This app uses the basic functions of the calculator to make the simplest, best calculator in the app store. And it can record the operation process completely, and can check and edit at any time. Designed with simplicity, usability and beauty in mind!

Elegant & Intuitive interface
Displays both the equation & the result at the same time
Supports many scientific functions
Multiple themes

Application subscription:
1. Subscription Service: Quarterly Member (3 months)
2. Subscription price: ￥58 / quarter for consecutive quarterly membership
3. Payment: After the user confirms the purchase and the payment is credited to the iTunes account
4. Apple iTunes account will deduct the fee within 24 hours before the expiration, and the subscription cycle will be extended by one after the successful deduction
5. During the subscription period, you can use all key sounds to calculate data
6. The subscription will be automatically renewed for the same price and period (one year) as before, unless the automatic renewal is closed at least 24 hours in advance before the end of the current subscription period
7. After purchase, users can manage subscription and turn off automatic renewal in account Settings.
For more information please go to: http://support.apple.com/kb/ht4098"

Please refer to the following links for terms of Service and Privacy policy:
Privacy policy: https://wy_sea.coding.net/s/44704472-8ea8-45c5-b906-37210f68b2f7
Service agreement: https://wy_sea.coding.net/s/244c8b01-f7c2-4330-9341-4606dc872366

The price is equal to the price of a subscription in DOLLAR terms specified in Apple's App Store Pricing Table.