Calculation Master Pro app for iPhone and iPad

Calculator: with practical operations such as inserting notes and transferring results to human currency
Ruler, protractor: measurement tools that you need to use every day, accurate and convenient.

Subscriptions.
1. Users can only unlock all features, including unlimited access to the calculator, ruler, and protractor functions, after they have paid for a subscription.
2. The subscription fee is deducted from the users iTunes account upon confirmation of purchase, with a three-day free trial and automatic renewal at $39.99/year.
3. users can turn off auto-renewal 24 hours before the end of the current subscription, otherwise the subscription will be automatically renewed.
4. automatic renewal of the Apple ID of the subscription 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 the subscription service, i.e., they can go to their user accounts to set off automatic subscriptions after purchase.

Terms of Service：https://vciacsoym7.feishu.cn/docx/MGS8deQCcoO2yex4pGOcupPFnPh
Privacy Policy：https://vciacsoym7.feishu.cn/docx/J8XwdwX9souUd8xdD0rcUCEcned