# InstaSub vs Sub Start

The clearest difference is review sentiment: Sub Start at 100% against InstaSub's 0%. InstaSub's advantage is ratings volume (241 vs 5) and rating (4.4 vs 4.2). On price, update cadence, 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.

InstaSub holds the better App Store score, 4.4 against 4.2. 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 complicate that: 0% of InstaSub's written reviews are positive against 100% of Sub Start's, so the app with the better star average is not the one people write more warmly about.

InstaSub ships an update every 6 weeks, Sub Start every 2 months. The most recent releases landed on September 21, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | InstaSub | Sub Start |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (241 ratings)](https://appshunter.io/ios/app/instasub/id1501485445/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/sub-start/id1571113022/reviews) |
| Number of ratings | **241** | 5 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 24 MB | 86 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Humanity.com, LLC](https://appshunter.io/developer/864258525) | [SubStart](https://appshunter.io/developer/1571113024) |

## 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


### Sub Start

[App page](https://appshunter.io/ios/app/sub-start/id1571113022)

This app streamlines substitute teacher booking and management for childcare programs. It offers features like check-in/out, messaging, document management, and worksite insights. Available in multiple languages, it aims to simplify administrative tasks for educational facilities.

**Highlights:** Substitute teacher booking management, Check-in/out functionality, Messaging and alerts, Document management, Worksite insights, Multi-language support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is InstaSub free?

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

### Is Sub Start free?

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

### Which has better reviews, InstaSub or Sub Start?

InstaSub is rated higher. InstaSub averages 4.4 out of 5 from 241 ratings, while Sub Start averages 4.2 from 5 ratings.

### Do InstaSub or Sub Start have ads?

Neither InstaSub nor Sub Start shows ads.

### Which is updated more often, InstaSub or Sub Start?

InstaSub ships an update every 6 weeks, and Sub Start every 2 months. Most recently, InstaSub was updated on September 21, 2026 and Sub Start on September 13, 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.*