request restricted processing for a limited time under specific circumstances.
  • You have the right to withdraw consent previously given, without affecting the lawfulness of prior processing.
  • Where technically feasible, you may request your personal information be sent to you or transferred to a third party.
  • You can request the deletion of your personal information if legal grounds apply.

Exercise these rights at any time by emailing [email protected]

Google API and Limited Use

Add Letter App utilizes Google APIs when you connect your Gmail mailbox with our app.

Our use of information from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements.

We strictly comply with all conditions specified in Google’s limited use policy, including:

  • Not allowing humans to read user data without explicit user agreement for specific messages, files, or other data.
  • Not using or transferring data for ads, including retargeting, personalized, or interest-based advertising.
  • Limiting data use to providing or improving user-facing features prominently in the app’s user interface. All other uses are prohibited.
  • Only transferring data to others if necessary for providing or improving user-facing features prominently in the app’s user interface.


Children’s Privacy

Our Services are not intended for children under 13 years old. If we learn that we have collected Personal Data from children without parental consent verification, we will take steps to remove that information from our servers.

Policy Changes

We may update this Privacy Policy to reflect legal and regulatory developments. You will be informed of any changes either through a special mention on this page or a personalized notification, such as an email.

Contact Us

For any questions regarding this Privacy Policy, please contact us via email at [email protected].