Smart Tools® is the complete package of 6 individual apps. It has 6 sets below for a total of 15 tools. In a word, All-in-One.

Set 1. Smart Ruler Pro: length, angle, slope, level, thread
Set 2. Smart Measure Pro: distance, height, width, area
Set 3. Smart Compass Pro: compass, metal detector, GPS
Set 4. Sound Meter Pro: sound meter, vibrometer
Set 5. Smart Light Pro: flashlight, magnifier, mirror
Set 6. Unit Converter: unit

Paid / patched version

https://play.google.com/store/apps/details?id=kr.aboy.tools&hl=en

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Smart Tools V2.1.15 (8.98 MB)
NitroFlare Link(s)

https://nitroflare.com/view/21AC51B9BE3BE57/Smart.Tools.V2.1.15.rar?referrer=1635666

RapidGator Link(s)

https://rapidgator.net/file/e3a3c4926319eef3bdf157465871a31f/Smart.Tools.V2.1.15.rar