Support

NumJam Support

Need help with NumJam? I can help with calculator behavior, sound playback, instrument selection, recording, Pro access, restore purchases, and bug reports.

Contact

Email lnguyen@plnguyen.com. Typical response time is 1-2 business days.

To help me debug faster, please include:

• Device model, such as iPhone 15 Pro or iPad Pro 11-inch
• iOS or iPadOS version
• NumJam app version
• Which calculator type you were using: Classic or Scientific
• Selected instrument and whether mute was enabled
• What happened, what you expected, and screenshots or a short recording if possible

Common Topics

• Restore Purchases: If you already paid for Pro, open Settings or the paywall and tap Restore Purchases. Make sure you are signed into the same Apple ID used for purchase.
• No sound: Check the mute button in NumJam, the in-app volume slider, device volume, Silent Mode, and connected Bluetooth audio devices.
• Scientific calculator is locked: Scientific Calculator is a NumJam Pro feature. Start or restore Pro access to unlock it.
• Instrument is locked: Some instruments are included with Pro. Free users can still use available free sounds.
• Recording issue: Recordings capture calculator key presses and selected instruments. If playback sounds wrong, include the calculator setup and selected instruments in your message.
• Note badges: Note badges such as C3 or C4 are off by default. Enable Show note badges in Settings if you want visible note labels while playing.

Refunds and Purchases

All purchases, subscriptions, restores, and refunds are handled by Apple. If you need a refund, request it through Report a Problem.

Privacy

NumJam stores calculator settings, sound preferences, trial status, and recordings on your device. Read the privacy policy for full details.

Terms

Read the NumJam Terms of Use (EULA) for subscription, billing, license, and usage terms. The app also uses Apple's Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/.

App Info

• App name: NumJam: The Musical Calculator
• Platform: iOS and iPadOS