Simple, versatile scientific calculator, professional calculator software.

Subscription:
1、Users can only go to unlimited use of calculator functions, additional altitude measurements, English case conversion, etc. through a paid subscription;
2、Subscription fee will be deducted from the iTunes account when the user confirms the purchase, free trial for three days, can automatically renew the subscription, renewal $39.99/year;
3、Users can turn off the auto-renewal subscription 24 hours before the end of the current subscription, otherwise the subscription will be automatically renewed;
4、Auto-renewal of subscription Apple ID, will be automatically deducted from the iTunes account 24 hours before the expiration of each billing cycle and extend the corresponding validity period;
5、Users manage their subscription services, i.e., they can go to their user account settings to turn off automatic subscriptions after purchase.

User Agreement: https://vciacsoym7.feishu.cn/docx/RX0WdS93row5Xyx80TIcrpmrnIc
Privacy Policy: https://vciacsoym7.feishu.cn/docx/Ld8ZdI5pFohplYxvkaCcdTfZnj5