Chemistry Lab v6.6
APK · 62.7 MB · version code 40066 · Android 8.0+ · uploaded Jan 20, 2026
- Signature matches the Google Play version Details
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File information
- Version
- v6.6 (40066)
- Uploaded
- Jan 20, 2026
- Size
- 62.7 MB
- Requires
- Android 8.0+ (API 26)
- CPU support
- Any (no native code)
- Screen
- Normal screens and larger
- MD5
- a4ff7763ddb0615813634fc6b0644da2
- Signing certificate (SHA-1)
- 1F:CF:FF:FF:D7:5A:C1:48:47:0E:3B:EB:7B:62:10:46:F8:31:6E:83
- Signed by
- CN=Ryan W Hart, OU=Indie, O=Electrolytic Earth, L=Lehi, ST=Utah, C=US
- File name
- com-electrolyticearth-chemistrylab-40066-73217752-a4ff7763ddb0615813634fc6b0644da2.apk
- Package
- com.electrolyticearth.chemistrylab
- Downloads (all versions)
- 100K+
- Age rating
- PEGI 3 · Everyone
What's new in v6.6
Fun organic chemistry mechanisms game and general chemistry flash cards.
Permissions (3)
This version requests 3 permissions, none of them sensitive.
- Control vibration android.permission.VIBRATE
- Read external storage (custom) ANDROID.PERMISSION.READ_EXTERNAL_STORAGE
- Write external storage (custom) ANDROID.PERMISSION.WRITE_EXTERNAL_STORAGE
Security & authenticity
Security rating: Trusted
Signing certificate
- Signature matches the Google Play version Checked by the source store on Jan 20, 2026.
- Certificate issued to “Electrolytic Earth” This is the certificate of the Google Play version.
Store checks
- Developer signature verified Jan 20, 2026
- Validated against Google Play Jan 20, 2026
- Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures. AAPKs doesn't scan files itself.
How to install Chemistry Lab on Android 8.0+
You'll need about 125.4 MB of free space.
- Download the APK — tap Download APK above (62.7 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-electrolyticearth-chemistrylab-40066-73217752-a4ff7763ddb0615813634fc6b0644da2.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 a4ff7763ddb0615813634fc6b0644da2. 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?”. If Google Play Protect shows a warning, read it before you continue: the source store rated this file Trusted, but only install apps from sources you trust. 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).
- Open Chemistry Lab — 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 8.0+). 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.