Guides, answers, and troubleshooting for CalcBoard. Everything you need to get the most out of your multi-panel calculator.
CalcBoard shows a guided tour on first launch. Here's what to expect and how to make the most of it.
CalcBoard launches with two calculator panels ready to go. Start calculating immediately — no account, no sign-up, no setup required.
Tap any panel card at the top of the screen to switch to it. Each panel keeps its own state, mode, and calculation history independently.
Long-press on the active panel to open the panel menu. Choose Basic, Scientific, Programmer, or Unit Converter. Each panel can run a different mode simultaneously.
Tap the + button to add panels. Free users get 2 panels. Premium unlocks up to 8 simultaneous panels on screen.
With Premium, long-press a panel and select "Push to tray" to send a result to the shared value tray. Tap any tray value to paste it into another panel.
Detailed guides for every mode and feature. Tap into the full power of your multi-panel calculator.
Standard arithmetic with a full expression editor. The foundation of every panel.
Advanced mathematical functions for students, engineers, and scientists.
Binary, octal, decimal, and hexadecimal with bitwise operations.
Real-time conversion across 10 categories with live currency rates.
Transfer results between panels without copying or retyping.
Every calculation is saved automatically so you never lose a result.
Open Settings (gear icon, top-right corner) to customize CalcBoard's look and feel.
| Theme | Light, Dark, or System default |
| Color scheme | 8 color schemes Premium |
| Button style | 6 keypad styles Premium |
| Number format | Auto, US (1,234.56), or EU (1.234,56) |
| Haptic feedback | Vibrate on every button press |
| Sound feedback | Key click sounds |
| Compact keypad | Smaller buttons, more display room |
| Fit to space | Auto-shrink buttons to fit available area |
Quick answers to the most common questions about CalcBoard.
Quick solutions for the most commonly reported issues.
Ensure you're signed into the same Apple ID or Google account used for the original purchase. Go to Settings → Upgrade to Premium → Restore Purchases. If it still doesn't work, restart the app and try again. Contact support if the issue persists.
Currency rates require an internet connection. If rates appear stale, check your connection and switch to converter mode again. Rates are cached for 12 hours, so you may see a slight delay. The converter shows the last-updated timestamp.
Go to Settings and toggle off "Compact keypad height" and "Fit keypad to space." This gives buttons their maximum size. In landscape mode with multiple panels, buttons are inherently smaller due to limited screen real estate.
If you have many panels open (6+), try closing unused ones to free up resources. Long-press a panel and select "Remove panel" to close it. CalcBoard is optimized for 60fps but many concurrent panels use more memory.
Questions, feedback, or feature requests — we'd love to hear from you.
Data requests, privacy questions, GDPR inquiries, or legal matters.
[email protected]We typically respond within 1–2 business days.