InstaSub vs Tagg Subs
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.
Tagg Subs
This app connects independent substitute teachers with daily teaching opportunities. Users can select their preferred grades and subjects, and set their availability to find jobs that fit their schedule. It functions as a flexible platform for educators seeking contract work.
- Independent contractor model
- Choose grade and subjects
- Set personal availability
- Receive daily job opportunities
- Flexible work schedule
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Instead of being an employee of the school, you work for yourself. As an independent contractor, you can sub when you want and where you want. It’s like Uber for substitute teaching. In the same way that ride-share drivers use Uber to accept ride requests, you use the Tagg platform to receive daily substitute teaching opportunities that interest you. You can choose what grade and subjects you would like to teach as well as when you are available. Adjust your preferences whenever you want!
Screenshots
Verdict
The clearest difference is rating: InstaSub at 4.4 against Tagg Subs's 3.0. InstaSub also leads on ratings volume (241 vs 2) and update cadence (every 6 weeks vs every 3 months). On price, review sentiment, 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.
InstaSub holds the better App Store score, 4.4 against 3.0. That said, the two scores are not equally well evidenced: InstaSub has 241 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.
InstaSub ships an update every 6 weeks, Tagg Subs every 3 months. The most recent releases landed on September 21, 2026 and August 13, 2026 respectively.
| Parameter | InstaSub | Tagg Subs |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (241 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | 241 — better | 2 |
| Update frequency | Every 6 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 24 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Humanity.com, LLC | Tagg Education, LLC |
Customer experience
InstaSub
Tagg Subs
In-app purchases
InstaSub
No in-app purchases
Tagg Subs
No in-app purchases









