Do you know JavaScript?

Name: Do you know JavaScript?
Author: Aleksei Kineev

LiveAleksei Kineev1 app · 48K installsEducationFreecom.doyouknowjs

Test your JavaScript skills

Alert me ★ Watch Open in Play ↗

Total installs: 47,983
Installs / day: 0
Rating: —★
Released: 24 Jul 2020
Last update: 26 Sept 2025
Countries: —

Install history

exact counter from Google Play

30dAll

Installs per day · last 90 days

Change timeline

No changes recorded yet. We compare every crawl with the previous one and list title, icon, screenshots, description, version, price and availability changes here.

Country availability

Availability has not been checked for this app yet. “Check all countries” looks the app up in about 140 Google Play storefronts and shows where it is live, listed but not installable, or missing — plus any country-specific (custom) store listings.

Top countries

Country data will be available soon.

We estimate where downloads come from using the app’s position in Google Play’s top charts in about 140 countries. This app is not in any chart we have collected yet; the estimate appears as soon as it is.

Top chart positions

Not in any tracked top chart.

App manifest

Read this app's manifest from Google Play: permissions, declared SDKs, components and AdMob app ID. Saved analysis appears here automatically.

Data safety

declared by the developer on Google Play

No data shared with third parties
No data collected

This is the developer's own declaration, summarised from the Play listing. The permissions below show what the app is technically able to access.

Permissions

6 in 3 groups

4 Sensitive0 Notable2 Routine

What this app can do with your phone

Read photos, videos, and other files saved in your phone's shared storage
Add, change or delete photos, videos and other files in your phone's storage

Photos/Media/FilesSensitive2

Access to photos, videos, music and other files stored on your device

Read photos, videos, and other files saved in your phone's shared storageread the contents of your USB storage · READ_EXTERNAL_STORAGE
Add, change or delete photos, videos and other files in your phone's storagemodify or delete the contents of your USB storage · WRITE_EXTERNAL_STORAGE

StorageSensitive2

Access to files, photos and media saved on your phone's storage

Read photos, videos, and other files saved in your phone's shared storageread the contents of your USB storage · READ_EXTERNAL_STORAGE
Add, change or delete photos, videos and other files in your phone's storagemodify or delete the contents of your USB storage · WRITE_EXTERNAL_STORAGE

OtherRoutine2

Access to miscellaneous device features that don't fit other categories

Connect to the internet to load content and send datafull network access · INTERNET
Receive push messages sent from the app's servers over the internetreceive data from Internet · com.google.android.c2dm.permission.RECEIVE

Sensitive = can reach personal data, location, camera/mic or act on your behalf. Notable = changes how your device behaves. Routine = normal for almost every app. Source: Google Play's permission list for all versions of this app.

Store listing

Full description

Learning JavaScript? Preparing for a developer position interview? Or maybe you're already actively writing in JS and want a small challenge? This application will help you assess your proficiency level in this programming language. You are provided with more than four hundred questions of various difficulty levels, covering all the current capabilities of the current JS standard. And it doesn't matter if some questions puzzle you - links to documentation and additional materials will help you understand why JavaScript behaves exactly this way. Level up your JS skills. Write good code. Don't stop at what you've achieved.

What's new

- Fixed syntax highlighting issues - Bug fixes and stability improvements

Growing in Education

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