Viking Shop review for Shipping Tracker

Total disappointment. This app is no longer what it used to be. You pay for a service that only works halfway: 3/4 of my tracking numbers are not even traceable. Every time, the same message: 'Shipping tracker was not able to determine your shipping carrier for this tracking code, please check contact support.' And the support? It's incredibly slow, and their responses don’t offer any real solutions. No updates to fix the problem or to add major carriers. I no longer recommend this app; it has become unusable.