Flexi is an AI-powered vocabulary builder and language-learning flashcard app that turns a word or short expression into ready-to-study cards in seconds. Compare options for different meanings, edit any detail, and save one or several cards to your deck.
Each AI-generated flashcard can include a translation, contextual example, definition, part of speech, and—where supported—a written pronunciation guide. Flexi then schedules reviews with FSRS-powered spaced repetition to help you remember vocabulary long term.
WHY LEARN WITH FLEXI?
- AI Flashcard Maker: Enter a word or short expression and get several editable card options for relevant meanings.
- Complete Vocabulary Cards: Generate translations, examples, definitions, parts of speech, and pronunciation guides based on your deck’s language and settings.
- Pronunciation Guides: Generate IPA for English, Spanish, German, Dutch, Czech, Finnish, and Romanian; kana for Japanese; Pinyin or Zhuyin for Mandarin Chinese; and Jyutping for Cantonese.
- Spaced Repetition: Study and memorize new words with FSRS-based scheduling that plans reviews at the right time.
- Text-to-Speech Audio: Hear words and examples to practice listening and pronunciation.
- Flexible Card Creation: Add one card, select several meanings at once, or paste a word list to create flashcards in bulk.
- Easy Imports: Bring your existing study decks from Anki, Quizlet, or CSV files.
- English Vocabulary Sets: Start learning immediately with curated, ready-made word sets.
- Quick Notes: Save words you meet in videos, books, or conversations and turn them into flashcards later.
- Track Your Progress: Follow your learning progress and study comfortably with Dark Mode.
FLEXI PREMIUM
- Interactive AI Language Tutor: Ask questions about any flashcard, explore nuances, and practice fill-in-the-blank exercises at your level.
- AI and Personal Images: Generate or upload images to strengthen visual memory.
- Topic-Based Vocabulary: Build word sets for travel, business, idioms, small talk, and more.
- Full Catalog Access: Unlock all curated English vocabulary sets.
SUPPORTED LANGUAGES
English, Spanish, French, German, Dutch, Japanese, Korean, Chinese (Simplified and Traditional), Italian, Portuguese, Russian, Arabic, Turkish, Swedish, Danish, Norwegian, Polish, Ukrainian, Hungarian, Czech, Thai, Hebrew, Vietnamese, Finnish, Romanian, and Serbian.
Try Flexi Premium free for 7 days and build a vocabulary study system that fits your goals.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Honestly, with this new update, the app feels so much more alive especially with the pronunciation feature. Really hoping the dev keeps this momentum going and drops even more cool stuff. But I do have one suggestion: give us more flexibility with languages. The current list is kinda limited, and since iPhones already have built-in voices, why not let us manually add words outside the default options? Especially in the translation section ,users could add their own definitions. That would totally remove the barrier that's probably stopping a lot of people from subscribing. Plus, flashcards could be used for everything - math, physics, chem, or even bio stuff that needs images. So yeah, please add more customization options. Appreciate you reading this!
Developer Response
Thank you for your feedback! Persian isn't currently supported by the Gemini AI models used in the app. I'm monitoring updates and hope to include it as soon as it's available. Appreciate your patience!
Right to the point
TiredDad154
Yes, there are other flashcard apps out there that have every bell and whistle you can think of—but they’re clunky, complicated, and frankly not pleasant to use. Flexi eliminates all of those frustrations and just gets you practicing faster, easier, and in a more fun way. Love this app!
Developer Response
Thank you! I'm happy to hear Flexi has been a good fit for your learning.
new update is very not user friendly
lemurrrk
I just want to create a card with a word and its translation. The latest update has made this action so inconvenient; I need to do so many extra steps. Delete everything the AI has done and write my own examples, because I want to use my own, but the AI does this without asking. I’m finding it very inconvenient to use. Please understand that this update hasn’t made anything easier. I’m already thinking about looking for other options. It’s a real pity — everything was fine before this update.
Developer Response
Thank you for the feedback, and I’m sorry the new flow has added extra work. In your deck’s settings, under Personalization → Automatically generated fields, you can disable the extra fields so new cards contain only the word and translation. You can still add your own examples.The goal was to reduce repetitive generation as more fields were added, and to offer separate cards for different meanings instead of combining them into one card.I’ll think about how to make these choices clearer. I hope the settings help in the meantime!
Great functionality
d1linger
A fun and easy way to boost your vocabulary regardless of your level. Love the simple design and customisation. The coolest thing is that you can adjust an app to your needs and it really does help you to expand your knowledge of the language
Developer Response
Hi, thank you for your positive review! I'm glad my app helps you expand your language knowledge. Happy learning!
• iPhone Duo support
Enjoy layouts designed for both displays of iPhone Duo, with navigation, lists and controls that make better use of the available space. Create cards, browse your decks and study on the inner or outer display. When reviewing in a seated position, cards appear above the fold with controls below.
• Improvements and fixes
Small improvements and bug fixes to make learning smoother.
Version 3.9.0
The developer, Tomer Beilinson, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
Purchases
Contact Info
Identifiers
Usage Data
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
Larger Text
Dark Interface
Information
Seller
Tomer Beilinson
Size
74.5 MB
Category
Education
Compatibility
Requires iOS 18.0 or later.
iPhone Requires iOS 18.0 or later.
iPad Requires iPadOS 18.0 or later.
Mac Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.