Lockcard - Vocabulary Builder
Lockcard - Vocabulary Builder Summary
Lockcard - Vocabulary Builder is a with in-app purchases iOS app in Education by xinyi fu. Released in Mar 2021 (5 years ago). It has 215 ratings with a 4.71★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 435 monthly active users and generates around $<10K monthly revenue (100% IAP / 0% ads). Store metadata: updated Jan 13, 2026.
Recent activity: 1.00 new ratings this week View trends →
Store info: Last updated on App Store on Jan 13, 2026 .
4.71★
Ratings: 215
Screenshots
App Description
In every word searched, saved, and reviewed, there lies a story, an opportunity to add this world into your vocabulary and become more eloquent and confident on expressing yourself.
Our app isn't just about learning English or any other languages; it's about opening doors to new opportunities, understanding, and global connections. Join us on this journey. Discover words, discover worlds.
What our users say about Lockcard:
"Ya'll are amazing. Ever since I started using Lockcard, it's become something I use daily" — James (15y high school student)
"Super helpful especially with my busy schedule" — Peng (International Uni student)
"The simplicity and beautiful designs make it such a delight to use" — Charlotte (works @Duolingo)
"One of the most impressive apps I've used in a long time!" — Jordan
By downloading this app, you agree to Apple’s standard End User License Agreement https://www.apple.com/legal/internet-services/itunes/dev/stdeula/