小硬件管家 vs cFormula

轻松释放你的空间，给手机更快更便捷的体验 使用我们的应用，您可以做到： • 立即移除所有无用的照片、视频和联系人 • 搜索和删除屏幕截图 • 搜索和删除相似图片 • 搜索和删除类似的动态照片 • 搜索和删除类似的连拍照片 • 搜索和删除类似的视频 • 搜索和删除重复联系人 • 快速删除联系人 【小硬件管家连续订阅会员说明】 
1.订阅服务：连续包年会员 
2.订阅周期：一个年 3.订阅价格：以iAP申请信息为准 
4.付款：用户确认购买并付款后计入iTunes账户。 
5.取消订阅：若需取消自动续费，请在当前订阅周期到期前至少24小时关闭自动续订，关闭后不再扣费若未在到期前24小时取消，将自动续订 
6.续订：连续包年会员到期前24小时，苹果会自动为您从iTunes账户扣除相应费用，成功后包年会员服务有效期自动延长一个周期 7.隐私政策：https://docs.qq.com/doc/DVkFKVWpJSldXSWFO 8.使用条款：https://docs.qq.com/doc/DVmtlbUZMclZob3Nt

Customize formulas and calculate at any time. I want to calculate using formulas, but most apps have built-in formulas. There are countless formulas in the world, and it is not easy to find the formula you need to use. Now you can create your own formula within 1 minute. Just 3 steps: 1. Take a photo or select a formula image in the album. 2. Add variables. 3. Enter an expression containing variables. The formula creation is completed, and the calculation is completed instantly by inputting the numerical value of the variable. 【 Main functions 】 ——Take pictures and crop them. ——Select an image and crop it. ——Set formula variables, support uppercase and lowercase letters in English and Latin, and support subscripts. ——A dedicated keyboard for expression input, simple and easy to use. ——Check the expression and prompt for incorrect positions. ——Number specific keyboard, clear and easy to use. ——Supports angle or radian calculation settings. ——Supports calculations such as arithmetic, exponent (power), root, trigonometric function, logarithm, etc. ——Support Scientific notation and factorial calculation. ——Supports constant inputs such as e and π. ——ICloud cloud synchronization creates formulas that are shared across multiple devices and can be used anytime. ——Support restoring after deletion. The deleted formula will be permanently deleted after 30 days. Tip: 1. The simplest formula is to have no images, no variables, and only expressions. You can use it to calculate mathematical formulas with fractions and multiple parentheses. Can be used all at once, next time clear the expression and input a new one. 2. The image of the formula is used to compare the input variable values during use. You can take photos of formulas on books, computer screens, or handwrite them. You can also use other software to edit screenshots of formulas. 3. The dedicated keyboard for expression input is for convenience and ease of use. You can also paste functions that the keyboard does not support in the expression input box, which may bring surprises.