Ring Sizer — Last updated: 14 September 2026
These Terms of Use (“Terms”) are an agreement between you and GÜNAYDIN APP STUDIO YAZILIM HİZMETLERİ LİMİTED ŞİRKETİ (“we”, “us”, “our”) for the use of the Ring Sizer app (“the App”). By downloading or using the App you agree to these Terms and to our Privacy Policy. If you do not agree, do not use the App.
You must be at least 13 years old (or the minimum age required in your country) to use the App. If you are under 18, you confirm that a parent or guardian has agreed to these Terms on your behalf.
The App estimates ring sizes in three ways: by matching an on-screen circle to a ring, by matching an on-screen outline to a finger, and by measuring a finger with the camera after calibrating with a standard-size card. Results are shown in common regional standards (US/Canada, EU/ISO, UK/Australia, Japan/China) and can be saved on your device.
Ring sizes produced by the App are estimates for guidance only. Accuracy depends on your device’s screen, on how precisely you place and align the ring, finger or card, on lighting, and on natural changes in finger size during the day. Different manufacturers and jewellers also round sizes differently.
Before buying, resizing or ordering a ring, confirm your size with a professional jeweller or a physical ring sizer. We are not responsible for rings, purchases, alterations or other costs based on a measurement from the App, and we do not guarantee that any result is accurate or fit for a particular purpose.
The camera mode asks you to place a standard plastic card in the frame purely as a size reference. The App only detects the card’s outline; it does not read or keep any information printed on the card, and images are processed on your device and discarded. You choose which card to use. You may use any card of the standard ID-1 size, place it face down, or cover its details. You are responsible for keeping your card details private while using the camera.
Some features of the App are free; others require a premium purchase. Prices are shown in the App before you buy and may vary by country and over time.
Premium is offered as an auto-renewable subscription (for example weekly, monthly or yearly plans) and may include a free trial or an introductory price. The following applies to subscriptions bought through the App:
Prices, plans and the features included in premium may change. Changes take effect for renewals after we have given notice as required by Apple.
You may use the App for personal, non-commercial purposes in accordance with these Terms and Apple’s App Store terms. You may not copy, modify, reverse-engineer, resell or redistribute the App, interfere with its operation or with the services it relies on, or use it for any unlawful purpose.
The App, including its design, code, text, illustrations and trademarks, is owned by us or our licensors and is protected by copyright and other laws. We grant you a limited, revocable, non-exclusive, non-transferable licence to use the App on Apple devices you own or control, as permitted by Apple’s usage rules.
Purchases are processed by Apple, and subscriptions are managed with the help of Adapty, our subscription provider, as described in the Privacy Policy. Those services are subject to their own terms. We are not responsible for services we do not operate.
The App is provided “as is” and “as available”. To the fullest extent permitted by law, we disclaim all warranties, express or implied, including fitness for a particular purpose, accuracy of measurements and uninterrupted or error-free operation.
To the fullest extent permitted by law, we are not liable for any indirect, incidental, special or consequential damages, or for any loss arising from reliance on a measurement, purchase or decision made using the App. Our total liability for any claim relating to the App is limited to the amount you paid us for the App in the twelve months before the claim. Nothing in these Terms limits liability that cannot be limited under applicable law, or your statutory consumer rights.
You may stop using the App at any time by deleting it. We may suspend or end your access if you breach these Terms. Sections 3, 7, 9, 10 and 13 survive termination.
We may update, change or discontinue features of the App. We may also update these Terms; the updated version will be posted on this page with a new “Last updated” date, and continued use of the App after that date means you accept the updated Terms.
These Terms are governed by the laws of the Republic of Türkiye, and the courts of Istanbul have jurisdiction, without affecting any mandatory consumer protection rights you have in your country of residence.
The App is distributed through Apple’s App Store. These Terms are between you and us, not Apple. Apple has no obligation to provide maintenance or support for the App, is not responsible for any product warranty, claim or intellectual-property claim relating to the App, and is a third-party beneficiary of these Terms with the right to enforce them against you. Apple’s Licensed Application End User License Agreement also applies to your use of the App.
GÜNAYDIN APP STUDIO YAZILIM HİZMETLERİ LİMİTED ŞİRKETİ
Email: hello@gunaydinappstudio.com