Aw, first time using OPK strips can be confusing talaga! Para ma-sure, kailangan mo ng test line na darker or equal sa control line para ma-consider positive, if lighter lang ang test line, usually hindi pa siya positive, though some mums I know say their surge is subtle so they do multiple tests a day to catch it. Best to double-check with your doctor or a midwife kung confused ka pa rin with your results, para ma-guide ka properly on timing, lalo na if your app and the test seem off!