Terms of Use

Last updated: 25 May 2026

Terms of Use

These terms apply to Armchair Engineering apps, websites and related services that link to or otherwise present these terms. By using our apps or websites, you agree to these terms. If you do not agree, you should not use them.

Some apps may also be subject to Apple's standard End User License Agreement, Google Play terms, or other platform terms. Some products, including Renvy and Student Timetable, have their own product websites and may provide product-specific terms or privacy policies. If an app has a separate license agreement or product-specific terms, those terms also apply and take precedence for that product to the extent they say something different.

Using our apps and websites

Subject to these terms and any applicable app store terms, we grant you a limited, non-exclusive, non-transferable license to use our apps for your personal or internal use on devices you own or control.

You must not:

copy, resell, redistribute or commercially exploit our apps or websites without permission;
reverse engineer, decompile or attempt to extract source code except where allowed by law;
remove copyright, trademark or other proprietary notices;
interfere with, damage or misuse our apps, websites, servers or related services; or
use our apps or websites in a way that is unlawful, harmful or infringes someone else's rights.

Purchases and subscriptions

Some apps offer paid downloads, in-app purchases, subscriptions, advertising-supported features or lifetime unlocks. Purchases made through the App Store or another app store are processed by that store provider, not directly by us.

For App Store subscriptions:

payment is charged to your Apple account at confirmation of purchase;
subscriptions renew automatically unless cancelled at least 24 hours before the end of the current subscription period;
renewal may be charged within 24 hours before the end of the current period;
you can manage or cancel subscriptions in your Apple account or App Store settings;
prices, durations, trial availability and features are shown in the app and on the App Store purchase sheet before purchase; and
cancellation of an active subscription generally takes effect at the end of the current paid period, unless Apple states otherwise.

Lifetime purchases or one-time unlocks provide access to the relevant paid features for the supported lifetime of that app or product, subject to these terms, platform rules and technical availability.

Changes to apps, features and availability

We may update, improve, remove, suspend or discontinue apps, websites, features or services from time to time. We aim to avoid unnecessary disruption, but we cannot guarantee that every feature or service will remain available forever.

Some features depend on third-party services, app stores, operating systems, internet access, account providers, cloud databases, cloud providers, APIs, AI or media-processing providers, market data, content feeds, podcast directories, advertising networks or platform capabilities outside our control. Those features may change, become unavailable or stop working if the relevant third-party service changes.

User content and feedback

You remain responsible for content you create, store, import, generate or share using our apps.

If you send us feedback, suggestions, bug reports or ideas, you allow us to use them to improve our apps, websites and services without owing compensation or attribution.

AI-generated or transformed content may be inaccurate, incomplete, unexpected or unsuitable for your intended use. You are responsible for reviewing outputs and making sure you have the rights and permissions needed for any content you submit, generate, save or share.

Privacy

Our handling of personal information is described in our Privacy Policy:

https://armchairengineering.com/privacy/

Character Keyboard and Full Access

Some keyboard-related apps or extensions may require Apple's Full Access permission to share settings, themes or other configuration with the parent app. Full Access is not used by us to record, transmit or collect what you type.

No financial, legal or professional advice

Some apps may display or generate calculators, conversions, reference information, market information, public-holiday information, podcast or media metadata, timetable or task information, images, video, text or other data. This information is provided for general convenience only and should not be treated as financial, legal, tax, medical, engineering, educational or other professional advice. You should verify important information independently before relying on it.

Warranties and liability

Our apps and websites are provided "as is" and "as available". To the maximum extent permitted by law, we disclaim warranties of merchantability, fitness for a particular purpose, accuracy, availability and non-infringement.

To the maximum extent permitted by law, Armchair Engineering is not liable for indirect, incidental, special, consequential or punitive damages, or for loss of data, profits, revenue, goodwill or business opportunity.

Nothing in these terms excludes, restricts or modifies any consumer guarantee, warranty or right that cannot be excluded under applicable law.

Intellectual property

Our apps, websites, names, icons, designs, text, graphics, code and other materials are owned by Armchair Engineering or our licensors and are protected by copyright, trademark and other laws. These terms do not transfer any ownership rights to you.

Termination

We may suspend or terminate access to our apps, websites or related services if you breach these terms, misuse our services, create legal risk, or if continued access is no longer practical or permitted.

Governing law

These terms are governed by the laws of Victoria, Australia, except where local consumer law requires otherwise.

Contact

Questions about these terms can be sent through:

https://armchairengineering.com/support/

Changes

We may update these terms from time to time. When we make changes, we will update the date at the top of this page. Your continued use of our apps or websites after changes are published means you accept the updated terms.