Stackz is now available for free in the App Store!
The free version includes all the proven core features of the iOS app iStackz, such as testing, learning, color modes, text-to-speech, and access to the online word list archive. The Apple Watch version is also included in the free app.
(https://www.stackz.com/wp/wp-content/uploads/2026/01/iStackz-1-Series9-45-2-bluelarge.png)
Download link (https://www.stackz.com/product/istackz-ios/)
However, there are some limitations in the free version:
* No more than 20 test and learning actions per day
* No more than one custom font
* No more than three cards are downloaded to the Apple Watch
Full functionality and additional premium features are available with a subscription for only $1.99 per month. The only premium feature currently available only with a subscription is text recognition using the camera to capture new input text.
Previous purchases are recognized in the app and unlock the full range of features, just like a subscription.
NOTE: In some cases, licenses previously purchased from the App Store are not recognized correctly by the new app version. If you have purchased the app before and see the message "You are using the free version" on the "Update License" screen, please send us a message so we can find a solution.