InstaSub vs John Rex Charter School
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
InstaSub
This app streamlines job management for educators and administrators. It allows substitutes to easily accept or decline jobs, while teachers can post and manage absences. Administrators benefit from efficient scheduling and reporting tools.
- Accept/Decline jobs
- View job history
- Post and manage absences
- Schedule substitute requests
- Approve/Deny time-off
- Absence reporting
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The InstaSub mobile app provides a quick and easy way to view and accept jobs, post absences, 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.
John Rex Charter School
Stay informed about school events, receive customized notifications for your student's organizations, and access weekly cafeteria menus. Get district updates and easily find staff contact information.
- Event listings with calendar integration
- Customizable notifications by student organization
- Weekly cafeteria menus
- District live feed updates
- Staff and department contact directory
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Introducing the brand new app for John Rex Charter School. NEVER MISS AN EVENT The event section shows a list of events throughout the district. Users can add an event to their calendar to share the event with friends and family with one tap. CUSTOMIZE NOTIFICATIONS Select your student's organization within the app and make sure you never miss a message. CAFETERIA MENUS Within the dining section, you'll find an easy to navigate, weekly menu, sorted by day and meal type. DISTRICT UPDATES In the Live Feed is where you'll find updates from the administration about what's going on in the district right now. Whether that's celebrating a student's success, or reminding you about an upcoming deadline. CONTACT STAFF & DEPARTMENTS Find relevant staff and department contacts under an easy-to-navigate directory.
Screenshots
Verdict
The clearest difference is ratings volume: InstaSub at 259 against John Rex Charter School's 6. InstaSub also leads on device support (3 vs 1) and iOS requirement (12.0 vs 16.0). John Rex Charter School's advantage is rating (4.7 vs 4.5). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
John Rex Charter School holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: InstaSub has 259 ratings behind it against 6, so its average is the more settled of the two.
InstaSub ships an update every 6 weeks, John Rex Charter School every 5 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | InstaSub | John Rex Charter School |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (259 ratings) | 4.7 (6 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 259 — better | 6 |
| Update frequency | Every 6 weeks | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 24 MB | 146 MB |
| Age rating | 4+ | 4+ |
| Developer | Humanity.com, LLC | John Rex Charter School |
Customer experience
InstaSub
John Rex Charter School
In-app purchases
InstaSub
No in-app purchases
John Rex Charter School
No in-app purchases
Questions
Is InstaSub free?
Is John Rex Charter School free?
Which has better reviews, InstaSub or John Rex Charter School?
Do InstaSub or John Rex Charter School have ads?
Which is updated more often, InstaSub or John Rex Charter School?
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