真好算 vs AR Protractor

计算器APP其实是一个很普通的应用程序，然而我发现大部分计算器工具的体验，却是一言难尽： 「要么是很难看，要么是很难用，要么是很简陋...」，始终都没能让自己满意。 于是，我决定自己动手开发了一个计算器：真好算。 真好算的定位：为普通用户提供极致的日常计算体验。不需要很复杂的功能（但要很实用），不需要很高大上的界面（但要很耐看），我觉得我目前是做到了。 真好算的所有功能都集中在首页，一键触达。计算数字按钮整体靠下，十分适合单手操作。 其中，我最喜欢真好算的一个功能是：首页顶部横条支持显示最近10次（可自定义数量）历史计算记录。它既方便了你的下一次参考，同时又不像其他计算器那样过度干扰界面，真正做到了兼具简洁和实用。 此外，计算器首页的中间位置，直接集成各种实用工具的功能入口，一键触达。例如：金额大写、年龄生日、日期倒数、房贷计算、货币汇率、单位换算、世界时钟、BMI计算等功能，同时支持按自己的喜好手动排序，方便又实用。 另外，最重要的是：无广告无弹窗。 真好算目前主要功能： - 计算步骤 - 计算记录 - 金额大写 - 年龄生日 - 日期倒数 - 货币汇率 - 房贷计算 - BMI计算 - 世界时钟 - 单位换算 联系开发者: linguny@gmail.com

AR Protractor is a portable measurement tool built on augmented reality that turns your phone into a portable rangefinder, protractor and volume meter. No extra hardware is needed — just open the camera and aim at a flat surface to get accurate measurement results instantly. ## Main Features • Rangefinder: Continuous single-point measurement with real-time display of segment length and total cumulative distance • Protractor: Calculate arbitrary planar angles via three-point measurement • Area Measurement: Two modes available — polygon and circle • Volume Measurement: One-tap calculation for cuboids, cylinders and irregular solids (frustum method) • Unit Conversion: Meters, centimeters, millimeters, feet, inches; cubic meters, liters, cubic feet, gallons • Marker Size Adjustment: Customize the size of measurement markers to suit your usage habits ## Premium Features Two unlocking options: yearly subscription (3-day free trial, cancel anytime, auto-renews yearly) or one-time purchase for permanent unlock. Unlock Angle Measurement, Area Measurement, and all volume features (Box / Cylinder), ad-free. ## Privacy & Support We value your privacy. All AR measurement processing happens locally on your device, and none of your environmental data will be uploaded. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/