Arrim ONE can be used to measure the dimensions of straight lines, circles, angles and curves. It is also a leveling and dividing tool.

Arrim ONE supports both Imperial & Metric Unit System. You can measure in ft, inch, yard, mm, cm, and m. And you can also choose the maximum precision.

In some cases, ARRIM ONE can achieve the level of precision which is impossible for other tools. For example, if you want to measure the radius of a circle, because you are not sure where the circle centre is, the measurement with other tools may lead to a large deviation. ARRIM ONE can easily solve the problem with an algorithm based on the principle of three points defining a circle.

What’s New

Version 0.0.22

1. Improve straight line accuracy
2. Improve Distance function

Ratings and Reviews

4.4 out of 5
10 Ratings

10 Ratings

dalla53 ,

For an estimator… GAME CHANGER!

This will be my first review I’ve ever written for an app. I do estimates for landscaping and this has far and away changed my life. I estimate unusual shapes for sod, concrete, and planting areas all day every day and the tedious rolling the wheel, writing down the measurements, calculating everything at the end- over and over is truly mind numbing. This has changed everything. I measure very odd shaped pool decks, then I measure again, and somehow it can be as little as half a square foot difference over a 600 square-foot pool deck. When I measure twice it’s almost exactly the same. That gives me the confidence to know I’m not messing up. I told my wife if this thing breaks I’m buying 10 more. Sincere thanks!

crayison ,

Excellent Tool for any Adjuster

Wow....this gadget does a little bit of everything in regards to helping you get measurements effortlessly. I love how they want feedback and make changes to make our usage need more personable. Love the product.


Best tool for leveling

I used several professional laser and giro guided leveling tools, but this one is far more easy to use and no need to carry variable stands.


Arrim LLC
18.9 MB

Requires iOS 11.0 or later. 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, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, iPad Pro (9.7‑inch), iPad Pro (9.7-inch) Wi‑Fi + Cellular, iPad (5th generation), iPad (5th generation) Wi‑Fi + Cellular, iPad Pro (12.9‑inch) (2nd generation), iPad Pro (12.9‑inch) (2nd generation) Wi‑Fi + Cellular, iPad Pro (10.5‑inch), iPad Pro (10.5-inch) Wi‑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), iPad Pro (12.9-inch) Wi‑Fi + Cellular, iPad mini (5th generation), iPad mini (5th generation) Wi-Fi + Cellular, iPad Air (3rd generation), and iPad Air (3rd generation) Wi-Fi + Cellular.



Age Rating
Rated 4+
© Arrim LLC


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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