# ORIONFIELDSERVICE vs ePROMIS

The clearest difference is iOS requirement: ORIONFIELDSERVICE at 11.0 against ePROMIS's 16.0. 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.

ORIONFIELDSERVICE ships an update every 3 months, ePROMIS every 4 months. Both last shipped on October 27, 2026.

## The numbers

| Metric | ORIONFIELDSERVICE | ePROMIS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Size | 28 MB | 65 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Azentio](https://appshunter.io/developer/1604338626) | [ePROMIS Solutions](https://appshunter.io/developer/1570262490) |

## What reviewers say

### ORIONFIELDSERVICE

[App page](https://appshunter.io/ios/app/orionfieldservice/id6459054648)

**Features:** macOS Compatibility

**In-app purchases:** none


### ePROMIS

[App page](https://appshunter.io/ios/app/epromis/id6464270450)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ORIONFIELDSERVICE free?

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

### Is ePROMIS free?

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

### Do ORIONFIELDSERVICE or ePROMIS have ads?

Neither ORIONFIELDSERVICE nor ePROMIS shows ads.

### Which is updated more often, ORIONFIELDSERVICE or ePROMIS?

ORIONFIELDSERVICE ships an update every 3 months, and ePROMIS every 4 months. Most recently, ORIONFIELDSERVICE was updated on October 27, 2026 and ePROMIS on October 27, 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.*