Comparison

SubAlert for Frontline Ed vs InstaSub

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SubAlert for Frontline Ed

Get instant job alerts for substitute teaching positions through notifications, text, or calls. Book jobs with a single click, view job details, and sync your schedule with your device's calendar. Filter alerts to receive only desired job opportunities.

Highlights
  • Instant job alerts via notification, text, or call
  • One-click job booking
  • View job details and teacher notes
  • Sync scheduled jobs to device calendar
  • Customizable job alert filters
  • Multi-district account management
Features
Read full description

Instant job alerts, job booking, & calendar syncing for Frontline Education™ Absence Management (formerly known as Aesop®)! Features include: • Receive job alerts by app notification, text message, phone call, desktop alert, and/or email the minute a job becomes available! • Book jobs with a click! (right from your lock screen if you like!) • View your Available Jobs, Scheduled Jobs, Job Details, & Teacher Notes with a click • Auto-Sync your Scheduled Jobs to your device's Calendar app • Set filters so that you are only alerted about jobs you want • GPS directions to job locations • Reject jobs you don't want • If you work for multiple districts, view all your accounts in one place. Jobs that conflict with your schedule at ANY of your districts are clearly marked, so you never have to worry about over-booking • SubAlert is approved by Frontline Education™ for use with their Absence Management feature. (Frontline Education™ and Frontline Absence & Time™ are trademarks of Frontline Technologies Group, LLC. SubstituteAlert Inc. is not affiliated with Frontline Technologies Group, LLC)

About

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.

Highlights
  • Accept/Decline jobs
  • View job history
  • Post and manage absences
  • Schedule substitute requests
  • Approve/Deny time-off
  • Absence reporting
Features
Read full description

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.

Screenshots

SubAlert for Frontline Ed4 screens
InstaSub4 screens

Verdict

The call

The clearest difference is review sentiment: SubAlert for Frontline Ed at 75% against InstaSub's 0%. SubAlert for Frontline Ed also leads on rating (4.8 vs 4.5) and ratings volume (17K vs 259). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

SubAlert for Frontline Ed holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: SubAlert for Frontline Ed has 17K ratings behind it against 259, so its average is the more settled of the two. Written reviews point the same way: 75% of SubAlert for Frontline Ed's written reviews are positive against 0% of InstaSub's.

UpkeepUpdate frequency

SubAlert for Frontline Ed ships an update every 3 months, InstaSub every 6 weeks. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

Scorecard4 real differences · 6 level
SubAlert for Frontline Ed versus InstaSub: the parameters behind the verdict, then further details
ParameterSubAlert for Frontline EdInstaSub
PriceFreeFree
Rating4.8 (17K ratings) — better4.5 (259 ratings)
Positive reviews75.3% of reviews — better0.0% of reviews
Number of ratings17K — better259
Update frequencyEvery 3 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better12.0
Further details — not scored
Size8 MB24 MB
Age rating4+4+
DeveloperSubstituteAlert.comHumanity.com, LLC

Customer experience

SubAlert for Frontline Ed

All ratings15,038 ratings
Positive96.4%
Neutral1.8%
Negative1.7%
Written reviews243 reviews
Positive75.3%
Neutral6.6%
Negative18.1%

InstaSub

All ratings241 ratings
Positive82.6%
Neutral8.3%
Negative9.1%
Written reviews6 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

SubAlert for Frontline Ed

Reported bugs

2 issues
  • No notifications received for some jobs
  • Unable to book jobs through the app

Requested features

3 requests
  • Add Apple Watch compatibility
  • Improve interface and layout
  • Provide calendar view like Frontline

InstaSub

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

SubAlert for Frontline Ed

No in-app purchases

None

InstaSub

No in-app purchases

Questions

Is SubAlert for Frontline Ed free?
SubAlert for Frontline Ed is free to download, with no in-app purchases.
Is InstaSub free?
InstaSub is free to download, with no in-app purchases.
Which has better reviews, SubAlert for Frontline Ed or InstaSub?
SubAlert for Frontline Ed is rated higher. SubAlert for Frontline Ed averages 4.8 out of 5 from 17K ratings, while InstaSub averages 4.5 from 259 ratings.
Do SubAlert for Frontline Ed or InstaSub have ads?
Neither SubAlert for Frontline Ed nor InstaSub shows ads.
Which is updated more often, SubAlert for Frontline Ed or InstaSub?
SubAlert for Frontline Ed ships an update every 3 months, and InstaSub every 6 weeks. Most recently, SubAlert for Frontline Ed was updated on October 31, 2026 and InstaSub on October 29, 2026.

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