What camera app to use to get decent pic of faint positive hpt

LumpySpacePrincess • SAHM to 3 very cheeky monkeys.
I've got a HTC one m8 and although the standard camera is great for most things I can't get any pics of my positive result to show clearly. It's either too blury or you can't see the faint line (it's def there IRL). What app should I downloaded to help me get a clearer pic?