Jeweler Calculator

Terms of Use

Revision of October 29, 2026 · Русский

Translation from Russian. In case of discrepancy, the Russian text prevails.

1. What this agreement is about

This agreement is concluded between you and the Rightholder of the “Jeweler Calculator” application and the jewelercalc.ru website. The Rightholder's details are given at the end of this document.

It sets out the terms of use of the application and the website (hereinafter, “the Service”): who may use it, what may and may not be done, who owns the application and the reference materials, and what the Rightholder is not liable for.

This agreement does not govern payment for the Premium subscription. That is covered by a separate document, the Public Offer. The application itself is free of charge.

The Personal Data Processing Policy applies together with this agreement.

2. How the agreement is accepted

The application asks you to accept the documents by a separate action: on first launch, when you register an account, and when a new revision requiring consent is released. By indicating your consent, you accept this agreement in full. If you have an account, the server records the date and the exact revision you accepted; without an account, the mark is stored on the device. Revisions are never amended retroactively; each one is kept on the website at a permanent address.

If you disagree with any term, do not use the Service, and if you already have an account, delete it.

3. Who may use the Service

The Service may be used by a person with full legal capacity who has reached 18 years of age. By accepting the agreement, you confirm this.

The Service is not intended for minors. If it turns out that an account was created by a person under 18, it will be deleted together with its data.

4. Account

The calculators and reference guide can be used without an account. An account is required for the Premium subscription and, together with Premium, for storing the order diary on the server: access is tied to the account and is available on the devices where you are signed in to it — on no more than three at the same time. A device on which the subscription was taken out in an app store does not count towards this number. An extra device can be turned off in the app (“Settings” → “Account”); see the Public Offer for details.

An account is created with an email address and password — registration is then completed by confirming the address — or by signing in with Google or Apple. With Google or Apple, the account is the email address they provide.

An account is personal, one per person. Keep your password secret and do not share it with anyone. Everything done under your account is deemed to have been done by you until you notify us that you have lost access to it. If you notice someone else signing in, write to support@jewelercalc.ru, and we will help you change your password.

You may not give other people access to your account, sell it, or use someone else's account. You are responsible for the accuracy of your email address: service emails are sent to it, and, when paying by card, the receipt as well.

5. Right to use the application

The Rightholder grants you a simple (non-exclusive) royalty-free licence to use the application in all countries where it is available, for the term of this agreement: to install it on your devices, run it and use it personally, including in your professional activities, for calculations relating to your own work.

The following is not permitted:

• copying, distributing, renting out or transferring the application or any part of it to other persons;
• modifying, decompiling, disassembling or reverse engineering the application, except in cases expressly permitted by Article 1280 of the Civil Code of the Russian Federation;
• circumventing technical restrictions, including subscription and purchase verification;
• removing or altering copyright notices and references to the Rightholder;
• creating derivative products based on the application;
• providing access to the application or its features to other persons as a service.

The application may be updated. Installing an update may be required to continue using it, since an old version may stop being able to communicate with the server.

If the application was installed from an app store (Google Play, App Store, RuStore or another), it may also be used only in accordance with the rules of that store. The agreement is concluded between you and the Rightholder. The app store is not a party to it, is not responsible for the application or its content, is not obliged to provide support for it and does not handle claims relating to it: such claims are handled by the Rightholder. With respect to the application installed from the App Store, Apple and its subsidiaries are entitled to enforce this agreement as third parties for whose benefit it is concluded (Article 430 of the Civil Code of the Russian Federation).

6. The application and reference materials

The program code, calculation formulas and algorithms, the reference guide to metals and stones, texts, images, design and structure of the application are objects of copyright and databases. They belong to the Rightholder or are used by it on a lawful basis.

Without the Rightholder's written permission, you may not:

• extract the reference guide and other materials from the application in whole or in substantial part;
• publish them, sell them or use them in your own products.

Infringement of the exclusive right entitles the Rightholder to claim compensation under Article 1301 of the Civil Code of the Russian Federation.

7. Your data in the application

Calculations, calculation history and settings are stored on your device, and the Rightholder does not receive them. The safety of this data depends on the device: deleting the application, resetting or losing the phone destroys it unless you have enabled backup. The backup is stored in your Google account on Google's terms. The Rightholder has no access to it and cannot restore it if it is lost.

Order diary. If you are signed in to an account and have active Premium, orders, craftsmen and the metal stock are stored on the server and are the same on every device where you are signed in. Photos of orders stay on the device where they were added. Without an account or without active Premium, the order diary is stored only on the device, like calculations. If Premium has ended, what is stored on the server is kept for as long as the account exists and syncs again after renewal.

The rights to the contents of the order diary remain yours. The Rightholder keeps it for as long as the account exists, including after Premium ends. A deleted record is kept in the trash for 30 days, where it can be restored, and is then deleted permanently. When the account is deleted, the order diary is deleted from the server entirely — save what you need beforehand.

Instruction to process personal data. If you enter information about customers, craftsmen and other people in the order diary — name, phone, email address and whatever else you record about them in an order — you are the operator of this personal data. By accepting these Terms, you instruct the Rightholder to process it on the following conditions (Article 6(3) of Federal Law No. 152-FZ of 27.07.2006 “On Personal Data”):

• purpose — storing the order diary in your account and synchronising it between your devices;
• actions — recording, storage, retrieval and transfer to your devices, updating according to your changes, deletion and destruction, by automated means;
• the Rightholder keeps this data confidential, does not use it for its own purposes, does not contact the people it concerns, does not disclose it to third parties other than the hosting provider and the backup storage in Russia, and does not view it except when you yourself ask for this in a support request;
• the Rightholder ensures its security by the measures listed in Article 19 of Law No. 152-FZ and in Section 9 of the Privacy Policy, stores it in Russia and informs you of any unauthorised access to it, should it occur;
• the instruction remains in force for as long as the account exists; when it is deleted, the data is destroyed. You delete individual records yourself.

As the operator of this data, you:

• enter only what is needed to work on the order and have a legal basis for doing so — as a rule, performance of a contract with the customer, and otherwise the person’s consent;
• do not enter passport details or other identity documents, health information or other special categories of personal data, or biometric data;
• are responsible to the people about whom you have entered information and answer their requests yourself — the Rightholder will forward such a request to you if it reaches the Rightholder and names you.

8. What you may not do with the Service

• interfere with its operation, create excessive load, or attempt to gain access to other people's data or to service sections;
• retrieve the Service's data automatically, by programs, scripts or bots, bypassing the application;
• distribute malicious software through the Service;
• impersonate the Rightholder or its representative.

9. Calculations are for reference only

The application is a tool for auxiliary calculations. Its results are for reference and guidance only: they depend on the values you enter, rounding, the assumptions made and the reference data, and do not replace professional knowledge, experience and your own verification.

Metal quotes and exchange rates are shown according to data from external sources, may be delayed and do not constitute an offer to buy or sell metal at the stated price.

The decision to apply a calculation result in your work (when buying metal, making a piece, or pricing for a customer) is yours alone, and you verify the result yourself.

10. Operation of the Service

The Rightholder strives to keep the Service running without interruption, but provides it “as is” and does not guarantee continuous and error-free operation: failures, maintenance breaks and changes to the set of features are possible.

The free version of the application displays advertising. It is shown by the Yandex advertising network; the advertiser is responsible for the content of the advertising. With the Premium subscription, no advertising is shown.

Sign-in, payment, quotes and certain features require internet access. Data traffic, mobile service and roaming are paid for by you and are not related to the cost of the subscription.

The Rightholder is not liable for:

• the operation of communication networks, equipment and operating systems;
• the actions of app stores, payment systems, telecom operators and government authorities, including restriction of access to services and network addresses;
• restrictions caused by sanctions and by decisions of foreign companies;
• the operation of the Service on devices with a modified operating system (root, jailbreak) and on unofficial builds of the application.

11. Liability

The parties are liable to each other within the limits established by the laws of the Russian Federation. The Rightholder is not liable for lost profits and indirect losses, including those arising from the use of calculation results, and the amount of its liability is limited to the cost of the subscription for the period in which the grounds for the claim arose.

The rights granted to you as a consumer by law are not limited by this section and apply independently of it.

12. Termination

You may leave at any time: delete your account or write to support@jewelercalc.ru. Deleting the account does not cancel a subscription purchased through an app store; its renewal is cancelled in the store's settings.

The Rightholder may restrict or terminate access to an account if the user's actions violate the law, the rights of other people or this agreement, in particular when subscription verification is circumvented or the account is transferred to other persons. In that case, refunds are made only in the cases described in the Offer. The rights granted to you as a consumer by law are not limited by this section.

If the Rightholder discontinues the Service, it gives at least 30 days' notice. Paid and unused subscription periods are refunded in the manner described in the Offer.

13. Changes to the agreement

Each revision is published on this page and kept in the archive at a permanent address, so you can always see what applied previously and exactly what you agreed to.

If the changes are material, the application will ask you to accept the new revision. In other cases, continuing to use the Service after publication constitutes acceptance of the changes.

The Russian text of the agreement prevails. This English version is a translation provided for convenience; in the event of any discrepancy, the Russian text applies.

14. Governing law and dispute resolution

The relations of the parties are governed by the law of the Russian Federation.

We first try to resolve a dispute by correspondence: send a claim to support@jewelercalc.ru, and you will receive a response within 30 calendar days. If no agreement is reached, the dispute is considered by a court in accordance with the laws of the Russian Federation; as a consumer, you may bring an action in the court at your place of residence.

15. Details

The Rightholder of the “Jeweler Calculator” application and the jewelercalc.ru website is Aleksandr Valerievich Pankratov, payer of the professional income tax (self-employed), email address support@jewelercalc.ru.

Revision of October 29, 2026.