San Diego startup Callergy (https://callergy.co) is a simple tool for allergy sufferers. Its digital allergy calendars show the major allergens in the air in cities across an entire year. The web tool also gives monthly allergy forecasts and handpicks a product that is tailored for that city's allergens. The startup has just had success on early adopter site ProductHunt. The company's goal is to alleviate allergy symptoms in people and make them live healthier and happier lives.