Comparison

Chinese Annotator vs 句式

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Chinese Annotator

This app helps you learn Chinese by reading ePub books. It allows you to add Pinyin and English definitions directly to the text, and track your vocabulary knowledge. You can also export your learned words for flashcard review.

Highlights
  • Import ePub files
  • Add Pinyin and English definitions
  • Track known words and characters
  • Hide known Pinyin/definitions
  • Export word lists for flashcards
  • Print pages to PDF
Features
Read full description

A Chinese ePub reader to assist you in reading Chinese characters. After importing an ePub, you can add Pinyin and English on to the text in a 3-line format. After annotating the text in this way, you can then mark on a word by word basis which definitions you already know and which characters you know. There is a setting that hides the pinyin or definitions of words that you know. In this way, you are forced to look at the character and recall it instead of relying on pinyin. A word list is also available to allow you to see all words, words with unknown definitions, or words with unknown pinyin. This list of words can be exported to a file to be imported in to a flash card system, like Pleco. This allows you to easily pick out all the words you don't know in a publication and review them. You can also print the page of the book currently being displayed. In iOS 10 and greater, you can print to PDF.

About

句式

This app focuses on teaching practical Chinese sentence structures instead of just vocabulary. It uses AI feedback and spaced repetition to help users build and speak real sentences confidently.

Highlights
  • Learn sentence patterns in context
  • Build real sentences with AI feedback
  • FSRS spaced repetition
  • AI tutor chat (premium)
  • Background audio practice (premium)
  • Full learning statistics (premium)
Features
Read full description

You know hundreds of Chinese words. So why does forming a sentence still feel impossible? Most apps hand you flashcards and hope grammar sorts itself out. It doesn't. You end up with a head full of vocabulary and no idea how to string it into something you'd actually say. DouDou Chinese (句式) fixes the real bottleneck: sentence patterns, not word lists. Learn the 100 structures that natural Mandarin conversation is actually built on, then build your own sentences with each one — with instant AI feedback the moment you get it wrong, so mistakes never turn into habits. HOW IT WORKS • Learn a pattern in context, not in isolation • Apply it immediately by building real sentences • Get instant AI feedback and fix mistakes on the spot • Review with FSRS spaced repetition — timed to hit right before you'd forget, so nothing you learn quietly slips away No signup, no setup. Open the app and you're already practicing. WHY IT'S DIFFERENT Vocabulary apps make you feel like you're learning. Sentence patterns make you able to speak. That's the difference between recognizing "你好吗" on a flashcard and actually holding a conversation. FREE, NO CATCH • Spaced repetition flashcards • Spaced repetition audio loops • Sync across all your devices • Basic settings GO PREMIUM — 7-day free trial, then $5/month • AI tutor chat, on demand • 20,000 quiz tokens a day • Every pattern, unlocked • Background audio, so you can practice on your commute • Fine-tune the FSRS algorithm to your pace • Full learning statistics Cancel any time in your account settings — no pressure, no hoops. Every day you put off speaking is another day it feels harder to start. Download DouDou Chinese and build your first real Chinese sentence in the next five minutes. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Chinese Annotator4 screens
句式4 screens

Verdict

The call

The clearest difference is price: 句式 at Free against Chinese Annotator's $0.99. 句式 also leads on rating (5.0 vs 4.1). Chinese Annotator's advantage is in-app purchases (none vs 1) and ratings volume (30 vs 1). On update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

句式 is free to download; Chinese Annotator costs $0.99 up front. 句式 sells 1 in-app purchase, starting at $4.99 per month. Chinese Annotator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

句式 holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Chinese Annotator has 30 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Chinese Annotator ships an update every 2 weeks, 句式 every 3 weeks. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.

Scorecard6 real differences · 4 level
Chinese Annotator versus 句式: the parameters behind the verdict, then further details
ParameterChinese Annotator句式
Price$0.99Free — better
Rating4.1 (30 ratings)5.0 (1 ratings) — better
Positive reviews72.0% of reviews—
Number of ratings30 — better1
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.1
Further details — not scored
Size65 MB55 MB
Age rating4+4+
DeveloperJon HargettFabian Grimme

Customer experience

Chinese Annotator

All ratings30 ratings
Positive76.7%
Neutral13.3%
Negative10.0%
Written reviews25 reviews
Positive72.0%
Neutral12.0%
Negative16.0%

句式

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Chinese Annotator

No in-app purchases

1 purchases

句式

Subscriptions1
  • Premium7 Days trial$4.991 Month

Questions

Is Chinese Annotator free?
Chinese Annotator costs $0.99, with no in-app purchases.
Is 句式 free?
句式 is free to download, with in-app purchases available.
Which has better reviews, Chinese Annotator or 句式?
句式 is rated higher. Chinese Annotator averages 4.1 out of 5 from 30 ratings, while 句式 averages 5.0 from 1 ratings.
Do Chinese Annotator or 句式 have ads?
Neither Chinese Annotator nor 句式 shows ads.
Which is updated more often, Chinese Annotator or 句式?
Chinese Annotator ships an update every 2 weeks, and 句式 every 3 weeks. Most recently, Chinese Annotator was updated on October 9, 2026 and 句式 on October 1, 2026.

Other comparisons