Chemistry By Design v1.9
APK · 8.6 MB · version code 1009000 · Android 4.0+ · uploaded Apr 12, 2020
- Same certificate as v1.9.6, which matches Google Play Details
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Compared with the latest version
The latest version is v1.9.6, uploaded Aug 13, 2026 — about 6 years after this one.
- Size: this file is 8.6 MB; the latest is 21.8 MB (13.2 MB larger).
- Android: this version needs Android 4.0+; the latest needs Android 5.0+. Use this one if your device runs an older Android release.
- Both versions request the same permissions.
File information
- Version
- v1.9 (1009000)
- Uploaded
- Apr 12, 2020
- Size
- 8.6 MB
- Requires
- Android 4.0+ (API 14)
- CPU support
- ARM 32-bit
- Screen
- Small screens and larger
- MD5
- 0fe874ac5638a965c96f13d8d49f8090
- Signing certificate (SHA-1)
- 13:EC:2F:2B:51:B0:65:73:31:F9:A9:E9:A6:F6:4B:A4:81:9D:C0:D4
- Signed by
- CN=Gary Carstensen, OU=Office of Instruction and Assessment, O=University of Arizona, C=US
- File name
- air-edu-arizona-oia-sequence-1009000-51238893-0fe874ac5638a965c96f13d8d49f8090.apk
- Package
- air.edu.arizona.oia.sequence
- Downloads (all versions)
- 100K+
- Age rating
- PEGI 3 · Everyone
What's new in v1.9
Rebuilt with latest AIR SDK for minor improvements and increased compatibility.
Permissions (1)
This version requests 1 permission, none of them sensitive.
- Full network access android.permission.INTERNET
Security & authenticity
Security rating: Unknown
Signing certificate
- Certificate issued to “University of Arizona” This is the certificate of the Google Play version.
- Same certificate as v1.9.6, which matches Google Play v1.9.6 · v1.9.5 · v1.9.3
Store checks
- Developer signature not checked yet Apr 12, 2020
- Antivirus scan passed May 24, 2022
- Uploaded by “split-store” Gold tier · 24,358 followers · uploading since 2019
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (3 other versions compared). AAPKs doesn't scan files itself.
How to install Chemistry By Design on Android 4.0+
You'll need about 17.2 MB of free space.
- Download the APK — tap Download APK above (8.6 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 air-edu-arizona-oia-sequence-1009000-51238893-0fe874ac5638a965c96f13d8d49f8090.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 0fe874ac5638a965c96f13d8d49f8090. 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).
- Open Chemistry By Design — 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 4.0+). Download it again, or pick an older version.
- “App not compatible with your device” — this build contains native code for ARM 32-bit only. Devices with other processors can't install it.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.