SubPlay vs Duoler
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
SubPlay
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In this product, you can learn languages using YouTube videos powered by AI. App Features: * Speak along with audio * Listening review * Tag search * In-app YouTube * Subtitle list search * Subtitle list translation * Partial subtitle translation * History of partial subtitle translations * Review of partial translations * Bookmark videos/subtitles * Video search and filtering * Video viewing history * Multilingual support You can also learn the following languages in this app: * Japanese * English * Korean * Spanish * French * German * Italian * Portuguese * Hindi * Arabic * Russian * Simplified Chinese * Traditional Chinese For more details, please check the landing page: https://sub-play.netlify.app/en/top
Duoler
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Duoler - Learn Languages by Watching Videos Tired of boring vocabulary drills? Try Duoler! Import your favorite videos, generate subtitles with AI, and learn while you watch - in English, Japanese, Chinese, Korean, and more. KEY FEATURES AI Subtitle Generation No subtitles? No problem! Duoler uses on-device Whisper AI to transcribe speech in 11 languages - Simplified Chinese, Traditional Chinese, Japanese, Korean, Cantonese, English, French, German, Spanish, Italian, and Portuguese. Automatically generate bilingual subtitles with translation into 21 target languages. All processing stays on your device, completely private. Import Any Video Add your own video files with SRT, VTT, or ASS/SSA subtitles - or let AI generate them for you. Learn from movies, shows, lectures, or any video you love. Tap to Translate While watching, tap any word in the subtitles to instantly see its translation and definition. Tap a sentence to translate the whole line. Powered by Apple Translation with 21 languages supported - all on-device, no internet required. Smart Word Library Automatically saves words you look up or collect. Double-tap any word to instantly save it. Organize by date, video, or language pair. Each word retains its video context to help you remember. Sentence Book Collect entire sentences while watching - with auto-captured screenshots and audio clips from the video. Perfect for reviewing memorable dialogues and building comprehension. Subtitle Editor View and edit subtitle text and timing directly in the app. Fine-tune AI-generated or imported subtitles to perfection. SRT Export Export AI-generated subtitles as SRT files. Share your transcriptions or use them with other tools. (Premium) Multi-Language Support Transcribe speech in 11 languages and translate into 21 languages - mix and match to create the learning combination that works for you. App interface available in 23 languages. Playback Controls Adjust playback speed, subtitle timing offset, and subtitle background opacity. Navigate between subtitle lines with ease. [WHY DUOLER] - Contextual Learning - Learn words and sentences in real contexts, remember them longer - Interest-Driven - Learn with content you actually enjoy watching - AI-Powered - Generate subtitles for any video, even without existing subtitle files - Privacy First - All AI processing, videos, and learning data stay on your device - Smart Import - Import by reference to save storage, or copy for portability Download now and start your immersive language learning journey! --- Premium Subscription: - Unlock unlimited AI transcription, SRT subtitle export, and more - Free users enjoy unlimited word collection with 5 minutes/day AI transcription - Subscription auto-renews unless cancelled at least 24 hours before the end of the current period - Manage subscriptions in iPhone Settings > Apple ID > Subscriptions Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: SubPlay at every 3 weeks against Duoler's every 6 weeks. SubPlay also leads on iOS requirement (16.0 vs 18.1). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. SubPlay sells 3 in-app purchases, starting at $2.99 per month and Duoler sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
SubPlay ships an update every 3 weeks, Duoler every 6 weeks. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.
| Parameter | SubPlay | Duoler |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks β better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad β better | iPhone |
| Requires iOS | 16.0 β better | 18.1 |
| Further details β not scored | ||
| Size | 62 MB | 634 MB |
| Age rating | 4+ | 4+ |
| Developer | Vadim Petrov | ηΏ ζΆ εΎ |
In-app purchases
SubPlay
- Mini Plan3 Days trial$2.991 Month
- Basic Plan3 Days trial$4.991 Month
- Study Plan$7.991 Month
Duoler
- Monthly Subscription$2.991 Month
- Annual Subscription$24.991 Year









