What free actually includes.
Unlimited word and sentence translation with Google + Microsoft dual-engine results, bilingual subtitles on all supported platforms, unlimited subtitle downloads, smart sentence segmentation on YouTube, full-page web translation, and 50 pages/month of PDF translation. That is more permanent free functionality than any competitor — Language Reactor's free tier stops at Netflix and YouTube, and LangPanda has no free tier at all.
Where free ends.
Two caps and one absence: 100 saved words, 50 saved sentences, and none of the AI features. If you're actively collecting vocabulary, the word cap fills within weeks by design.
What Premium adds
($42/year list — frequently promoted lower, so treat sale prices as temporary): unlimited saving, AI word definitions, AI speaking coach and pronunciation evaluation, YouTube AI subtitle transcription (up to 40 videos/day), and 2,000 PDF pages/month.
What Premium + Advanced AI adds
($105.60/year list): a 20,000,000-token monthly allowance across modern AI engines (GPT-5-mini, GPT-4.1 mini, DeepSeek V4, Claude 4.5 Haiku, Gemini 3.0 Flash) powering higher-quality translation and analysis, 60 videos/day transcription, and 4,000 PDF pages/month.
Who should pay, honestly.
Upgrade to Premium when you hit the saving caps and want the AI comprehension features. The Advanced AI tier is for heavy users who also translate documents for work or study. And if what you're really building is a vocabulary study system — spaced repetition, Anki export, cards with audio — no Trancy tier does that; that's LangPanda territory, and it's the main reason committed learners graduate off Trancy. Our full Trancy review covers the whole picture.