Questions, bug reports, or feedback are welcome via email.
How to Use
- Type a number with the digit keys
- Tap a unit from the category panel (Mass, Length, Speed, etc.)
- Choose an operator (+/-/×/÷) → number → unit →
= - The result is shown with its unit
FAQ
Q. Why does 3 kg + 5 m show an error?
Mass (kg) and length (m) have different dimensions and cannot be added. The app catches such impossible operations. If you meant multiplication (3 kg × 5 m), tap the "Use ×" suggestion to switch.
Q. Why is 30℃ + 20℃ equal to 50℃?
Temperatures are interpreted as deltas (differences) by default. An opt-in absolute-temperature API is planned for future updates.
Q. Is "≈ 0.5 rice bowls" for 100 kcal accurate?
It's a rough relatable estimate (using ≈ 168 kcal per bowl). Don't use this for precise nutritional tracking.
Q. How can I remove ads?
A one-time in-app purchase (¥150) hides banner ads. You can also restore the purchase from the settings screen after switching devices.
Q. Does the app use the network?
Calculation works fully offline. Network is used only for ad delivery and consent management (UMP).
Reporting Bugs
If you find a bug, please email support@fujibit.com with:
- Device model (e.g., iPhone 15 Pro / Pixel 8)
- OS version (e.g., iOS 17.4 / Android 14)
- App version
- Steps to reproduce