Chemistry By Design
v1.9.5 · 9.2 MB · code 1009005
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File information
UpdatedApr 21, 2026
PublishedApr 25, 2022
Packageair.edu.arizona.oia.sequence
Versionv1.9.5 (1009005)
Size9.2 MB
MD55219d02eea37d753c3b857fa3ffe7a12
Min SDK21
ABIsarm64-v8a
Malware scanTRUSTED
Signature SHA113:EC:2F:2B:51:B0:65:73:31:F9:A9:E9:A6:F6:4B:A4:81:9D:C0:D4
SignerCN=Gary Carstensen, OU=Office of Instruction and Assessment, O=University of Arizona, C=US
Total downloads100,000
This version100,000
DeveloperiHelpNYC
Age ratingEveryone
What's new in v1.9.5
Fixed scaling issue with newer sequences.
Rebuilt with latest AIR SDK for better performance and compatibility.
Rebuilt with latest AIR SDK for better performance and compatibility.
Security scan
TRUSTED
- Developer signature verified 2026-04-21
- Signature SHA1 13:EC:2F:2B:51:B0:65:73:31:F9:A9:E9:A6:F6:4B:A4:81:9D:C0:D4
- File MD5 5219d02eea37d753c3b857fa3ffe7a12
How to install Chemistry By Design v1.9.5 on Android 5.0 Lollipop+
Takes about 2 minutes. You'll need roughly 9.2 MB of free storage.
- Grab air.edu.arizona.oia.sequence_1009005.apk — hit the Download button above (9.2 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 5219d02eea37d753…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find air.edu.arizona.oia.sequence_1009005.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=Gary Carstensen, OU=Office of Instruction and Assessment, O=University of Arizona, C=US. 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 By Design — tap Open on the install screen, or find the Chemistry By Design icon in your app drawer (this build targets arm64-v8a devices).
Common install errors for Chemistry By Design
- "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 5.0 Lollipop 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.
- Works on one phone but not another — this build ships arm64-v8a native code. Devices with a different CPU will reject it.