Flexi vs PairLingo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flexi
Build your vocabulary and master new languages with an AI-powered flashcard system. Create personalized cards, get instant translations and definitions, and utilize spaced repetition for effective long-term memorization. Supports numerous languages and offers offline study options.
- Personalized flashcard creation
- AI-powered translations and definitions
- Spaced repetition system
- Text-to-speech pronunciation
- Offline study mode
- Progress tracking
- CSV import/export
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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/
PairLingo
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PairLingo isn't a template flashcard app — it's built to learn any language pair, at your own pace, with your own words. What actually sets it apart: FOUR WAYS TO PRACTISE Match words in two columns, type the translation from memory, hear a word and type what you understood, or flip flashcards and rate yourself. Matching trains recognition, typing and listening train recall, and cards let you grade each word on a four-step scale — which is what lets the review schedule tell "barely knew it" apart from "knew it instantly". TRULY ANY LANGUAGE PAIR Not just English-Hungarian. Combine any two languages — Spanish-Japanese, German-Russian, whatever you're learning. Pick from 24 curated languages for manual entry, or import a CSV for virtually unlimited language combinations. SMART CSV IMPORT, NOT JUST "UPLOAD" Most similar apps just read the file. PairLingo detects when a word's translation changed (typo fix), warns you about accidentally-duplicated groups with similar names, and lets you decide row by row how to resolve conflicts — update the existing word, or add it as new. PHOTO IMPORT, NO TYPING NEEDED See a word list in a textbook? Just take a photo. PairLingo recognizes the words and groups straight from the picture — entirely on your device, nothing ever uploaded — and shows you exactly what it found before anything's added, so you can fix any mistake first. REAL PRIVACY, NOT JUST A PROMISE No backend server. No account required. No ads, no tracking code. Your words sync across your own devices through your own iCloud account — the developer has no technical way to access your data, even if they wanted to. REAL SPACED REPETITION Not a fixed "wrong answers" bin — PairLingo calculates its own review schedule per word. Words you know well come back less often; tricky ones return sooner. Tap any card to hear it read aloud in its native pronunciation, too. A GENUINELY MULTILINGUAL INTERFACE Not just the content — the app's own interface is available in 6 languages (English, Hungarian, German, Spanish, French, Italian), switchable instantly with no relaunch. IPHONE, IPAD AND MAC One app for all your Apple devices. On iPad, the topics and review rows flow into a grid that fills the wide screen; on the Mac, a native app brings a window toolbar, a full menu bar with keyboard shortcuts and a Settings window. Your words and progress stay in sync between all of them through your own iCloud account. MORE FEATURES • A friendly little spider mascot who celebrates your flawless rounds and cheers you on after a slip • Optional example sentences on any word, shown once you've seen the answer — write your own, or import them via CSV • Manual word entry, group management (edit, delete, rename, merge) • Optional daily reminder, at a time you choose — a local notification, no server involved • Choose your round size (4–10 words) and which direction to be asked in • Stats: daily practice streak, a seven-day practice chart, per-group accuracy • 6 clean, matte color themes • Built-in help • Ready-made starter word lists at all 6 CEFR levels (A1–C2), for English or Hungarian paired with Spanish, German, Portuguese, or Italian — import any level, any pair, anytime PairLingo is built by an independent developer with an original codebase — not a purchased template.
Screenshots
Verdict
The clearest difference is in-app purchases: PairLingo at none against Flexi's 4. On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Flexi sells 4 in-app purchases, starting at $5.99 per month. PairLingo asks for nothing beyond the download.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on November 4, 2026 and October 29, 2026 respectively.
| Parameter | Flexi | PairLingo |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (138 ratings) — better | — |
| Positive reviews | 76.6% of reviews | — |
| Number of ratings | 138 — better | — |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 82 MB | 7 MB |
| Age rating | 12+ | 4+ |
| Developer | Tomer Beilinson | BALINT ALASZTICS |
In-app purchases
Flexi
- Premium Monthly7 Days trial$5.991 Month
- Premium Monthly$5.991 Month
- Premium Annual7 Days trial$29.991 Year
- Premium Lifetime$99.99
PairLingo
No in-app purchases









