Army Knife for Android

17.7K reviews
Content rating
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About this app

This app contains a set of tiny tools: a unit converter, a compass (magnetometer required), a bubble level, a calculator, a stop watch, a timer, a magnifying glass, a mirror (front camera required), a ruler and a flashlight (app and widget).

Essentially it’s like an "Army Knife" Android app.

Each tool does what it is supposed to do. There's no space for special effects like 3d compass, talking level, psychedelic flashlight etc: the goal is to have a lightweight, fast and easy to use set of tools, one "tap" away from your home screen.

This app is the size of a common "standalone tool" like a compass, a flashlight or a magnifying glass. This way you'll save a lot of disk space. You'll save network consumption too, not only for the first download but for every update too.
It doesn't require network access, the permission to write on your flash memory or the permission to read your contacts.
If you find a bug, please contact us using the "Report a bug" main menu function.


- Depending on the hardware capabilities of your smartphone, some tools may not be present

- The permission to use the camera is required in order to turn on the camera flash LED. Some smartphones (for instance the Google Nexus S) don't light the flash LED if the camera is not running. If you check the most popular flashlight apps, you'll find out that they all require this permission. Android Army Knife doesn't shot any photos, doesn't save multimedia info onto the flash card and doesn't send anything on the internet: it doesn't require the network permission at all.

- This app was first released on may 2011 and since then is free and without banners!.
The Android robot is reproduced or modified from work created and shared by Google and used according to terms described in the Creative Commons 3.0 Attribution License.
Updated on
Dec 29, 2023

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.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

16.8K reviews
J Visuvius (Gaming Account)
December 6, 2023
Handy. Not sure if by design or a bug, but the alarm sound for the multiple timers does not go off unless the app is on top/ active. I.e. if you use your device for something else while you wait for the timer, it does not beep. I have tried a number of different settings, it just doesn't work. Got an error message today saying this app was developed for an older version of android and the app needs to be updated.
7 people found this review helpful
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A Google user
January 8, 2019
Fantastic. Just fantastic. This is an app that everybody needs on their phone; period. It's a collection of super useful tools that most people spend time in the app store separately, myself included; I found it by chance looking for a 2019 goals app, and I think it may become my favorite app. The "Ruler" tool is a little wonky because of the average phone's screen size, regardless though, download it; you won't regret it.
124 people found this review helpful
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A Google user
November 13, 2018
Lots of handy tools; flashlight, unit converter(how many centimeters in a mile, yep). A couple of the functions are a little silly, the ruler for instance. The levels work pretty well. You just have to take into account any curve in your case or protector. But for seeing if a picture is level, it works great. No annoying ads. Don't know what personal data they gather. Haven't noticed my battery draining faster since I installed the app. It does burn through a charge pretty quick using the flashlight function.
78 people found this review helpful
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What's new

Version 1.6.3
Dec 29, 2023

- Added compatibility with Android 14
- Timer: Added a context menu for each timer where you can:
Set the timer name
Reset the timer to zero
- Now it’s possible to choose set beep volume as ring, alarm or max
- Minor bugfixes
- Unit Converter:
Added “energy” category
Improved sorting of negative results
Fixed “Number of significant digits displayed” setting
- Improved translations: