计算器-多开计算器 is a free utility and tools app available on iPhone. Developed by 明 郭, this app offers a range of features to enhance your experience. Whether you're using it on an iPhone or an iPad, the app is perfectly adapted to both portrait and landscape orientations, as well as split-screen mode.

With this app, you can open two calculators simultaneously on your iPhone and up to four calculators on your iPad. It also allows you to save your calculation history and even export it if needed. The app offers a variety of beautiful wallpapers to customize your experience. Additionally, you can easily copy calculation results, processes, and perform recalculations.

The app provides convenient features like long-pressing the input field or the "=" button to preview the calculation result. You can add a right swipe gesture to the input field to delete input content one by one, and a left swipe gesture to undo deletions. You can also copy the content of the input field with a single tap and paste numbers or arithmetic operations with a double tap. The app also offers key settings and personalization options.

Please note that the app offers a VIP membership subscription with a yearly price of 15 yuan. The subscription can be managed through iTunes/Apple ID settings and will be automatically renewed unless canceled at least 24 hours before the current subscription period ends.

For more information, you can refer to the app's privacy policy and terms of use, which are available on the developer's GitHub page. If you have any further questions or need assistance, you can contact the developer through the "Contact Me" section in the app or by sending an email to