Privacy Policy Statement (SDK Partners)


This Privacy Policy describes how we, Opensignal Limited ("Opensignal", "we," "us" or "our"), collect, use, and share your personal data when you allow us access to your data in connection with your use of a mobile application operated by one of our partners (“Partner”).

We request access to your reception data (and some additional data relating to you or your device) in order to measure the availability and signal quality of communication networks (“our Services”). 

Opensignal is responsible for the control and processing of personal data that we collect from your device. If you have any questions or concerns about Opensignal’s use of your personal data, please contact us at [email protected]

The purpose of this Policy is to inform you about our privacy practices and to ensure that you understand the purposes for which we collect and process your personal data. The following is a brief summary of the manner and purposes for which we process your personal data.

Our mission is to analyze and review the availability, service coverage, performance and signal quality of numerous mobile networks all over the world. We obtain the relevant data by collecting measurements relating to signal reception and quality from users of mobile devices.



When allowed access to your data, we collect data from your mobile device both when you are using our Partner’s app and when it is closed.

We take repeated measurements from your device from time to time including location data (which include GPS coordinates or similar information regarding the location of your device), network type, network operator, cellular and Wifi signal strength and quality, and the identifiers of connected cell towers and Wifi routers (including both BSSID and SSID). We also measure how data is flowing, both passively (by monitoring how fast it moves through other apps), and actively (by running a test that downloads or uploads data within our SDK). We do not monitor the content of your data usage. The goal of collecting the above data is to measure the experience you have of wireless networks.

We also collect information from environmental sensors on your device (depending on which ones are integrated in your device), this allows us to measure things such as the device acceleration, orientation and the external atmospheric pressure and light intensity. We also measure some internal device conditions – such as battery temperature and voltage. The goal of collecting this data is to understand how instantaneous device conditions affect experience of mobile networks.

To better understand differences between devices, we collect data on your device hardware such as the model, manufacturer, and manufacturers and models of sub-components (such as the cellular radio) and the capabilities of these components (for example the number of cores on the CPU). Similarly, to understand differences caused by software, we collect information on the mobile platform version used and whether custom ROMs or Android skins are installed. The goal of collecting this data is to understand how device properties affect experience of mobile networks.

When you first use our Partner’s app a random identification code is generated by our software and allocated to your mobile device and used to identify your device whenever we take measurements. To further help us manage the data, we also collect your public IP address, the device MAC number, the Android serial number. These fields are needed for statistical purposes, for example to understand how much data is contributed by each device.  


Measurements that we take from the mobile devices of individual network users allow us to create a detailed picture of the service availability, quality and performance of numerous communication networks across the world and over time. We publish some of the statistical data that we generate and we provide it to our customers (such as network operators) to help them understand their own network’s service coverage, performance and signal quality (and those of their competitors). Although the end-product we produce is made up of aggregated anonymized data, the underlying ‘raw data’ which contains personal data of individual users is important for us and our customers for generating statistical data, validating the results, quality control and further analysis.


We collect and process your personal data based on your express consent. If you give your consent for accessing your device data to take measurements, you can withdraw it through the personal settings on the Partner’s app. In respect of any personal data collected from your device with your consent we also rely on our legitimate interest in conducting our business and in carrying out statistical and scientific research work and in providing analytical data to our clients.


a. Joint Controllers. We share some of the raw measurements that we collect from users’ mobile devices with some of our customers under the terms of data license agreements and data sharing agreements. Some of the data we share with our customers contains personal data such as datasets containing location data of individual users. Our customers are permitted to use the data for the purpose of analyzing it and generating aggregated data relating to the performance of their networks or telecommunications equipment (and competing networks or equipment) and to use aggregated data in their sales activities. Our customers are not permitted to use your personal data to communicate with you or to influence you or to profile or track individual users. They are required to keep your personal data confidential and to use appropriate means to protect it. Our customers have access to data such as location data of users to enable them to analyze the data and create statistical information based on the aggregation of data from numerous users. Our customers that receive such data from us are not permitted to disclose any datasets that contain personal data relating to specific individuals to their own customers or any third parties. 

b. Our Partner. We obtain access to data from your mobile device through software incorporated in our Partner’s mobile application which you download onto your device. However, we do not share with our Partner any of the data we collect from your device. 

c. Service Providers. We may share datasets containing your personal data with third-party service providers that perform services on our behalf in connection with our Services, such as cloud service providers we may use or third-party analytical service providers. Where your information is shared with such third parties, we ensure that the third-party service provider will deal with your information only on our behalf and on our written instructions and solely for our benefit (and not for its own benefit). 

d. Business Change. If we become involved in a merger, consolidation, acquisition, sale of assets, joint venture, securities offering, bankruptcy, reorganization, liquidation, dissolution or other transaction, or if the ownership of all or substantially all of our business otherwise changes, we may share or transfer databases containing personal data of users to successor party or parties in connection with such transaction or change in ownership or legal structure.

e. Necessary Disclosure. Regardless of the choices you make regarding your information and to the extent permitted or required by applicable law, we may disclose information about you to third parties to: (i) enforce or apply the terms and conditions of our Services; (ii) comply with laws, subpoenas, warrants, court orders, legal processes or requests of government or law enforcement officials; (iii) protect our rights, reputation, safety or property, or that of our users or others; (iv) protect against legal liability; (v) establish or exercise our rights to defend against legal claims; or (vi) investigate, prevent or take action regarding known or suspected illegal activities; fraud; our rights, reputation, safety or property, or those of our users or others; violation of the Terms of Use, our policies or agreements; or as otherwise required by law.


We take certain measures to protect personal data collected through the Service against loss, theft, and unauthorized access, use, disclosure, destruction or modification. These include physical, technological and administrative measures. 


Personal data (such as user’s location data or the user’s unique identifier which is created on first use of our Partner’s app) contained in the sets of measurements of mobile network signal performance is held for an unlimited period of time as it is required for the production of statistical data over different periods of time and to compare performance data between different time periods. 


We operate from the United Kingdom (UK) and our data collection and processing activities take place predominantly in the UK. We store and otherwise process data (including personal data) through third party cloud service providers and other IT service providers which may be located or which may operate in other countries, including countries which do not guarantee the same level of protection to privacy as the UK. Some of our customers to which we license data (see section 5(a) above) also receive personal data from us for processing in countries outside the UK or the EU. When transferring personal data records from the UK to a country outside the EU which does not provide an adequate level of protection to privacy rights, we put in place appropriate safeguards including data transfer agreements on the terms approved by the EU Commission. We may also obtain your consent for the transfer of your personal data for processing outside the EU. 


The Service is not directed to children and is intended for use by adults only. We do not knowingly collect personal data from individuals under 16 years of age. If you are under the age of 16, please do not submit any information through the Service and do not provide your consent for the use of your data unless your parent or guardian has approved. 



Data subjects have the following legal rights in respect of their personal data that we process:  

a. The right to require Opensignal to confirm whether or not your information is being processed, the purpose of any such processing, the recipients of any information that has been disclosed, the period for which your information is to be stored and whether any automated decision-making processes are used in relation to your information;

b. The right to require access to the personal data and to require Opensignal to rectify inaccurate information without undue delay.

c. Where Opensignal has relied on the ‘consent’ basis for processing that information (see paragraph 4 above), the right to withdraw your consent at any time. This right to withdraw consent does not affect the lawfulness of processing based on consent before its withdrawal;

d. The right to request the erasure of their information. You can make a request for erasure where:

i. the information is no longer necessary in relation to the purpose for which it was collected;

ii. where the processing of the information is based on your consent (and the other circumstances described in the ‘Legal Basis for Processing Your Data’ and ‘How We Share Your Information’ sections above no longer apply), if you withdraw your consent; or 

iii. where the personal data is processed by Opensignal solely on the basis of our ‘legitimate interest’ referred to in paragraph 4 (), if you withdraw your consent for the processing of your data and you object to the processing of your personal data and there are no overriding legitimate grounds for the processing (such as, for example, the achievement of the purpose of using your data for statistical or scientific research purposes or where the processing of the data is required to meet statutory obligations or for the defense of legal claims). 

Where Opensignal has disclosed your information of a data subject to a third party and you request the erasure or rectification of the data, Opensignal will take all reasonable steps to inform the third party of such request;

e. The right to require Opensignal to restrict its processing of your personal data in certain circumstances, such as where the accuracy of that data is disputed or an objection has been raised. In such circumstances, Opensignal will only process that information with your express consent, or for the establishment, exercise or defense of legal claims or for the protection of the rights of another natural or legal person or for reasons of important public interest;

f.  Where data is processed based on your consent or to fulfil a contractual obligation, you have the right to receive your personal data from Opensignal in a structured, commonly used and machine-readable format;

g. The right to object to the processing of personal data where:

i. Opensignal relies solely on the ‘legitimate interest’ basis for processing that data, in which case we will be legally required to stop processing your information unless we have compelling legitimate grounds for the processing which override your privacy rights and interests; or

ii. the information is used for direct marketing purposes, in which case we will immediately stop processing your information for such purposes;

h. You have the right to lodge a complaint with the UK’s Information Commissioner’s Office or in some cases with the data protection supervisory authority of the EU member state where you reside.

The above legal rights are subject to various conditions and exceptions including where the data is used for statistical or scientific research purposes and the exercise of the right would prevent such purposes from being attained or would seriously impair their attainment.


Under California Civil Code Section 1798.83, if you are a California resident and your business relationship with us is primarily for personal, family or household purposes, you may request certain data regarding our disclosure, if any, of information to third parties for the third parties' direct marketing purposes. To make such a request, please send an email to [email protected] with "Request for California Privacy information" in the subject line. You may make such a request up to once per calendar year. If applicable, we will provide to you via email a list of the categories of information disclosed to third parties for their direct marketing purposes during the immediately-preceding calendar year, along with the third parties' names and addresses. Please note that not all personal data sharing is covered by Section 1798.83's requirements.


This Policy relates to your personal data, i.e. data about you, an individual, from which you can be identified. This Policy therefore does not apply to any data insofar as it is held, processed, disclosed or published in a form which cannot be linked to a living individual (such as anonymized data, or aggregated data which cannot directly or indirectly be used to extract your personal data). We reserve the right to generate anonymized and aggregated data extracted out of any databases containing your personal data and to make use of any such anonymized and aggregated data as we see fit (including publishing such data and sharing it with third parties).


We may update this Policy from time to time, and the updated version of this Policy will be effective upon posting on the Opensignal Services. Please check this page to review the most up-to-date version of this Policy.


If you want to exercise your rights under paragraphs 10/11 of our privacy policy, please email [email protected] with “Data Subject Request” in the subject line, or contact us by mail addressed to:

Opensignal Limited
1st Floor
3 Angel Square
United Kingdom