iPhone Screenshots


Stacks is the intelligent smart cards app. Whether you're learning a new language, practicing math or expanding your vocabulary with the word of the day. Stacks enhances your learning experience by utilizing intelligent algorithms to increase the challenge as you work towards mastery of each card.

Great support for:
- Learning new languages
- Learning new words and definitions

Increases difficulty as you increase your proficiency

What's New

Version 1.20

- Added stack library architecture
- Added Word of day library item
- bug fixes and improvements

Ratings and Reviews

Carina Mae

By far the best flash card app I've found

I've tried SO MANY flash card apps on the market and this is the only one that is simple and intuitive to use. It also blew away my expectations with its "smart cards" feature that gives analytics on my progress and tailors my stacks specially to how I want to learn. The organization is just like having paper flash cards but with the convenience of having them on the go. Perfect for 10sec. or 2hr. long study sessions!!


Dan Beaulieu
65.3 MB
Requires iOS 10.0 or later. Compatible with iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPad Air, iPad Air Wi-Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi-Fi + Cellular, iPad mini 3, iPad mini 3 Wi-Fi + Cellular, iPad mini 4, iPad mini 4 Wi-Fi + Cellular, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, 9.7-inch iPad Pro, 9.7-inch iPad Pro Wi-Fi + Cellular, iPad (5th generation), iPad Wi-Fi + Cellular (5th generation), 12.9-inch iPad Pro (2nd generation), 12.9-inch iPad Pro Wi‑Fi + Cellular (2nd generation), 10.5-inch iPad Pro, 10.5-inch iPad Pro Wi‑Fi + Cellular, iPad (6th generation), iPad Wi-Fi + Cellular (6th generation), iPad Pro (11-inch), iPad Pro (11-inch), iPad Pro (12.9-inch) (3rd generation), iPad Pro (12.9-inch) (3rd generation), and iPod touch.
Age Rating
Rated 4+
© 2017 Dan Beaulieu


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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