Chemistry Toolbox
v4.0 · 7.2 MB · code 40
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File information
UpdatedNov 11, 2025
PublishedMar 27, 2023
Packagecom.turvy.pocketchemistry
Versionv4.0 (40)
Size7.2 MB
MD549ccbe7f103c7c25e16232fc5486d1b1
Min SDK19
Malware scanTRUSTED
Signature SHA149:7C:A4:E6:BD:E7:9B:25:CE:E7:65:58:D4:C4:21:94:B9:56:D2:D6
SignerCN=Florent Breton, OU=Mobile Development, O=Topsy-Turvy, L=Ramonville, C=France
Total downloads100,000
This version100,000
DeveloperTurvy
Age ratingEveryone
What's new in v4.0
- new design, lighter and more modern
- new periodic table
- remove of ad click function
- new periodic table
- remove of ad click function
Security scan
TRUSTED
- Developer signature verified 2025-11-11
- Signature SHA1 49:7C:A4:E6:BD:E7:9B:25:CE:E7:65:58:D4:C4:21:94:B9:56:D2:D6
- File MD5 49ccbe7f103c7c25e16232fc5486d1b1
How to install Chemistry Toolbox v4.0 on Android 4.4 KitKat+
Takes about 2 minutes. You'll need roughly 7.2 MB of free storage.
- Grab com.turvy.pocketchemistry_40.apk — hit the Download button above (7.2 MB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
- Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
- (Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches 49ccbe7f103c7c25…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.turvy.pocketchemistry_40.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
- Check the signer — the install screen will name the publisher. For this build it should read CN=Florent Breton, OU=Mobile Development, O=Topsy-Turvy, L=Ramonville, C=France. If it doesn't match, cancel — you have the wrong file.
- Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
- Done — open Chemistry Toolbox — tap Open on the install screen, or find the Chemistry Toolbox icon in your app drawer.
Common install errors for Chemistry Toolbox
- "App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
- "Parse error" — the APK is for a newer Android than yours. This version needs Android 4.4 KitKat or later. Pick an older build from the versions list below.
- "There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.