Comparison

DuoCards vs Promptory

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DuoCards

Master a new language with interactive flashcards and video courses. This app helps you build vocabulary, guess words, and track your progress across over 50 languages. Learn effectively through spaced repetition and integrated translation tools.

Highlights
  • Flashcard learning with spaced repetition
  • Video language courses with interactive subtitles
  • Integrated translator for over 50 languages
  • Vocabulary builder and progress tracker
  • Guess words and phrases to sharpen skills
  • Read foreign language articles
Features
Read full description

Build vocabulary from the real content you already enjoy. DuoCards helps you save new words from videos, articles, shared decks, and your own notes, then remember them with smart flashcards and spaced repetition. Why learners choose DuoCards: - Save words and phrases from videos, subtitles, and articles - Practice with an AI tutor for real-life conversations - Improve pronunciation with instant feedback - Review vocabulary with flashcards that adapt to your progress - Learn English, Spanish, French, German, Japanese, Korean, and 50+ languages - Use ready-made courses, public decks, or your own personal word lists Learn in a simple loop: 1. Discover useful words in context 2. Save them to your personal deck 3. Review, speak, listen, and remember Whether you are learning for travel, school, work, or everyday conversations, DuoCards gives you a flexible way to build vocabulary and keep it in memory. Download DuoCards and start building your language habit today. Terms of use: https://www.duocards.com/termsofuse.html Privacy policy: https://www.duocards.com/privacypolicy.html

About

Promptory

Features
Read full description

Promptory — Your Curated AI Prompt Library Unlock the full potential of AI with the perfect prompt, every time. Promptory is your go-to mobile library for discovering, customizing, and using high-quality AI prompts. Whether you work with ChatGPT, Claude, Gemini, or any other AI tool, Promptory helps you get better results — faster. WHAT YOU GET • Curated Prompt Library — Browse a handpicked collection of AI prompts across 13+ categories: Coding & Programming, Creative Writing, Business & Marketing, Education, Design, Travel, and more. • Daily Pick — A fresh prompt of the day to inspire new ideas and workflows. • Smart Search — Quickly find exactly the prompt you need with full-text search. • Customizable Parameters — Adjust audience, tone, style, and constraints to fit your use case, then copy to clipboard with one tap. • Favorites — Save and organize the prompts you love. Access them anytime, filtered by category. • Easy Sharing — Share your favorite prompts with friends via the native share sheet. WHO IT'S FOR — Developers who need prompts for coding, debugging, and review — Content creators and writers looking for structured prompts — Marketers and entrepreneurs for copywriting and strategy — Students and educators for learning and research — Anyone who uses AI and wants better results Stop guessing. Start prompting. Download Promptory today and never struggle with a blank prompt again.

Screenshots

DuoCards4 screens
Promptory3 screens

Verdict

The call

The clearest difference is in-app purchases: Promptory at none against DuoCards's 11. Promptory also leads on ads (none vs shown). DuoCards's advantage is iOS requirement (13.0 vs 16.4). On price, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. DuoCards sells 10 in-app purchases, starting at $19.99 per month. Promptory asks for nothing beyond the download.

UpkeepUpdate frequency

DuoCards ships an update monthly, Promptory every 2 months. The most recent releases landed on September 24, 2026 and August 21, 2026 respectively.

Scorecard3 real differences · 7 level
DuoCards versus Promptory: the parameters behind the verdict, then further details
ParameterDuoCardsPromptory
PriceFreeFree
Rating4.7 (1.3K ratings) — better—
Positive reviews63.3% of reviews—
Number of ratings1.3K — better—
Update frequencyMonthly — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.4
Further details — not scored
Size19 MB60 MB
Age rating4+4+
DeveloperDuoCards s.r.o毅 李

Bugs and requests

DuoCards

Reported bugs

4 issues
  • App freezes and crashes
  • Issues with logging in and accessing content
  • Inconsistent behavior when adding new words
  • Problems with video playback and subtitles

Requested features

4 requests
  • Offline mode
  • More customization options
  • Improved spaced repetition system
  • Better integration with other language learning tools

Promptory

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

DuoCards

Subscriptions10
  • DuoCards Premium2 variants$19.991 Month
  • DuoCards Plus$33.003 Months
  • DuoCards Premium$34.993 Months
Show 7 more
  • DuoCards Premium$49.991 Year
  • DuoCards Premium7 Days trial$64.901 Year
  • DuoCards Premium7 Days trial$67.991 Year
  • DuoCards Premium1 Year trial$107.991 Year
  • DuoCards Premium7 Days trial$109.001 Year
  • DuoCards Premium7 Days trial$113.991 Year
  • DuoCards Premium1 Year trial$162.991 Year
None

Promptory

No in-app purchases

Questions

Is DuoCards free?
DuoCards is free to download, with in-app purchases available.
Is Promptory free?
Promptory is free to download, with no in-app purchases.
Do DuoCards or Promptory have ads?
DuoCards shows ads; Promptory does not.
Which is updated more often, DuoCards or Promptory?
DuoCards ships an update monthly, and Promptory every 2 months. Most recently, DuoCards was updated on September 24, 2026 and Promptory on August 21, 2026.

Other comparisons