# InstaSub vs ClassicalU Mobile

InstaSub and ClassicalU Mobile both sit at 4.4 stars, but that hides the real split: 50% of ClassicalU Mobile's written reviews are positive against 0% of InstaSub's. ClassicalU Mobile also leads on update cadence (every 6 days vs every 6 weeks). InstaSub's advantage is ratings volume (241 vs 5) and iOS requirement (12.0 vs 15.1). On price, rating, ads and in-app purchases there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.4 for InstaSub against 4.4 for ClassicalU Mobile. That said, the two scores are not equally well evidenced: InstaSub has 241 ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 0% of InstaSub's written reviews are positive against 50% of ClassicalU Mobile's.

InstaSub ships an update every 6 weeks, ClassicalU Mobile every 6 days. The most recent releases landed on October 16, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | InstaSub | ClassicalU Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (241 ratings)](https://appshunter.io/ios/app/instasub/id1501485445/reviews) | [4.4 (5 ratings)](https://appshunter.io/ios/app/classicalu-mobile/id6776681087/reviews) |
| Number of ratings | **241** | 5 |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 6 days** |
| Monetization | Free | Free |
| Size | 24 MB | 32 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Humanity.com, LLC](https://appshunter.io/developer/864258525) | [CLASSICAL ACADEMIC PRESS, LLC](https://appshunter.io/developer/6776681089) |

## What reviewers say

### InstaSub

[App page](https://appshunter.io/ios/app/instasub/id1501485445)

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:** Vision Pro support

**In-app purchases:** none


### ClassicalU Mobile

[App page](https://appshunter.io/ios/app/classicalu-mobile/id6776681087)

Access your enrolled courses, discover new ones, and watch video lectures on the go. Download lessons for offline viewing and track your progress towards certificates. This app complements the classicalu.com learning platform.

**Highlights:** Access enrolled courses, Discover and browse courses, Watch video lectures, Offline lesson downloads, Track progress and earn credit, View and download certificates

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is InstaSub free?

InstaSub is free to download, with no in-app purchases.

### Is ClassicalU Mobile free?

ClassicalU Mobile is free to download, with no in-app purchases.

### Which has better reviews, InstaSub or ClassicalU Mobile?

InstaSub and ClassicalU Mobile are both rated 4.4 out of 5 on the App Store, from 241 and 5 ratings respectively.

### Do InstaSub or ClassicalU Mobile have ads?

Neither InstaSub nor ClassicalU Mobile shows ads.

### Which is updated more often, InstaSub or ClassicalU Mobile?

InstaSub ships an update every 6 weeks, and ClassicalU Mobile every 6 days. Most recently, InstaSub was updated on October 16, 2026 and ClassicalU Mobile on October 18, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*