Engineer Tools - Level & Ruler

Contains adsIn-app purchases
Content rating
Everyone
10+
Downloads
Content rating
Everyone
In-App Purchases
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About this app

Engineer Tools turns your phone into a set of everyday measuring tools: a bubble level, an angle finder, a compass, a true-size ruler and a protractor. It opens straight on a live level, with no ad at launch, and works offline.

BUBBLE LEVEL
• A circular level and horizontal and vertical vials, all live on one screen. Tap any of them to enlarge it.
• Arrows at the rim show which side to raise, and the level glows when you are within your tolerance.
• Sound guidance beeps faster as you get closer to level, so you can work without looking.
• Read tilt in degrees, percent, mm/m, in/ft or as a 1:n ratio, to 0.1° or 0.01°.
• Precise two-point calibration: take a reading, turn the phone 180° on the same spot and take another. It works on any surface.
• Hold or Auto-hold freezes a reading, a flashlight lights up dark corners, and the screen stays on while you work.
• Choose a fast, balanced or stable response.

ANGLE FINDER
• Measure the slope of a surface, or the angle of the phone's long edge.
• Set zero on any surface to measure relative to it.

COMPASS
• A compass card that turns to magnetic north, with the heading in degrees and as a direction, for example 245° Southwest.
• Works flat in your hand or held upright, and asks for a quick figure-8 when the sensor needs it.

RULER
• A true-size ruler down the whole screen: millimeters on one side, inches in sixteenths on the other.
• Drag two lines to measure between them in cm, in inches and to the nearest 1/16 in.

PROTRACTOR
• Drag the arms and the vertex to line them up with any angle. The reading shows in large type.
• One tap switches to the other side (360° minus the angle).

MADE FOR EVERYDAY USE
• Three themes: Glass, High contrast and Workshop.
• 25 languages, including right-to-left.
• Works offline. No account needed.

FREE, WITH OPTIONAL PRO
Engineer Tools is free with ads, and never shows an ad at launch. Pro is a subscription that removes all ads and unlocks every theme. New subscribers can try Pro free for 3 days, and can cancel any time in Google Play.

Good to know: a phone's sensors are accurate enough for hanging pictures, fitting shelves, leveling appliances and DIY projects. For safety-critical or high-precision work, check with a dedicated tool.
Bubble level, angle finder, compass, ruler and protractor in one fast app.
Updated on
Oct 6, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    App info and performance
  • No data collected
    Learn more about how developers declare collection
  • Data is encrypted in transit
  • Data can’t be deleted
  • Committed to follow the Play Families Policy

What’s new

First release! Bubble level, angle finder, compass, ruler and protractor in one fast app. Works offline. No account needed. Pro is a subscription that removes all ads and unlocks every theme. New subscribers can try Pro free for 3 days, and can cancel any time in Google Play.
Content rating
Everyone
In-App Purchases
Learn more

App support

About the developer
SECURE SYSTEM BYTES
moh.shraim@gmail.com
amman Jordan
+962 7 7796 6662

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