1. Service Overview
Calto (hereinafter “the Service”) is a text-based calculator mobile application that allows users to perform calculations as naturally as taking notes.
These Terms of Service establish the basic provisions regarding the use of the Service. By using the Service, you are deemed to have agreed to these Terms.
2. Use of Service
2.1 Eligibility
The Service is available to all users aged 14 and above. Users under 14 require parental or guardian consent.
2.2 Account
Basic features of the Service can be used without an account. Some features may require account creation in the future. Users are responsible for the accuracy and security of their account information.
2.3 Prohibited Activities
The following activities are prohibited:
- Reverse engineering, decompiling, or attempting to extract source code
- Using the Service for illegal activities
- Interfering with normal operation of the Service
- Using the Service in ways that infringe on others’ rights
3. Paid Services
3.1 Plans
All features are currently available for free, including unlimited documents, real-time exchange rates, cryptocurrency conversion, and all themes.
A paid plan may be introduced in the future, which may change the scope of features available on the free tier. Any changes to plans will follow these principles:
- We will provide individual notice at least 30 days before the effective date through in-app notifications or email.
- Documents and data created by users before the introduction of paid plans will not be deleted, and viewing access will be maintained.
- If you do not agree to the changes, you may discontinue use of the Service. A reasonable period will be provided to export your data before discontinuation.
3.2 Payment and Refunds
If paid services are introduced, payments will be processed through Apple App Store or Google Play Store. Refunds follow the respective store’s policies. Calto does not directly collect or store payment information.
4. Intellectual Property
All content, designs, logos, software, and technology of the Service are the intellectual property of Calto or its licensors.
Users retain all rights to documents and calculations they create within the Service.
5. Disclaimer
5.1 Calculation Results
The Service is a convenience calculation tool and does not guarantee accuracy of results. Please consult professionals for important financial, legal, or medical decisions.
5.2 Exchange Rates and Cryptocurrency
Exchange rates and cryptocurrency prices are provided through external data sources (ECB, CoinGecko), and real-time accuracy is not guaranteed. This information does not constitute investment advice. Please use official financial information for actual transactions.
5.3 Service Availability
The Service is provided “as is” and uninterrupted service is not guaranteed. Service may be temporarily suspended for maintenance, updates, or force majeure events.
6. Limitation of Liability
To the maximum extent permitted by applicable law, Calto shall not be liable for any direct, indirect, incidental, special, or consequential damages arising from use of the Service.
7. Changes to Terms
These Terms may be modified as needed. The following applies to changes:
- General changes: Notice will be provided within the Service at least 7 days before the effective date.
- Changes unfavorable or material to users: Individual notice will be provided at least 30 days before the effective date through in-app notifications or email, specifying the details and reasons for the change.
If you do not agree to the modified Terms, you may discontinue use of the Service. Continued use after the notice period constitutes acceptance of the modified Terms.
8. Governing Law and Jurisdiction
These Terms shall be governed by the laws of the Republic of Korea, and disputes related to the Service shall be subject to the jurisdiction of Korean courts.
9. Contact
If you have any questions about these Terms, please contact us at: