Synesthesia is an interesting trait occurring in about 4% of the general population. For people with synesthesia two or more senses appear to be interconnected; for example someone with synesthesia perceives certain concepts, such as letters or numbers, as inherently colored. This app contains four playful quizzes to find out whether you may have this type of synesthesia, i.e. for letters and numbers, days of the week, or months. If you take the fourth longer test for letters & numbers you can directly apply for genetic studies at the Max Planck Institute for Psycholinguistics. SynQuiz is available for free in the App Store and in the Google Play Store.
Platforms: iOS and Android (smartphones and tablets), web.
Support: check the Frequently Asked Questions first.