Terms of use
Last updated: 1 October 2026
These terms cover your use of Chengyu Calendar, an app made by one person: me, Fiachra (Fiki) MacFadden. The App Store licenses the app to you under Apple’s standard licence agreement, which you can read at apple.com/legal/internet-services/itunes/dev/stdeula. These terms add to Apple’s agreement, and if the two ever disagree, Apple’s agreement wins. By downloading or using the app, you accept both. If you do not accept them, please do not use the app.
What the app is
Chengyu Calendar is for people learning Chinese. Every day it shows a new Chinese idiom, known as a chengyu, with its meaning, its story and examples of how it is used, in Simplified or Traditional characters. Its design is inspired by the Chinese tear-off calendar, and it is made to live on your Home Screen as a widget. You don’t need an account, and you only need an internet connection to buy, restore or check your subscription.
Age
The app is suitable for all ages. If you are too young to accept terms like these where you live, a parent or guardian must accept them for you.
Subscriptions
You need a subscription to use Chengyu Calendar. The app offers weekly, monthly and yearly plans, which renew automatically. You will see the price, in your own currency, before you buy, and Apple charges your Apple ID when you confirm.
Plans may begin with a free trial: if yours does, you will see how long it lasts and the price that follows before you start, and nothing is charged during the trial. Unless you cancel at least 24 hours before the trial ends, your subscription begins when it ends and Apple charges the plan’s price. Each Apple ID can have one free trial.
Your subscription renews automatically at the end of each period unless you cancel at least 24 hours before it ends, and Apple charges the renewal within the last 24 hours of the period.
To manage or cancel, go to your iPhone’s Settings, tap your name, then Subscriptions; you can also tap Manage subscription on the back of the calendar. After you cancel, you keep access until the end of the period you have already paid for, and deleting the app does not cancel your subscription.
If a price goes up, Apple will tell you in advance, and will ask for your agreement where the law requires it; a price change never affects a period you have already paid for.
Apple sells the subscription, so refunds are handled by Apple, and you can ask for one at reportaproblem.apple.com — none of which affects your legal rights as a consumer.
Your subscription belongs to your Apple ID: to use it on another iPhone signed in to the same Apple ID, tap Restore purchases, either on the subscription screen or on the back of the calendar.
My content
The idioms are part of the Chinese language and belong to no one. Everything else in the app belongs to me or is used with permission: the writing, the calendar’s design, the drawings and the code. You may use the app for your own learning. You may not copy, share, sell or republish its content, and you may not take the app apart or change it, except where the law allows. The fonts are used under their open-source licences.
Fair use
Do not use the app for anything illegal, do not interfere with how it works, and do not try to get around the subscription.
Suggestions
If you send me ideas, I may use them to improve the app without paying you for them.
Accuracy
I work hard to get every idiom right, but I can’t promise the app is free of mistakes, always available, or right for your needs. It is a learning tool, not a dictionary. As far as the law allows, the app is provided as it is.
Liability
As far as the law allows, I am not responsible for any loss or damage caused by using the app or being unable to use it. If I am found responsible, the most I will pay is what you paid for the app in the 12 months before the claim. This does not limit my responsibility for death or injury caused by my negligence, for fraud, or for anything else the law does not allow me to limit.
Apple
These terms are an agreement between you and me, not Apple, and Apple is not responsible for the app or its content. Apple does not have to provide any maintenance or support for the app.
If the app fails to work as promised, you can tell Apple, and Apple will refund what you paid, if anything; as far as the law allows, Apple has no other responsibility for the app working as promised.
I, not Apple, am responsible for any claims about the app, including claims that it is faulty, breaks a law or regulation, or breaks consumer protection law. If anyone claims the app, or your use of it, infringes their intellectual property, I, not Apple, am responsible for dealing with that claim.
You confirm that you are not in a country under a United States Government embargo or listed by it as a terrorist supporting country, and that you are not on any United States Government list of banned or restricted people.
Apple and its subsidiaries can enforce these terms against you.
Stopping
You can stop using the app at any time by deleting it. To stop payments, cancel your subscription as described under Subscriptions. I may withdraw the app, or any part of it, and may block your access if you break these terms.
Changes
I may update these terms. The latest version is always on this page, with its date at the top, and I will mention important changes in the app’s release notes. If you keep using the app after a change, you accept the new terms.
Law
These terms follow the law of Singapore, and any dispute will be handled by the courts of Singapore. This does not take away any consumer rights you have under the law where you live.
Contact
Chengyu Calendar is made by Fiachra (Fiki) MacFadden. For anything about these terms, or about the app and its Home Screen widget, email fiki@zhiyin.dev.