Phototaxon’s development has been suspended, to allow a complete rethinking of the game purpose in light of the COVID-19 pandemic. From a personal, perhaps ego-centric, quest towards creativity, to a collective struggle against global challenges.

—Korn Seang Edouard Song

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Phototaxon is a photography exercise in creativity. It is a stubborn camera which only captures photos that satisfy certain requirements.

Privacy policy

This policy applies to all information collected or submitted on Phototaxon website and apps.

Information we collect

We collect aggregate, anonymous device and usage statistics to improve the app.

In particular, we collect anonymised information about the photos that have been succesfully captured and saved, allowing us to build a mathematical representation of how a given level has been solved on a regional-to-world scale. This collection is optional, and is disabled by default.

This information includes data used for validation and abuse mitigation purposes, and are either immediately discarded after processing or stored only for a temporary duration:

  • a low-resolution thumbnail of the photo to verify the submission integrity,
  • an IP address to detect and prevent repeated abuse attempts.

This information also contains data used to build the model and its parameters, and are anonymised on the app before submission:

  • an installation identifier (varying across installations, independent from the advertisement identifier),
  • app-related information (such as the client version),
  • a random photo identifier (generated on the app),
  • a 16-bit image fingerprint to allow comparison between photos,
  • a 5-character geohash to provide a approximate location of the photo (±2.4 km),
  • a normalized date and time (rounded to the nearest half-hour),
  • and various level-specific photo information (color statistics, angle…).

This information is reported asynchronously in batches.

Information usage

We use the information we collect to operate and improve our website, apps, and customer support.

We do not share personal information with outside parties except to the extent necessary to accomplish Phototaxon operation. We may share anonymous, aggregate statistics with outside parties.

We may disclose your information in response to subpoenas, court orders, or other legal requirements; to exercise our legal rights or defend against legal claims; to investigate, prevent, or take action regarding illegal activities, suspected fraud or abuse, violations of our policies; or to protect our rights and property.

In the future, we may sell to, buy, merge with, or partner with other businesses. In such transactions, user information may be among the transferred assets.


We have implemented commercially reasonable precautions to protect the information we collect from loss, misuse, and unauthorized access, disclosure, alteration, and destruction.

Third-party websites and services

Our website or apps may contain links to third-party websites, products and services. Any access to and use of such linked websites, products and services (“third parties”) is not governed by this policy, but instead is governed by the privacy policies of those third parties. We are not responsible for the information practices of such third parties. We encourage you to learn about the privacy practices of those third parties.

International transfers of information

Information may be processed, stored, and used outside of the country in which you are located. Data privacy laws vary across jurisdictions, and different laws may be applicable to your data depending on where it is processed, stored, or used.

Your consent

By using our website or apps, you consent to the present privacy policy.

Contact us

If you have questions about the privacy aspects of our services or would like to make a complaint, please contact us at: [email protected].

Changes to this policy

If we decide to change our privacy policy, we will mention those changes on this page.