A rectangular grid has been filled with a mixture of magnets (that is, dominoes with one positive end and one negative end) and blank dominoes (that is, dominoes with two neutral poles). These dominoes are initially only seen in silhouette. Around the grid are placed a number of clues indicating the number of positive and negative poles contained in certain columns and rows.
Your aim is to correctly place the magnets and blank dominoes such that all the clues are satisfied, with the additional constraint that no two similar magnetic poles may be orthogonally adjacent (since they repel). Neutral poles do not repel, and can be adjacent to any other pole.
This app is integrated with Alphonso software. Subject to your permission, the Alphonso software receives short duration audio samples from the microphone on your device. The audio samples never leave your device, but are irreversibly encoded (hashed) into digital "fingerprints." The fingerprints are compared off-device to commercial content (e.g., TV, OTT programming, ads music etc.). If a match is found, then appropriate recommendation for content or ads may be delivered to your mobile device. The Alphonso software only matches against known audio content and does not recognize or understand human conversations or other sounds.