# Stem Cards: Vocabulary Builder — Roots, Prefixes & Suffixes > Educational app for learning English word stems, prefixes, and suffixes. (iPhone/iPad app by Le Huang.) - Source: https://appshunter.io/ios/app/stem-cards-vocabulary-builder/id6478243260 (this page in markdown: same URL + `.md`) - Developer: [Le Huang](https://appshunter.io/developer/1015141828) - Category: Education, Productivity - Price: Free with in-app purchases - Rating: 4.80/5 from 29 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 16.0 · 22 MB - Languages: American English, Japanese, Chinese (Simplified, China) - Released: 2024-02-27 - Data updated: 2026-10-27 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/stem-cards-vocabulary-builder/id6478243260/reviews.md ## What is Stem Cards? Word lists evaporate. You memorize dozens of words for a test, and a week later most of them are gone — because every word was memorized on its own. Stem Cards teaches the parts words are built from instead: learn one root, prefix, or suffix, and a whole family of words starts making sense. One part learned, dozens of words unlocked. Features: - Flashcards that teach understanding, not memorization: Flip through interactive flashcards for stems, prefixes, and suffixes. Each card gives the meaning, example words, and audio pronunciation. - Daily Review & Mistakes — stop losing what you studied: Stems you missed, or flipped without grading, come back in a daily review queue, and missed stems stay in a Mistakes deck until you mark them "Got it." - Audio Pronunciation: Listen to clear audio pronunciation for every stem and example word to build listening and speaking confidence. - Vocabulary Builder & SAT/GRE Prep — get test-ready: Master Greek and Latin roots used in U.S. middle/high school curriculums and standardized test prep (SAT, ACT, GRE, TOEFL). - Challenge Quizzes — prove it to yourself: Test your retention with untimed and timed quizzes designed to challenge and cement your grasp of English word stems. - Instant Dictionary Search — never get stuck on an unfamiliar word: Quickly look up explanations, origins, and examples for any English stem, prefix, or suffix you encounter. - Favorites & Bookmarks — focus on your weak spots: Save difficult stems to revisit anytime for targeted, focused study sessions. - Stem Cards Pro — one-time purchase, no subscription: Remove ads, unlock full dictionary search, and save unlimited bookmarks. Why did I build this? Stem Cards is a project inspired by my son's middle school English teacher (Hat tip to Mrs. Wood!). She encouraged students to make index cards with English word stems, meanings, and drawings. I observed how quickly my son learned this way and how fun it was to make and use those cards. "I love this app! It's so easy to use and I can bring it with me everywhere I go. I'm learning so much!" - My 11yo son "Sometimes, when we are eating out, our family tests each other with the quizzes. It's a fun way to learn and have family time!" - My friend "In China, we used to memorize English words by heart. It was so hard! Now, with Stem Cards, I can learn English easily and fun!" - My friend in China Now, with Stem Cards, you can learn like him. Explore English word stems, play with flashcards, and test yourself. It's fun and easy! ## Key features - Large collection of stems, prefixes, suffixes - Interactive flashcards with visuals - Quizzes to test knowledge - Search feature for word parts - Bookmark favorite stems ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Remove Ads | $4.99 | one-time | ## Is Stem Cards safe? Not enough ratings yet to assess Stem Cards. ## Is Stem Cards legit? Stem Cards: Vocabulary Builder appears to be a legitimate app. The AppsHunter Legitimacy Score for Stem Cards is 85 out of 100 points across 7 verification signals from App Store and developer data. ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/stem-cards-vocabulary-builder/id6478243260/reviews.md ### 5/5 — It is the best app I have. *2024-03-17* It taught me how to read and write accurately and it is very useful. Whoever wants to get a good app, get this one. This is purely fun and absolutely amazing for any beginner to learn English. **Developer response:** Awww, your feedback just made my day! Thanks!🙏 ## Frequently asked questions about Stem Cards ### What is Stem Cards? Stem Cards is an educational app designed to help users learn English word stems, prefixes, and suffixes. It uses flashcards, quizzes, and a search function to make learning engaging and effective. ### What kind of content does Stem Cards offer? Stem Cards provides a large collection of stems, prefixes, and suffixes that are commonly used in U.S. middle school English curriculums. Each flashcard includes meanings, examples, and visuals. ### How does Stem Cards help users learn? The app utilizes interactive flashcards for review, quizzes to test comprehension and track progress, and a search feature to look up specific word parts. Users can also bookmark their favorite stems for easy access. ### Is Stem Cards suitable for all ages? Stem Cards has an age rating of 4+, making it suitable for a wide range of users. Its content is particularly aligned with middle school English curriculums. ### What devices is Stem Cards available on? Stem Cards is available on iPhone and iPad devices, allowing users to learn on the go. ### How often is Stem Cards updated? The latest version of Stem Cards is 2.3.0, and it was last updated on January 31, 2026. This indicates a commitment to ongoing development and content refinement. ### Does Stem Cards have ads? No, Stem Cards does not contain advertisements. This ensures an uninterrupted learning experience for users. ### What is the user sentiment for Stem Cards? User feedback highlights the app's ease of use, portability, and effectiveness in learning. Families also find it to be a fun way to learn together. ## Version history (last 5 releases) ### 3.0.0 — 2026-10-27 Hi, this is Grace, the developer of Stem Cards. I'm thrilled to introduce Stem Cards 3.0 — our biggest update yet! This version completely redesigns the app to make learning English stems more effective, structured, and enjoyable: - A Fresh New Home: Everything you need in one place. Jump straight back into learning with the new Continue row, quick-start recommendations, and your daily practice goals. - Active Recall & Mastery: Cards are now graded so you truly learn. Mark cards "Got it" to build mastery, or "Still learning" to automatically queue them into your personalized Mistakes deck for extra practice. - "Due Today" Daily Review: Never lose what you've studied. A smart daily queue brings back missed and overdue stems right when you need to review them. - 60-Second Sprint & Quizzes: Challenge your speed and retention in the fast-paced 60s sprint, track your personal best, and practice missed stems right after finishing a quiz. - iPad & Dark Mode: Enjoy full native Dark Mode, polished iPad and Split View layouts, and a refined high-contrast color palette. Thank you so much for using Stem Cards! As always, I'm grateful for your feedback and suggestions. Please feel free to reach out to me at higracehuang@gmail.com. ### 2.3.0 — 2026-01-31 Hi, this is Grace, the developer of Stem Cards. In this update, I added cards and practices based on US grade levels. As always, I'm grateful for your feedback and suggestions. Please feel free to reach out to me at higracehuang@gmail.com. ### 2.2.0 — 2026-01-25 Hi, this is Grace, the developer of Stem Cards. In this update, I added Japanese translation. As always, I'm grateful for your feedback and suggestions. Please feel free to reach out to me at higracehuang@gmail.com. ### 2.1.2 — 2024-11-20 Hi, this is Grace, the developer of Stem Cards. In this update, I cleaned up some redundant roots and optimized the UX by reducing the computational complexity. In addition, my daughter told me that her teacher emphasized all meanings should be lowercase(!!!). So I updated that as well. Thank you for using Stem Cards. Please feel free to reach out to me at higracehuang@gmail.com. ### 2.1.1 — 2024-11-16 Hi, this is Grace, the developer of Stem Cards. In this update, I cleaned up the settings page. As always, I'm grateful for your feedback and suggestions. Please feel free to reach out to me at higracehuang@gmail.com. ## Apps similar to Stem Cards | App | Rating | Price | Category | | --- | --- | --- | --- | | [Prefix, Suffix & Root Words](https://appshunter.io/ios/app/prefix-suffix-and-root-words/id6474117251) | 4.8 (32) | Free | Education | | [WordBranch -Prefix/Root/Suffix](https://appshunter.io/ios/app/wordbranch-prefixrootsuffix/id1561128020) | 4.6 (5) | Free | Education | | [RootWords](https://appshunter.io/ios/app/rootwords/id6503809963) | 4.0 (4) | Free | Education | | [Word Roots Puzzle](https://appshunter.io/ios/app/word-roots-puzzle/id6787639090) | — | Free | Education | | [S-RootWords – Learn Vocabulary](https://appshunter.io/ios/app/s-rootwords-learn-vocabulary/id6757831810) | 5.0 (2) | Free | Education | | [Root Rush - Roots to Smarts](https://appshunter.io/ios/app/root-rush-roots-to-smarts/id6747834125) | 5.0 (3) | Free | Education | ## More apps by Le Huang - [TallyCoin: Chores & Earnings](https://appshunter.io/ios/app/tallycoin-chores-and-earnings/id1633932632) - [ReadingClock: Reading Tracker](https://appshunter.io/ios/app/readingclock-reading-tracker/id6473550400) - [LocalSpeaks: Global Phrasebook](https://appshunter.io/ios/app/localspeaks-global-phrasebook/id6615060694) - [QuizMe.AI - AI Quiz Maker](https://appshunter.io/ios/app/quizmeai-ai-quiz-maker/id6720763773) - [Itemize AI](https://appshunter.io/ios/app/itemize-ai/id6737280335) All apps by Le Huang: https://appshunter.io/developer/1015141828 ## Related topics [prefix, suffix & root words](https://appshunter.io/ios/topics/prefix-suffix-root-words) · [word roots](https://appshunter.io/ios/topics/word-roots) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-27.*