Ratora — Terms of Use

Last updated: 15 August 2026

The app

Ratora is a unit converter for iPhone, published by TheKnack. Every unit family is free to use, without advertising, for as long as the app exists.

Ratora Pro

Ratora Pro is an auto-renewable subscription that adds the currency layer: exchange rates, a dated offline cache, a 30-day trend, Home and Lock Screen widgets, custom units, and the removal of the free tier's caps.

Ratora Pro is offered at $4.99 per month or $39.99 per year, each with a 7-day free trial. Prices in other territories are set by Apple's equivalents and are shown in the app before you buy.
Payment is charged to your Apple Account at confirmation of purchase.
The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the period ends.
You can manage or cancel your subscription in your Apple Account settings after purchase.
Any unused portion of a free trial is forfeited when you purchase a subscription.

About the exchange rates

Rates come from European Central Bank reference rates, retrieved through a public service. The ECB publishes them once per working day, around 16:00 CET. Ratora always shows the publication date and the age of the figures it is using. They are reference rates: they are not a live market quote, not a dealing rate, and not a price at which any transaction can be executed. Do not use them as the basis of a financial decision without checking the rate you will actually be charged.

No warranty on figures

Unit conversion factors are constants and are implemented and tested carefully, but Ratora is provided as-is. TheKnack is not liable for any loss arising from reliance on a figure the app displays.

Acceptable use

Do not attempt to reverse engineer, resell or redistribute the app.

Contact

theknack2020@gmail.com