# Open Door Teacher vs CATJEE

The clearest difference is review sentiment: CATJEE at 100% against Open Door Teacher's 25%. CATJEE also leads on update cadence (every 9 days vs every 13 months) and iOS requirement (9.0 vs 15.6). On price, ads, in-app purchases and monetization model 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, CATJEE every 9 days. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Open Door Teacher | CATJEE |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 9 days** |
| Monetization | Free | Free |
| Size | 9 MB | 81 MB |
| Requires iOS | 15.6 | **9.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ThinkFirst Education Private Limited](https://appshunter.io/developer/1400803905) | [CATJEE EDUCATION PRIVATE LIMITED](https://appshunter.io/developer/1562882507) |

## 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


### CATJEE

[App page](https://appshunter.io/ios/app/catjee/id1562882505)

Prepare for competitive engineering and medical entrance exams with this educational app. It offers resources designed to help students ace their JEE and NEET tests.

**Highlights:** JEE exam preparation, NEET exam preparation, Study resources, Exam practice

**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 CATJEE free?

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

### Do Open Door Teacher or CATJEE have ads?

Neither Open Door Teacher nor CATJEE shows ads.

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

Open Door Teacher ships an update every 13 months, and CATJEE every 9 days. Most recently, Open Door Teacher was updated on October 3, 2026 and CATJEE on October 4, 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.*