isHUD -- A HUD for multilingual users.

If you use multiple input sources, usually you have to look at the upper-right corner of the screen to check which input source is in use. With the full screen mode of OS X, to check the current input source is not as easy as just move your eyes.

isHUD will help you out. It tells you which input source is in use, keeps your eyes on the center area of the screen, and your hands on the keyboard.

Now, just concentrate on your work.

With isHUD you can:
* Double-strike the Fn key to check the current input source (Command/Option can be assigned for this function as well.)

* Use one key as the shortcut to select the next input source

What’s New

Version 1.4.2

Major update for macOS Mojave.
For user who uses old macOS versions (10.8 - 10.13), please use isHUD v1.3.1.

- Enable running in macOS sandbox

- Minor fixes

With macOS Mojave, isHUD requires the Accessibility permission to be fully functional.

Ratings and Reviews

Jaina.wei ,

Improving productivity

If you think one-click input language switching is nothing, think again. For those work in a multi-lingual environment, the accumulated amount of time saved is huge, not to mention the responsive popup.

thewildshrew1950 ,


Simplifies something that drives me crazy. It's especially good for Japanese which has 3-4 different language inputs that tend to crowd up input sources…

Now Switching between Japanese, Korean and English isn't so much of a hassle.

3Kingdoms ,


This is way better than the language switcher built in to OS X which always feels like it's non-responsive. It should be super obvious - which this app does.


1.4 MB
macOS 10.14 or later, 64-bit processor
English, Japanese, Simplified Chinese, Traditional Chinese
Age Rating
Rated 4+
© 2011-2018 Yi Gu


  • Family Sharing

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