# OMR Sheet Scanner vs NL Sensor

The clearest difference is in-app purchases: NL Sensor at none against OMR Sheet Scanner's 2. OMR Sheet Scanner's advantage is update cadence (every 4 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. OMR Sheet Scanner sells 2 in-app purchases, starting at $4.99 per month. NL Sensor asks for nothing beyond the download.

OMR Sheet Scanner ships an update every 4 days, NL Sensor every 2 weeks. The most recent releases landed on September 29, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | OMR Sheet Scanner | NL Sensor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Size | 9 MB | 2 MB |
| Requires iOS | 17 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LUTFULLAH SAFDARI](https://appshunter.io/developer/1884226234) | [Nu Lambda Scientific Company Limited](https://appshunter.io/developer/6792283358) |

## What reviewers say

### OMR Sheet Scanner

[App page](https://appshunter.io/ios/app/omr-sheet-scanner/id6760403475)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OMR Grader Premium | $4.99 | per month |
| OMR Grader Premium | $44.99 | per year |


### NL Sensor

[App page](https://appshunter.io/ios/app/nl-sensor/id6792283356)

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

**In-app purchases:** none


## Frequently asked questions

### Is OMR Sheet Scanner free?

OMR Sheet Scanner is free to download, with in-app purchases available.

### Is NL Sensor free?

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

### Do OMR Sheet Scanner or NL Sensor have ads?

Neither OMR Sheet Scanner nor NL Sensor shows ads.

### Which is updated more often, OMR Sheet Scanner or NL Sensor?

OMR Sheet Scanner ships an update every 4 days, and NL Sensor every 2 weeks. Most recently, OMR Sheet Scanner was updated on September 29, 2026 and NL Sensor on October 9, 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.*