Why do you think there's no smartphone app? Here's one for the iPhones: https://apps.apple.com/us/app/pregnancy-test-checker/id854689871 https://apps.apple.com

Why do you think there's no smartphone app? Here's one for the iPhones: https://apps.apple.com/us/app/pregnancy-test-checker/id854689871 https://apps.apple.com/us/app/pregnancy-test-checker/id85468... Here's one for the Androids: https://play.google.com/store/apps/details?id=com.churchdwight.firstresponse https://play.google.com/store/apps/details?id=com.churchdwig... And if you read some reviews, you can see that the challenge is not trivial.