# EMS.Inventory vs OGP Observations

The clearest difference is rating: EMS.Inventory at 5.0 against OGP Observations's 2.9. OGP Observations's advantage is ratings volume (13 vs 1) and iOS requirement (9.1 vs 15.6). 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.

EMS.Inventory holds the better App Store score, 5.0 against 2.9. That said, the two scores are not equally well evidenced: OGP Observations has 13 ratings behind it against 1, so its average is the more settled of the two.

EMS.Inventory ships an update monthly, OGP Observations every 2 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | EMS.Inventory | OGP Observations |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/emsinventory/id945959775/reviews)** | [2.9 (13 ratings)](https://appshunter.io/ios/app/ogp-observations/id1201908913/reviews) |
| Number of ratings | 1 | **13** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free | Free |
| Size | 8 MB | 51 MB |
| Requires iOS | 15.6 | **9.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SFS Chemical Safety Inc.](https://appshunter.io/developer/521270523) | [Applications International Corp](https://appshunter.io/developer/994928529) |

## What reviewers say

### EMS.Inventory

[App page](https://appshunter.io/ios/app/emsinventory/id945959775)

This application helps manage chemical inventory from purchase to disposal. It streamlines tracking, purchasing, distribution, sharing, and disposal processes when used with its web counterpart.

**Highlights:** Chemical inventory tracking, Purchase management, Distribution tracking, Disposal management, Integration with web application, Simplified chemical data management

**Features:** Vision Pro support

**In-app purchases:** none


### OGP Observations

[App page](https://appshunter.io/ios/app/ogp-observations/id1201908913)

This app allows users to conduct pre-built behavioral observations and inspections offline or online. It supports various subject matters including health, safety, environmental, and security. Data can be downloaded directly from client databases.

**Highlights:** Online and offline functionality, Pre-built observation templates, Supports various subject matters, Downloadable from client databases, Behavioral, Health & Safety, Environmental, Security observations

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EMS.Inventory free?

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

### Is OGP Observations free?

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

### Which has better reviews, EMS.Inventory or OGP Observations?

EMS.Inventory is rated higher. EMS.Inventory averages 5.0 out of 5 from 1 ratings, while OGP Observations averages 2.9 from 13 ratings.

### Do EMS.Inventory or OGP Observations have ads?

Neither EMS.Inventory nor OGP Observations shows ads.

### Which is updated more often, EMS.Inventory or OGP Observations?

EMS.Inventory ships an update monthly, and OGP Observations every 2 months. Most recently, EMS.Inventory was updated on October 29, 2026 and OGP Observations on October 24, 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.*