New 10-second warm-up: answer 1–3 quick fill-in-the-blank questions before you write, see why instantly, and share your result with friends.
Master the subtle differences between English words — one pair a day.
DailyDiff gives you two easily confused words every day (like Begin vs Start), each with a clean black-and-white illustration. Your job: explain, in English, how they really differ. An AI then scores your answer across five dimensions and reveals the model answer — so you learn something precise every single day.
WHY DAILYDIFF
• One focused puzzle a day — no endless feeds, no overwhelm
• Write freely; get specific AI feedback, not multiple choice
• Five-dimension scoring: accuracy, coverage, language, clarity, insight
• A clear model answer with definitions, key differences, examples, and common mistakes
• Build a daily streak and share a no-spoiler result card
Perfect for English learners, ESL / TOEFL / IELTS prep, writers, and anyone who loves the nuance of words.
One subtle difference a day. That's all it takes.
DailyDiff Pro — Subscription
Unlock past puzzles and more daily AI scorings with DailyDiff Pro, an auto-renewable subscription.
• Monthly — $1.99 / month
• Yearly — $12.99 / year (best value)
Today's puzzle and a basic daily AI scoring are free. Pro is optional.
Payment will be charged to your Apple Account at confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current
period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription in your Apple Account settings after purchase. Prices may vary by region.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://dailydiff.vip/privacy
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New: 10-second warm-up
- Before you write, warm up with 1–3 quick fill-in-the-blank questions on today's word pair.
- Tap an answer and see instantly whether it's right, with a one-line explanation of the difference.
- Not in the mood? Skip it anytime and go straight to your answer.
- Share your warm-up result as green and red squares, Wordle-style — no spoilers.
Version 1.2.1
The developer, LuYang Li, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
Purchases
Contact Info
User Content
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Usage Data
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
LuYang Li
Size
4 MB
Category
Education
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
Mac Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.