HotStock is a free app developed by Litebox Ltd, available exclusively on iPhone. The app tracks the stock and price of hard-to-get products in real-time, notifying you when they become available again. The products range from the latest gaming consoles like PlayStation 5 (PS5) and Xbox Series X to popular toys like Squishmallows and LEGO sets.

With HotStock, you can easily add custom products to your watch list and receive instant notifications when they are back in stock. The app saves you the hassle of constantly checking different retailers' websites for product availability. You can also compare prices and quickly purchase before the products go out of stock again.

HotStock offers a premium tier subscription, which allows you to add up to 10 custom products to your watch list and receive alerts about new stock before non-subscribers. The cost of the subscription is displayed in the app before your agreement, and it automatically renews monthly. You can turn off auto-renewal in your iTunes Account Settings.

In conclusion, HotStock is a must-have app for anyone looking to buy hard-to-get products. Its real-time tracking and instant notifications save you time and help you secure those must-have items before they sell out again.