It is stored until you don't delete the browser's cache and cookies. Therefore, when you come back to the website then you don't need to change it again. Note: PPI numbers will be stored just on your web browser.

Lastly, you can use the 'Restore PPI' button to refresh all the settings.

Even more, you can change the Pixels per inch(PPI) to make the ruler more accurate and save it for future use.

Therefore, using this feature, you can measure the smallest accurate size of the object. When you change it to 1/32 then you can see the very small lines appear in between two inches. In order to accurately measure the length of your item, we strongly recommend that you calibrate this online ruler first, set the correct pixels. There are three graduations that you can choose: 1/8, 1/16, and 1/32. This is a convenient online ruler that could be calibrated to actual size, measurements in cm, mm and inch, the upper half is the millimeter ruler and centimeter ruler, the lower half is an inch ruler. Also, you can change the graduation of an inch. The upper side of the ruler is mm and cm.

As mentioned before, the ruler has a mm, cm, and inch scale.

So, after removing the object you can see the length clearly. You can click on the ruler to mark a red line.

For measuring, firstly, place the object near to the screen.Refer above section if you didn't do that. But we recommend you do the calibration process before using it for very accurate results. I-Ruler application you can try and download through the iTunes Store.

Compatible with iPhone 6S, iPhone 6S Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPad Pro (12.9-inch), iPad Pro (12.9-inch) Wi-Fi + Cellular, iPad Pro (9.7â?inch), iPad Pro (9.7-inch) Wiâ?Fi + Cellular, iPad (5th generation), iPad (5th generation) Wiâ?Fi + Cellular, iPad Pro (12.9â?inch) (2nd generation), iPad Pro (12.9â?inch) (2nd generation) Wiâ?Fi + Cellular, iPad Pro (10.5â?inch), iPad Pro (10.5-inch) Wiâ?Fi + Cellular, iPad (6th generation), iPad Wi-Fi + Cellular (6th generation), iPad Pro (11-inch), iPad Pro (11-inch) Wi-Fi + Cellular, iPad Pro (12.9-inch) (3rd generation), iPad Pro (12.9-inch) (3rd generation) Wi-Fi + Cellular, iPad mini (5th generation), iPad mini (5th generation) Wi-Fi + Cellular, iPad Air (3rd generation), iPad Air (3rd generation) Wi-Fi + Cellular, iPad (7th generation), iPad (7th generation) Wi-Fi + Cellular, and iPod touch (7th generation).It's very simple to use this virtual tool. type of ruler by clicking once on the screen. Additional Requirements Requires iOS 11.0 or later.

Iruler download