InstaSub APK Screenshots
InstaSub App Information
Download Sources
Device Configuration
Old Versions of InstaSub
| Version | Size | Min OS | Architecture | Release Date | Action |
|---|---|---|---|---|---|
| v3.0.3 | 18.1 MB | Android 16+ | Jun 26, 2026 | Download |
Split APKs Installation Guide
Some apps are distributed as Split APKs (multiple .apk files packaged together) to optimize resources. Standard Android installers cannot open them.
What's New in InstaSub
Minor bug fixes.
About InstaSub
The InstaSub mobile app provides a quick and easy way to view and accept jobs, post absences and request subs and manage absences.
Features include:
Substitutes can:
Accept/Decline jobs with a click
View Available Jobs, Scheduled Jobs and Past Jobs
View and update Notification Settings for email, text and push alerts
Teachers can:
Post Absences
View Scheduled, Past and Denied Absences
Post Internal Coverage Absences
Cancel Absences
Admins can:
Scheduling Sub Requests
Approve/Deny time-off requests
View Filled Jobs and Unfilled Jobs
Daily/Monthly Absence Reports
An InstaSub account with Substitute, Teacher, or Admin permission is required to use this app.
About InstaSub
In addition to our time tracking and employee scheduling solutions, InstaSub gives users the ability to offer a highly efficient way to manage absences for teachers. InstaSub continues to provide K-12 administrators with the functionality they need to ensure optimal staffing, centralized reporting, and automated notifications to streamline communication.
User Reviews
Hi, I just downloaded the app and it immediately goes to username and password. But it hasn't given me the option to set it up yet. How do I register an email and password on this app? Also, is there a monthly fee to use this app?
have tried numerous times to reset password & app keeps saying an email has been sent to my email, but it isn't happening. what can I do to access app?
App was working fine but now it freezes on the login. The screen just shows "Authenticating" indefinitely.
Not receiving notifications! Making me miss job opportunities, please advise of a fix ASAP thanks.
How to Download InstaSub APK
- Enter the package name
com.subzzappon the APK Downloader. - Select your device architecture (ARM64 recommended for modern devices).
- Click Download to get the merged APK file.
- Transfer and install the APK on your Android device.
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To install it, you first need to enable "Unknown Sources" in your Android device's security settings. After downloading the APK file from APKDER, tap it to begin the installation and follow the on-screen prompts.
Yes! As soon as the developer releases a new version of InstaSub, we will update and provide the updated APK on APKDER. You can simply download and install the new APK over the existing installation without losing your app data.
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A standard APK is a single installation package. An XAPK or Split APK contains multiple resource files (like OBB expansions or device-specific layout parts) packaged together. To install them, you can download splits individually or use dynamic helper tools like Split APKs Installer (SAI).
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