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Mobile Ruler (Flying Ruler) is a practical utility that turns the device screen into a convenient on-screen ruler for quick length references and size comparisons. It is designed for everyday situations such as shopping, crafts, study or office work, helping users check approximate dimensions without reaching for a physical ruler. The app focuses on simple, straightforward use and is suitable for anyone who needs a handy measuring reference on the go. Interested users are welcome to download and install it from iOSIPA Software Network.