# Day Day Up (天天向上)

> Day Day Up is an AI-powered English reading app for iPhone and iPad, designed for Chinese-speaking kids aged 6–15 who are learning English (adult learners are supported too). It generates English articles matched to each learner's interests and reading level (CEFR / Lexile), turns looked-up words into spaced-repetition flashcards, builds a practice set for every article (including read-aloud pronunciation scoring), and gives parents a dashboard plus an AI-written weekly report.

Key facts:

- Platform: iOS (iPhone and iPad) on the App Store: https://apps.apple.com/app/id6763717600 . An Android version is planned but not yet available.
- Who it is for: Chinese-native learners of English, mainly kids aged 6–15; teens and adults can use it too. Parents get their own separate account.
- App interface languages: Simplified Chinese, Traditional Chinese and English. Articles and exercises are in English; word definitions and explanations are bilingual.
- Pricing: new users get 7 days of full Premium features for free (no subscription, no payment details, no automatic charge); after that a free tier is always available. Premium is USD $9.99/month or USD $99.99/year (Apple in-app purchase; local prices vary by region). One subscription in a family also unlocks the linked parent/child accounts (up to 2 children per parent).
- Availability: App Store in most regions. Not currently on the mainland China App Store and not currently sold in EU countries.
- Developer: Jie Gao, California, USA. Contact: support@day-day-up.app

## How it works

- Placement: a short adaptive placement test sets the starting level (CEFR + Lexile). The level is re-evaluated from the learner's completed practice, and practice they skip never lowers it.
- Personalized articles: AI writes English articles on topics the learner picks, in 21 genres (stories, news-style, biographies, science, dialogues and more), at their reading level. Learners can also paste their own reading material.
- Reading: tap any word for a bilingual word card (definition, IPA, natural-sounding US English audio, examples, memory tip); long-press for a whole-sentence translation and explanation. Whole articles can be read aloud with 7 natural voices, with the current sentence highlighted and the current word underlined, single-article loop, sentence-by-sentence shadowing mode and lock-screen playback; dialogue stories give each character its own voice. Every article can be regenerated one notch easier or harder, and words with several meanings are color-coded by meaning.
- Small touches while reading: tap a word to look it up, press and hold any word to get its whole sentence translated with the useful phrases and patterns explained. Tapping an inflected form ("ran") shows and saves the base form ("run"); the word card flags when a word is part of a phrase ("look up"); synonyms on the card can be tapped too; example sentences are newly written, always use the word and never just repeat the article's sentence; words already in the learner's list are highlighted in every later article. A read-aloud attempt that captured no sound doesn't count toward the daily limit, reminders support quiet hours, and progress or the parents' weekly report can be shared as a poster with a QR code.
- Vocabulary review: saved words and phrases are reviewed as flashcards scheduled by the FSRS spaced-repetition algorithm, or flipped through article by article.
- Practice for every article: reading comprehension, vocabulary, grammar correction, spelling, synonym matching, cloze, dictation and read-aloud scoring. Pronunciation is scored on accuracy, fluency, completeness and prosody.
- Your pet acts out words: each learner raises one of four pets (dragon, fox, monster, phoenix) from an egg. Common words the learner looks up come with an illustration of their own pet acting the word out (more than 3,000 common words have an illustration; most get one picture of the word itself, while action and feeling words are acted out by the learner's own pet), and the pet grows as the learner studies.
- Motivation: XP, levels, streaks and badges.
- For parents: link a child with a 6-digit invite code, see reading time, streaks, vocabulary progress, practice scores and a 5-dimension ability radar, receive an AI-written weekly report, send encouragement cards, and review words together with the child, using flashcards from stories they read.
- Friends (kid-safe): friends are added only by invite code. Friends can see each other's study card (level, CEFR, streak, weekly XP), send preset cheers, play asynchronous word duels built from words each has mastered (6–10 questions; everyone earns XP), compare weekly XP on a friends-only leaderboard, share stories and compare practice scores, team up on a weekly reading goal, and like each other's badges. There is no stranger search, no free-text chat (preset phrases only) and no online status; anyone can be removed, blocked or reported. Parents can see the full friend list.

## Safety and privacy

- Built for children: AI-generated content is constrained by child-safety rules (no violence, horror or adult content) and targeted to the learner's age.
- Minimal data: no real names on the student side (nicknames only), no precise location or contacts access, the photo library is never browsed (only the one picture a user picks as an avatar, or a screenshot attached to a report, is read), no ads, and learning data is never sold.

## Pages

- [Home (Chinese)](https://day-day-up.app/): main product page
- [Home (English)](https://day-day-up.app/en): English product overview and FAQ
- [User guide](https://day-day-up.app/manual): how to use every feature (Chinese)
- [Privacy policy](https://day-day-up.app/privacy) (Chinese; the Chinese text is authoritative)
- [Children's privacy statement](https://day-day-up.app/children-privacy)
- [Terms of use](https://day-day-up.app/terms)