FAQ Section: Companion and Emulator

Frequently Asked Questions
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Introductory

Your First App Testing - MIT

Breaking News:

Feb 17 2023 nb191 needs Companion 2.66 or 2.66u side load

Sep 22 2022 nb190 needs Companion 2.65 or 2.65u side load

Sep 2022 open beta emulator

June 2022 - Companion 2.63 PlayStore rollout hiccup - ewpatton

March 2022 - Please test Companion under https - Hal

Sept 2021 - Chrome 94 broke access to aiStarter

March 2021 - Chrome 89 broke Companion Connections - Fixed. - jis

Usage Techniques

Check the MIT Rendezvous server status - JIS

Connecting to App Inventor Emulator and Updating Companion - YouTube

Screen switching limitations in the Companion and Emulator - @Taifun

Switching to Landscape in the Emulator Ctrl-F11- Juan Antonio

How to use Logcat

Texting between multiple emulators - ewpatton

Other Emulators

Notes for Windows 11 Home users unable to install emulators - @ABG

GenyMotion

Android Studio emulator with AI2

Microsoft's free Visual Studio Android emulator

MemuPlay emulator setup and Companion startup - Italo, ABG

Light Weight emulator: Nox - AnirbanDev

MIT's 2021 beta version of their emulator

Androidx86
Use androidx86 as an emulator for AI2 - TIMAI2

Schools
School network setup for AI2 - SteveJG, MIT

Improved emulator setup - Troy Kozee

AI2 Silent Install Flags

There is a way to tell the emulator to use an http proxy - jis

Platforms

Chromebooks - MIT

Chromebook Companion setup - ewpatton

Ubuntu 10.04 instructions - SteveJG

Other

Companion App: install from unknown sources not working anymore - ewpatton

Delete Companion Files - Anke, TimAI2

How to Manually Update the Companion in the Emulator (when self-update fails) - Yong_Tang

Emulator.apk file Not Found Exception (ESET Antivirus)

Companion is using many UDP Ports on WebRTC connection

Companion Versions 2.53 vs 2.53u usage and improvements

Companion .apk link to MIT

Companion changes December 2018 - MIT

Emergency Companion 2.47 download link

Emulator get stuck

Emulator locked with passcode

Galaxy S7 USB connection needs RNDIS (USB-Ethernet) (not MTP) developer settings - TFO

How to run apk on Chrome with ARCWelder - Obsolete, Chrome dropped Apps.

[MIT AI2 Companion: NW.js + ARChon + Emulator.apk (windows) - Yong_Tang

URI is not absolute trying to read a Media //filename

Where to get the Emulator - Windows

YouTube video on Emulator Fix from Task Manager

Dead links

Debugging issues in running the App Inventor Setup Tools and the emulator on Windows (HAL)

4 Likes
Failed to connect to emulator
aiStarter update MIT AI2 Companion2 to 2.58au
MIT AI2 Companion: NW.js + ARChon + Emulator.apk [windows]
app installation error
Companion App: install from unknown sources not working anymore
Why does the sound for the Emulator does not work?
Problems with emulator, pls helpe me
Use android simulator Occurrence error
The start block is missing
App inventor2 installation (new emulator)
Runtime Error - Windows10
Companion issues if using extensions (on Android 13)
Hello please i need help
Companion issues if using extensions (on Android 13)
Issues with the new emulator
Can i use the emulator in windows 10 home?
I downloaded this but it`s not working properly
Not able to pass values between screens using get start value and open/close screens
Companion Disconnected Error
The emulator does not work on my computer
I need help with this error code, I'm using a kindle fire and a chromebook, I get this when I try to connect to my app
Dependent Websites
Java Error Error from Companion: java.lang.RuntimeException: invalid syntax in eval form: :8:1: caught exception in inliner for # - java.lang.RuntimeException: no such class:
The app you created will continue to stop. Quick Answer, please
I can't use Android emulator to test my app. Please assist
Loops and procedure problem
App Inventor emulator blank screen on Win10
Problems with connecting with emulator
Java Error Error from Companion: java.lang.RuntimeException: invalid syntax in eval form: :8:1: caught exception in inliner for # - java.lang.RuntimeException: no such class:
Why my "do it" in the right click is grey?
Android Companion unable to connect
There may be a problem with the sorting method of List
Emulator is not working + Runtime error while trying to open emulator
Emulator not connevting with aistarter
Emulator Has White Screen
Java Error Error from Companion: java.lang.RuntimeException: invalid syntax in eval form: :8:1: caught exception in inliner for # - java.lang.RuntimeException: no such class:
Runtime Error for a basic app in emulator
New component "Translator" problem?
Emulator does not work properly
Aistarter doesn't work
My emulator is not working
Nothing happens on the screen after I finish coding and press the buttons
Multiple emulators
My emulator stuck in Google logo
The aiStarter helper does not appear to be running!
Multiplayer rock paper scissors not working
MIT App inventor emulator android version too old
Why is there no https in App Inventor?
Emulator not opening
Why http://rendezvous.appinventor.mit.edu/ is down?
Is there any way to view error messages before the companion crashes?
Automatic update for emulator using aiStarter?
App Inventor texting gibberish
Ai companion on Samsung Tablet not working
AI Companion not connecting
Companion stuck after boot for Android Virtual Device (API31)
trouble with companion
AI starter 5554 emulator white screen only
6 digit code and my qr code
AI Starter install in AMD CPU computer unsuccessful
Proxy support? Emulator works fine - except browser app
Proxy support? Emulator works fine - except browser app
Proxy support? Emulator works fine - except browser app
Proxy support? Emulator works fine - except browser app
Installation aborted on windows 11
Install MIT AI2 on Amazon Fire HD 10
I am not able to use a firebase app on the emulator
Some Issues About My Emulator
Problems downloading and then using emulator in windows 10
Firebase connection with MIT (beginner)
I have installed my app of MIT app inventor in my computer in Android App Bundle .aab, but I am unable to open that file in my computer, which software will help to open that on my computer not on phone
Creating a repeating timer
New Windows installer Package is not getting downloaded
The emulator does not work with an application containing AI
Buttons are not working to switch between screens
Downloading the app inventor setup software
Windows AI2 Download Emulator link not working
Black screen problem
aiStarter not recognized anymore
How do you connect open trivia api with mit app inventor
How do you connect open trivia api with mit app inventor
Emulator App Help
Unable to download aia file in laptop
Is it just me, or does no one notice that the emulator is not running Android 8 Oreo?
I need help , How I can Installing App Inventor 2 on Windows?
Need problem solv
Is there a new emulator
aiStarter update MIT AI2 Companion2 to 2.58au
Uninstall aiStarter on Windows 10
How can i change the size from the Emulator?
New Connection problem (using Companion with Chrome and some other browsers)
MIT App Inventor Issue (using Companion)
Cant install emulator
Need Help After Download
Unable to download emulator for windows
Emulator - white screen
Не запускается эмулятор
MIT AI2 Companion has unexpectedly crashed
Error en el emulador
Blue stacks not supplying data to Google sheets
How can I read values from a Google spreadsheet?
Using App Inventor on mobile
Problem facing while using emulator
Emulator Is not working since 2 week
Need help with emulator!
Need help with emulator!
Trying to use a different emulator for App Inventor
Help a newbie with sending variables from arduino
Built In Google Sheets Component for App Inventor
I keep getting an error stating that mi aistarter is not recognized but it has worked in the past
Update companion on emulator
Testing AI Extensions on Non-Android platforms
Emulator package parse error
MIT App Inventor Setup is NOT responding
Can we fix the testing bugs and other issues
Erro Com Emulador App inventor
I wanna be able to test it on my laptop
Emulator and java errors and BLE
App Inventor Emulator Crashed
aiStarter Connect Emulator not working Windows 11
Specify different color for the current day only in day list items!
Delete companion files
Invoke: no method named `ShowTextDialog' in class java.lang.Boolean
Running as emulator
It takes so long to start the emulator
Emulator continuosly freezing
Emulator will not work
Trying to connect LG Stylo with Firefox (no QR code to scan with companion app
Responsive design with image sprites
The emulator does not work
Какой самый лучший эмулятор?
App Inventor Setup Software installation for Chromebook
Failed to connect to emulator
Can't connect to location and wi-fi on emulator
Bug firebase Gettag list
Andoid Studio emulator with App Inventor?
Mit App Inventor emulator doesn't work well
L émulateur ne fonctionne pas
AI Companion does not connect on phone
Windows 10 GPU Driver Issue
Issues with the new emulator