Not even close
Useless
Response from developer
Sorry to hear you are not happy with the app. Please note that accuracy of the count result is mainly dependent on the similarity of the counted items. If the items do not appear sufficiently similar in an image, then accuracy may be reduced. If you can send us example images you were using, we will work to improve the counting algorithm. Nevertheless, if you are unhappy with the app, please obtain a refund from Apple.
Not absolutely perfect but pretty neat.
Response from developer
Thank you! We're glad the app is useful for you. In addition to Calibration after counting, there is also the Edit option. By choosing "Edit", you can quickly add items to the count result that the app may have omitted, or remove items that shouldn't have been counted. When editing, simply touch an unmarked item to add it to the count result, or touch a marked item to remove it from the count result.
Horrible
Response from developer
Sorry to hear you are not happy with the app. The available technology is not yet mature enough to guarantee 100% accuracy in all circumstances. Accuracy of the count result is mainly dependent on the similarity of the counted items. If you can send us example images you were using, we will work to improve the counting algorithm. Nevertheless, if you are unhappy with the app, please obtain a refund from Apple.