Duolingo - Learn Languages Free v999
APK · 2.8 MB · version code 999 · Android 6.0+ · uploaded Mar 10, 2026
- Signed differently from the Google Play version Details
The source store hasn't rated this file as safe (its rating is Unknown). Prefer a version rated Trusted. See other versions.
Quick check before downloading
Answer this to unlock the download. It keeps automated downloaders away.
Compared with the latest version
The latest version is v3.106.5, uploaded Mar 12, 2020.
- Size: this file is 2.8 MB; the latest is 19.7 MB (16.9 MB larger).
- Android: this version needs Android 6.0+; the latest needs Android 4.4+.
- The latest version asks for 18 more permissions: View Wi-Fi connections, Run foreground services, Find accounts on the device, Modify audio settings, Record audio (microphone), Prevent the device from sleeping, Modify shared storage, Launcher update count (custom)….
- The latest version no longer asks for: Internal broadcast protection (app-defined).
File information
- Version
- v999 (999)
- Uploaded
- Mar 10, 2026
- Size
- 2.8 MB
- Requires
- Android 6.0+ (API 23)
- CPU support
- Any (no native code)
- Google Play services
- Required
- Screen
- Small screens and larger
- Android TV
- Supported
- MD5
- 3317920d33078ca313e2f2838f3f78ee
- Signing certificate (SHA-1)
- 1B:DF:7A:AD:46:1A:C8:62:50:67:36:6A:F5:99:16:77:CF:B5:5B:5A
- Signed by
- L=p7qRmQu0uG7B, O=p7qRmQu0uG7B, OU=p7qRmQu0uG7B, CN=p7qRmQu0uG7B
- File name
- com-duolingo-999-73886437-3317920d33078ca313e2f2838f3f78ee.apk
- Package
- com.duolingo
- Downloads (all versions)
- 500M+
- Age rating
- PEGI 3 · Everyone
What's new in v999
Our mascot owl, Duo, is trading in his usual diet of mice for bugs this week. Yup, we’re squashing those pesky bugs to make the experience better for all of you.
For more Duolingo news, contests and product releases, follow us on Facebook, Twitter, and Instagram @duolingo.
Game data (OBB)
This app needs extra data files (16.4 MB) next to the APK. Their download links appear once the download is unlocked.
- Main OBB
- main.395.com.duolingo.obb (8.2 MB)
- Main OBB MD5
- 17064e812dd03eb244bafd19dd0b6b1f
- Patch OBB
- patch.396.com.duolingo.obb (8.2 MB)
- Patch OBB MD5
- f498408692a530572e0e2a96075f3ffd
Permissions (4)
This version requests 4 permissions, none of them sensitive.
- Control vibration android.permission.VIBRATE
- Full network access android.permission.INTERNET
- Internal broadcast protection (app-defined) com.duolingo.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
- View network connections android.permission.ACCESS_NETWORK_STATE
Security & authenticity
Security rating: Unknown
Signing certificate
- Certificate issued to “p7qRmQu0uG7B” Not the developer's name (“Duolingo”). Names in certificates can't be verified, so this alone proves nothing.
- Signed differently from the Google Play version v3.78.2, which matches Google Play, uses another certificate. Android normally won't update an installed Play Store copy with this file. v3.78.2
Store checks
- Developer signature not checked yet Mar 10, 2026
- Uploaded by “njgh54r” uploading since 2026
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (6 other versions compared). AAPKs doesn't scan files itself.
How to install Duolingo - Learn Languages Free on Android 6.0+
You'll need about 22 MB of free space (the APK plus 16.4 MB of game data).
- Download the APK — tap Download APK above (2.8 MB). Chrome shows “File might be harmful” for every APK file; choose Download anyway only if you trust this file.
- Open the file — tap the download notification, or open Files › Downloads and tap com-duolingo-999-73886437-3317920d33078ca313e2f2838f3f78ee.apk.
- Allow the install (first time only) — Android 8 and later asks for permission the first time an app opens an APK: tap Settings in the prompt, turn on Allow from this source, then go back. Manual path: Settings › Apps › Special app access › Install unknown apps (on Samsung: Settings › Apps › ⋮ › Special access). On Android 7 and older: Settings › Security › Unknown sources.
- Check the file (optional) — the MD5 of the downloaded file should be 3317920d33078ca313e2f2838f3f78ee. If it differs, the file is damaged or was changed: delete it and download again.
- Tap Install — Android asks “Do you want to install this app?”. This file has no malware rating from the source store. If Play Protect warns about it, tap Cancel. If an earlier version is installed, this one only installs as an update when it is signed with the same certificate (SHA-1 shown above).
- Copy the game data — before the first launch, move the OBB files (16.4 MB), without renaming or unzipping, into Android/obb/com.duolingo/. On Android 11 and later many file managers can't open that folder; use the built-in Files app or copy it from a computer over USB.
- Open Duolingo - Learn Languages Free — tap Open on the install screen, or find it in your app drawer.
Common install problems
- “App not installed” — a version signed with a different certificate, or a newer version, is already installed (Android doesn't allow downgrades). Uninstall it first; back up your data, because uninstalling deletes it.
- “There was a problem parsing the package” — the file is incomplete, or your Android is too old (this version needs Android 6.0+). Download it again, or pick an older version.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.