Everything you need to practice spoken English with real content and AI feedback.
DeltaDaily is for people who already understand English well — but want to sound more confident, clear, and natural when they speak. Whether you're preparing for a meeting, a presentation, an interview, or a conversation you've been avoiding.
For the full step-by-step walkthrough, see How It Works.
Five curated NPR stories delivered every morning from trusted sources like Up First, Short Wave, Planet Money, and more. New stories are added throughout the day. One tap to start practicing — no searching required.
Every story includes a full transcript aligned to the audio at the sentence level. Click any sentence to jump to that moment in the audio. Follow along in real time with automatic highlighting.
Toggle chunk coloring to see natural breath groups within each sentence. Understand how native speakers break up long sentences — useful for improving your own rhythm and pacing.
NPR episodes often include sponsor messages. DeltaDaily automatically detects ad segments and offers a clean, ad-free version with ads stripped out. Toggle between Original and Ad-Free with one click. You can also report missed ads for manual review.
AI-generated transcripts are automatically checked against NPR's published web transcript. Sound-alike errors (e.g., “their” vs. “there”) are corrected algorithmically with 100% precision — no manual review needed. Correction hints show what the AI originally heard, turning mistakes into learning moments.
Select any sentence from the transcript, record yourself saying it, and compare your version with the original. See your transcribed text side by side with the target.
Every recording is evaluated for:
Color-coded word badges show exactly which words need attention, with phoneme-level tooltips explaining what to fix.
Feedback follows a simple formula: two things you did well, one thing to work on. No overwhelming error lists. Retakes are always welcome.
Click any word in the transcript to save it to your personal vocabulary list. Desktop: click or drag-select a phrase. Mobile: tap for a word, long-press for a phrase. Each saved word includes the original sentence context.
When you save a word, DeltaDaily automatically looks up the definition and IPA pronunciation — no manual searching required.
Translate any saved word into Chinese, Japanese, Korean, Spanish, Portuguese, French, German, Vietnamese, Thai, Arabic, Hindi, or Russian. Translations are cached and shared — fast and free for all users.
Multiple-choice quiz drawn from your saved words. Uses spaced repetition scheduling — words you struggle with appear more often, mastered words fade to longer intervals.
AI-generated fill-in-the-blank sentences using your saved words in fresh contexts. Practice using words in real sentences, not just recognizing definitions.
Turn any NPR story into a realistic two-person dialogue — manager and engineer, interviewer and candidate, or customer and advisor. Choose your role, practice turn by turn, and record your lines. Each line is linked to the original audio for reference.
28 built-in scenarios across 7 categories: Professional, Daily Life, Travel, Social, Shopping, Services, and Academic.
Create a roleplay tailored to your exact situation. Define four things: your role, your conversation partner's role, the situation, and your goal. The AI generates a realistic, multi-phase conversation you can practice with.
Two modes:
Conversations follow a four-phase arc — Opening, Exploration, Deep Dive, and Resolution — so they feel like real professional interactions, not random Q&A. Relevant vocabulary is automatically extracted as you go.
Examples: rehearse a Q4 budget review with your CFO, prepare for a second-round interview at a specific company, or practice negotiating project scope with a client.
Reframes imported content into workplace-style speaking prompts — briefings, status updates, and stakeholder presentations. Practice the kind of English you actually need at work.
Timed challenge: read key facts from a story, then record a concise spoken summary in 30–60 seconds. Scored on fact coverage. Builds the skill of clear, structured communication under time pressure.
Your weakest pronunciation words are pulled from past recordings and scheduled using spaced repetition. Three drill types:
Rate yourself from Missed to Perfect after each attempt. The algorithm adjusts review intervals automatically.
One tap and you're listening. DeltaDaily pre-downloads today's Editor's Picks and plays them back-to-back, hands-free — ideal for commutes, walks, or chores. No drills, no transcript interaction required.
Review all past sessions, attempts, and vocabulary in one place:
Select multiple saved recordings and run batch pronunciation analysis. See aggregate scores, per-clip details, and persistent problem words over time.
A personalized Top-3 ranking of words and patterns to work on today, based on your recent performance and spaced repetition schedule.
A free Chrome extension that lets you capture vocabulary from any webpage and sync it to your DeltaDaily account.
| Free | Vocab Pro — $4/mo | DeltaDaily Pro — $15/mo | |
|---|---|---|---|
| Vocab capture (extension) | Local only | Cloud sync | Cloud sync |
| Classic flashcard drills | Local | Server-backed | Server-backed |
| AI vocab drills | With your API key | Server-powered | Server-powered |
| Translation (12 languages) | With your API key | Server-powered | Server-powered |
| Cross-device sync | — | Yes | Yes |
| NPR listening + transcript | — | 1 story/day | Unlimited |
| Roleplay, Meeting, Exec drills | — | 1×/week each | Unlimited |
| AI pronunciation scoring | — | — | Yes |
| Ad-free audio | — | — | Yes |
| Commuter Mode (hands-free) | — | — | Yes |
| Self audio upload | — | — | Yes |
| Executive summary | — | — | Yes |
Annual plans available at a discount: Vocab Pro $36/year, DeltaDaily Pro $108/year.
New users get a 30-day free trial of DeltaDaily Pro — full access, no credit card required.
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