Terms of Service — sandık
Effective date: May 11, 2026
Last updated: May 11, 2026
Version: 1.0
1. Parties and Acceptance
These Terms of Service ("Terms") form a contract between Yasin Çıralı ("Company", "we") and the natural person ("User", "you") who uses the sandık mobile application ("App", "Service").
By downloading the App and creating an account, you confirm that you have read, understood and accepted these Terms, the Privacy Policy and the KVKK Disclosure Document.
2. Description of the Service
sandık is a personal portfolio tracking tool for the following asset types:
- BIST stocks
- TEFAS investment funds
- Currencies (USD, EUR, GBP, etc.)
- Precious metals (gold, silver)
- Cryptocurrencies (where supported)
The App displays portfolio value, allocation, performance and (optionally) technical-analysis signals. The partnership feature allows two users to share their portfolios with mutual consent.
3. IMPORTANT NOTICE — Investment Advice Disclaimer
sandık IS NOT AN INVESTMENT ADVISOR, BROKER OR PORTFOLIO MANAGEMENT FIRM.
- The Company is not licensed by the Capital Markets Board of Türkiye (SPK) or any equivalent foreign authority.
- Prices, performance figures, signals and charts shown in the App are for informational purposes only.
- No content constitutes investment advice, buy/sell recommendation, or financial advice.
- We make no warranty as to the accuracy, timeliness, or completeness of the data; data from third-party providers (Yahoo Finance, TEFAS, etc.) is shown as-is.
- Make investment decisions in consultation with a licensed broker or investment advisor.
- The Company shall not be liable for any profit or loss resulting from investment decisions you make based on data displayed in the App.
This notice is acknowledged at first launch on a separate disclaimer screen; the acknowledgement is recorded as legal evidence.
4. Account
4.1 Account Creation
- You must be 18 or older.
- You must provide a valid email address.
- You must provide accurate and current information.
4.2 Account Security
- Do not share your password with anyone.
- You are responsible for the security of your password.
- If you suspect unauthorized access, immediately change your password and notify us at
sandikapp.destek@gmail.com.
- All actions performed on your account are deemed to be performed by you.
4.3 One Account
- One person may create only one account.
- You may not transfer or sell your account.
5. Partnership Feature
You may add another user as a "partner" within the App. When this feature is active:
- Your partner can see your assets, quantities and performance.
- You can see your partner's portfolio.
- The link starts only with mutual consent (invite-code system).
- You may end the partnership at any time.
Responsibility:
- Share your invite code only with people you trust.
- The Company is not responsible for data shared while a partnership is active.
- Once a partnership ends, data the other party previously saw may remain on their device.
6. Acceptable Use
You will NOT use the App to:
- Engage in unlawful activity
- Attempt unauthorized access to another's account
- Reverse engineer, decompile or hack the App
- Use scraping, bots or malware
- Send requests that overload the Company's infrastructure (DoS)
- Submit false or misleading information
- Harass, threaten or spam other users
- Conduct money laundering or terrorist financing
- Patch the App or use it on a modified APK / jailbroken device / emulator to evade detection
- Infringe copyright or trademarks
Violations may result in immediate, unannounced account termination.
7. Third-Party Services
The App uses third-party services such as Supabase (backend), Firebase (notifications), Yahoo Finance / TEFAS (price data). The Company is not responsible for outages, delays or errors of these services.
The terms of use of third-party data providers (including Yahoo Finance, TEFAS) apply. If data retrieval is temporarily blocked, we may offer alternative sources or manual entry.
8. Intellectual Property
- The design, code, logo, brand name and content of the App belong to
Yasin Çıralı.
- The "sandık" trademark, logo and visual identity are protected by copyright and trademark laws.
- You receive a non-exclusive, non-transferable, non-sublicensable license to download and use the App for personal use.
- Data you enter (your asset records) belongs to you; the Company may process this data only to provide the Service to you.
9. Service Changes and Termination
9.1 Company's Rights
- We may update the App with or without prior notice.
- We may remove features or add new ones.
- If we decide to terminate the Service entirely, we will give at least 30 days' notice and provide a way to export your data.
9.2 User's Rights
- You may delete your account at any time (Profile → Settings → Delete Account).
- Account deletion requests are processed within 30 days; all your data is permanently erased (except statutory retention — see Privacy Policy §7).
9.3 Company's Termination Right
We may suspend or delete your account without notice if these Terms are violated. We comply with lawful authority requests.
10. Limitation of Liability
To the maximum extent permitted by applicable law:
- The App is provided "as is"; all express and implied warranties are disclaimed.
- The Company does not warrant that the App will be uninterrupted, error-free or secure.
- The Company's total liability is limited to the amount you paid the Company in the past 12 months (zero for free use).
- We are not liable for indirect, incidental, special or punitive damages (lost profits, data loss, business interruption).
Exceptions: Damages from the Company's intentional misconduct or gross negligence; non-waivable consumer rights are not affected.
11. Indemnification
You agree to indemnify the Company against losses, lawsuits, costs and attorney's fees arising from your violation of these Terms (Section 6) or your harm to third parties.
12. Consumer Rights
Non-waivable rights under Turkish Consumer Protection Law No. 6502 (TKHK) cannot be limited by these Terms. Your right to apply to the Consumer Arbitration Committee or Consumer Court is reserved.
For EU consumers: Rights under GDPR and EU consumer law are reserved. EU online dispute resolution platform: https://ec.europa.eu/consumers/odr
13. Force Majeure
We are not liable for service disruptions caused by circumstances beyond our control: natural disasters, war, terrorism, epidemics, government decisions, internet infrastructure outages, third-party service outages.
14. Notices
All notices to us must be sent to sandikapp.destek@gmail.com.
Notices to you may be delivered via:
- In-app notification
- Email to your account address
- Push notification (if opted in)
and are deemed delivered on the sending date.
15. Assignment
- You may not assign your rights/obligations to a third party.
- The Company may assign rights and obligations to a successor in the event of merger, acquisition or restructuring; 30 days' notice will be given.
16. Severability
If any provision of these Terms is held invalid, the remaining provisions remain in effect.
17. Governing Law and Jurisdiction
- Governing law: Laws of the Republic of Türkiye
- Jurisdiction:
Istanbul Anatolian Courts and Enforcement Offices
For users with consumer status, the courts of their place of residence also have jurisdiction under TKHK.
For EU consumers, mandatory consumer-protection rules of the country of residence apply under Rome I Regulation.
18. Changes to Terms
If we change these Terms:
- We will notify you in-app and via email at least 30 days in advance.
- Material changes may require re-acceptance.
- If you do not accept the changes, you may delete your account.
- If you do not object within 30 days, you are deemed to have accepted the changes.
19. Contact
Yasin Çıralı
Istanbul, Türkiye
Email: sandikapp.destek@gmail.com
Web: https://yasincirali.github.io/sandikapp
These Terms are provided in [Turkish] and [English]. In case of discrepancy, the Turkish version prevails.