Contact the Fibonacci Calculator team
Write to the VSB DEVS developers directly. Every message lands in one inbox they read themselves, and you get a reply within two business days.
vsbdevs@gmail.comChoose a topic
Tap a card to open your email app with the subject and a short checklist already filled in.
App crashes and bugs
Tell us if the app crashed, froze or stopped responding. Include your phone model, your Android or iOS version, the app version and the steps that led to the problem.
Report a bugCalculation questions
Write to us if a level doesn't match what you expected. Send the calculator you used, the High Price and Low Price you entered and a screenshot of the result.
Report a calculationFeature requests
Have an idea for the app? Tell us what it is and how you would use it, so we can decide what to build next.
Suggest a featurePremium and billing
Google Play and the App Store handle every purchase, so start any refund or cancellation with the store. If Restore Purchase doesn't bring back Premium, email us with the details.
Ask about billingPrivacy and data
Ask how the app uses Firebase, how ads and Premium work or how to make a GDPR or CCPA request. The app has no accounts, so we cannot look up any data by name or email.
Ask about privacyPress and partnerships
Contact us about app reviews, trading education content or creator collaborations. Include your idea and a rough timeline.
Start a conversationWhat to include in your email
Get a calculation question answered in one reply by including the exact prices. The Contact Us screen in the app adds your app version and phone details for you.
- Your phone model and OS version, for example Pixel 8 on Android 15 or iPhone 15 on iOS 18
- The app version, which you can find on the app's page in Google Play or the App Store
- The calculator you used and the exact High Price and Low Price you entered
- Whether you used the standard levels or your own Custom Levels
- A screenshot or screen recording of the problem
Response time
We reply within two business days.
Language
We reply to every email in English.
Refunds
Google and Apple process every purchase, so start a refund with the store you bought from. If you need our help, send your device, the store you used and the date and time of the transaction with a screenshot. Please add your country, your timezone and the reason for the refund.
What we cannot help with
We cannot give trading advice or tell you which trade to take. The app has no accounts, so we also cannot look up account details. Our terms explain why we never give trading advice.
Common questions
Does the app tell me when to trade?
No. It works out Fibonacci retracement and extension levels from your two prices and leaves every trading decision to you.
Read the FAQWhy do my Custom Levels no longer show?
Your Premium plan may have ended. The app keeps your saved levels but pauses them and uses the standard levels. Subscribe again or tap Restore Purchase, and your levels come back.
See Free and PremiumGoogle Play says I have already subscribed. What should I do?
Don't worry. Your subscription and its billing keep working as intended. The message comes from the Play Store's side. Tap Restore Purchase in the app to bring Premium back.
Read the subscription termsWhat data does the app collect?
The app does not ask for your name or email and it does not track you. It uses Firebase for analytics and crash reports so we can fix bugs.
Read the privacy policyRate the app on Google Play or the App Store
If Fibonacci Calculator helps your trading, a rating on the store helps other traders find it.