# Open Door Teacher vs Quantum Validation

The clearest difference is update cadence: Quantum Validation at every 5 weeks against Open Door Teacher's every 13 months. Quantum Validation also leads on iOS requirement (13.4 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Open Door Teacher ships an update every 13 months, Quantum Validation every 5 weeks. The most recent releases landed on June 1, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Open Door Teacher | Quantum Validation |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 9 MB | 35 MB |
| Requires iOS | 15.6 | **13.4** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [ThinkFirst Education Private Limited](https://appshunter.io/developer/1400803905) | [Apex Innovations](https://appshunter.io/developer/1669590580) |

## What reviewers say

### Open Door Teacher

[App page](https://appshunter.io/ios/app/open-door-teacher/id1400803906)

This application streamlines the grading of OMR-based forms, providing immediate results. It offers detailed analysis of student misconceptions and generates comprehensive class and individual student reports for easy sharing.

**Highlights:** OMR form evaluation, Misconception analysis, Class reports, Student reports, Result sharing

**Features:** macOS Compatibility

**In-app purchases:** none


### Quantum Validation

[App page](https://appshunter.io/ios/app/quantum-validation/id6717616958)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Open Door Teacher free?

Open Door Teacher is free to download, with no in-app purchases.

### Is Quantum Validation free?

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

### Do Open Door Teacher or Quantum Validation have ads?

Neither Open Door Teacher nor Quantum Validation shows ads.

### Which is updated more often, Open Door Teacher or Quantum Validation?

Open Door Teacher ships an update every 13 months, and Quantum Validation every 5 weeks. Most recently, Open Door Teacher was updated on June 1, 2026 and Quantum Validation on September 17, 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.*