Welcome to Retro 3D Calculator support. Here you’ll find help with calculator features, premium skins, restore purchases, and common troubleshooting steps.
Core Features
- 3D Retro Calculator: Vintage-style buttons with press animation and sound feedback.
- Two-line Display: Main digits plus a context line showing the full calculation.
- Smart Memory: M+, M−, and MRC with classic auto-calc behavior.
- Replay & CHECK Mode: Review and step through past calculations.
- Advanced Functions: GT, MU, square root, sign change, and correction.
- Custom Skins: Download and select calculator skins, including premium designs.
Frequently Asked Questions
📌 How do I use CHECK or Replay mode?
After completing calculations, press the CHECK key to step through each operation. Replay AUTO can demonstrate calculations automatically for learning or demo purposes.
📌 Does the app work offline?
Yes. All calculator functions work fully offline. Internet access is only needed to download optional skins or view “Discover More.”
📌 How do premium skins work?
Premium skins can be previewed before purchase. Once purchased, they unlock fully and remain available across devices using the same Apple ID.
📌 How do I restore a purchase?
Open the Skin Selector and tap Restore Purchases. This restores all previous non-consumable purchases associated with your Apple ID.
📌 Why don’t the calculator buttons respond on a premium skin?
If a premium skin is selected but not purchased, the calculator enters preview mode. Complete the purchase to enable full functionality.
Troubleshooting
- Buttons feel misaligned: Recalibrate the active skin or reset calibration.
- Sound not playing: Check in-app sound settings and device mute switch.
- Skin download failed: Verify your internet connection and retry.
- App crash or freeze: Restart the app; reinstall if the issue persists.
Contact Support
If you have questions, found a bug, or want to suggest a feature, feel free to contact us.
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