If lactose is present in the sample, the strip will change colour, with a greater level of change indicating a higher concentration of the sugar, commonly found in milk. A sensor in the device processes this information.
Adams has also designed an app to accompany the Ally device, which connects to the user’s phone via Bluetooth. The user pushes a button in the middle of the device to begin the test, which the app takes 60 seconds to process.
The test results appear in the app, but if the user would prefer to not look at their phone at the table, Ally also gives off a quick vibration to signal a positive or negative result.
The user has the additional ability to log their results in the app, share them with an online community, and leave reviews about how allergy-friendly certain restaurants are.