Comparison

Readwise vs Chengyu Calendar

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

Head to head
About

Readwise

This app helps you retain more of what you read by centralizing and revisiting your highlights from various reading platforms. It uses spaced repetition and active recall techniques to improve memory and offers features like tagging, note-taking, and OCR for physical books.

Highlights
  • Synchronize highlights from multiple platforms
  • Daily review habit via app and email
  • Spaced repetition and active recall
  • Tag, note, and search highlights
  • OCR for paper book highlights
  • Convert highlights to flashcards
Features
Read full description

Readwise helps you get the most out of what you read by making it fun & easy to revisit your highlights from all your favorite reading platforms in one place. Quickly synchronize your highlights from Kindle, Apple Books, Instapaper, Pocket, Medium, Goodreads, and even paper books. Then start building a daily review habit using the app and daily email. By reviewing your highlights every day, you'll retain dramatically more and you'll finally stop forgetting all the details from books you just finished! --- “Readwise is my favorite new service this year. Save highlights from Kindle, Instapaper, and now tweets... one of the best long-term personal learning tools I’ve come across.” — Caleb Hicks “Besides my Kindle, Readwise has been the most influential tech for improving my reading process.” — Blake Reichmann “If you use Kindle or Instapaper or just enjoy keeping and reading highlights, please sign up to Readwise. It will become one of your cherished services.” — Christopher Galtenberg --- ACTUALLY USE YOUR HIGHLIGHTS Highlighting is great, but why bother if you're never going to see any of your highlights again? Readwise makes it easy to quickly liberate all your highlights into one place, ensuring that you'll actually see and use them, including highlights from: • Amazon Kindle • Apple iBooks • Instapaper • Pocket • Medium • Goodreads • Twitter • Physical Books (using OCR) • Manual Input • CSV Upload STOP FORGETTING WHAT YOU READ How often do you finish a book, only to forget the key ideas two weeks later? We don't remember things by just reading them once. Readwise solves this problem using scientifically proven learning techniques called Spaced Repetition and Active Recall. Readwise resurfaces the right highlights at the right times using a daily email and an app. Readwise even makes it possible to convert your best highlights into flashcards for added retention. TAG, NOTE, SEARCH, AND ORGANIZE With your highlights all in one place, Readwise enables you to organize and connect these ideas in new ways. Use search to find a highlight instantly; use tag to organize highlights within your library; use notes to add your own annotations. HIGHLIGHT PAPER BOOKS Readwise also makes it possible to take highlights from your physical books and papers using your phone’s camera. Just snap a pic, highlight with your finger, and have your favorite highlights saved forever. --- If you are not already a Readwise subscriber, you can get started immediately with a 30-day free trial with no credit card upfront. At the end of the trial, you will not be charged unless you choose to subscribe to Readwise Full or Readwise Lite. Price may vary by location. Manage your subscription from your dashboard. --- Support: Check out readwise.io/faq or email us at hello@readwise.io Privacy Policy: https://readwise.io/tos Terms of Service: https://readwise.io/privacy

About

Chengyu Calendar

Read full description

Build your Chinese, one idiom at a time. Chengyu Calendar puts a new Chinese idiom on your Home Screen every day, on a page designed after the traditional Chinese tear-off calendar. Glance at your phone, learn something new, and come back tomorrow for the next one. Chengyu (成语) are the short, vivid sayings Chinese speakers use every day. Each one carries a story, often centuries old, and knowing them makes your Chinese sound natural. ON YOUR HOME SCREEN The widget shows today's page, just like a real tear-off calendar: • The date, with the day of the week • The idiom, broken down character by character, with pinyin and an English meaning for each • What the whole idiom means • An example sentence, with pinyin and an English translation A new page arrives every morning. IN THE APP Tap the widget to open the full page and go deeper: • Its history: where the idiom came from, and how it came to mean what it does now • More examples: three more sentences showing how it's used, each with pinyin and an English translation TRADITIONAL OR SIMPLIFIED, 都可以! Switch between Simplified and Traditional characters at any time, and every page changes instantly. EVERY DETAIL, CONSIDERED Inspired by the Chinese daily tear-off calendar, Chengyu Calendar was designed to feel more like a physical object than a piece of software. Pages are printed in green on working days and in red on weekends and holidays, just like the real thing. SIMPLE AND PRIVATE • No account needed • Works offline • No ads and no tracking A page a day, made with care by a team of one. SUBSCRIPTION Chengyu Calendar requires a subscription, with weekly, monthly and yearly plans. Payment is charged to your Apple ID when you confirm your purchase. Your subscription renews automatically unless you cancel at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before it ends. You can manage or cancel your subscription in your Apple ID settings at any time. Terms of Use: https://chengyucalendar.com/terms Privacy Policy: https://chengyucalendar.com/privacy

Screenshots

Readwise4 screens
Chengyu Calendar4 screens

Verdict

The call

The clearest difference is update cadence: Chengyu Calendar at daily against Readwise's every 2 weeks. Readwise's advantage is device support (3 vs 1) and iOS requirement (15.5 vs 18.0). On price, ads and in-app purchases 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

Both are free to download. Readwise sells 8 in-app purchases, starting at $4.99 per month and Chengyu Calendar sells 3 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Readwise ships an update every 2 weeks, Chengyu Calendar daily. The most recent releases landed on October 15, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 7 level
Readwise versus Chengyu Calendar: the parameters behind the verdict, then further details
ParameterReadwiseChengyu Calendar
PriceFreeFree
Rating4.8 (1.5K ratings) — better—
Positive reviews72.3% of reviews—
Number of ratings1.5K — better—
Update frequencyEvery 2 weeksDaily — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.5 — better18.0
Further details — not scored
Size110 MB147 MB
Age rating12+4+
DeveloperReadwise, IncFiachra MacFadden

Bugs and requests

Readwise

Reported bugs

3 issues
  • Frequent app crashes
  • Sync failures with certain accounts
  • Unreliable highlight capture

Requested features

5 requests
  • Add support for more reading apps
  • Improve sync and import capabilities
  • Introduce more customization options
  • Enhance search and organization tools
  • Develop a more intuitive mobile interface

Chengyu Calendar

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Readwise

Subscriptions8
  • Readwise Lite Monthly$4.991 Month
  • Readwise Lite Monthly$6.991 Month
  • Readwise Full Monthly Plan$8.991 Month
Show 5 more
  • Readwise Full Monthly$12.991 Month
  • Readwise Lite Yearly$52.991 Year
  • Readwise Lite Yearly$66.991 Year
  • Readwise Full Yearly$94.991 Year
  • Readwise Full Yearly$119.991 Year
3 purchases

Chengyu Calendar

Subscriptions3
  • Weekly3 Days trial$0.997 Days
  • Monthly3 Days trial$2.991 Month
  • Yearly3 Days trial$24.991 Year

Questions

Is Readwise free?
Readwise is free to download, with in-app purchases available.
Is Chengyu Calendar free?
Chengyu Calendar is free to download, with in-app purchases available.
Do Readwise or Chengyu Calendar have ads?
Neither Readwise nor Chengyu Calendar shows ads.
Which is updated more often, Readwise or Chengyu Calendar?
Readwise ships an update every 2 weeks, and Chengyu Calendar daily. Most recently, Readwise was updated on October 15, 2026 and Chengyu Calendar on October 3, 2026.

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