# eSOMS Maintenance vs DHC

The clearest difference is device support: eSOMS Maintenance at 3 against DHC's 1. DHC's advantage is iOS requirement (13.0 vs 15.0). 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.

eSOMS Maintenance ships an update every 12 months, DHC every 8 months. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | eSOMS Maintenance | DHC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 8 months** |
| Size | 9 MB | 92 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hitachi Energy USA Inc.](https://appshunter.io/developer/513449048) | [De Havilland Aircraft Company of Canada Limited](https://appshunter.io/developer/1503054078) |

## What reviewers say

### eSOMS Maintenance

[App page](https://appshunter.io/ios/app/esoms-maintenance/id1280283328)

**Features:** macOS Compatibility

**In-app purchases:** none


### DHC

[App page](https://appshunter.io/ios/app/dhc-mobile-maintenance/id1503350127)

**In-app purchases:** none


## Frequently asked questions

### Is eSOMS Maintenance free?

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

### Is DHC free?

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

### Do eSOMS Maintenance or DHC have ads?

Neither eSOMS Maintenance nor DHC shows ads.

### Which is updated more often, eSOMS Maintenance or DHC?

eSOMS Maintenance ships an update every 12 months, and DHC every 8 months. Most recently, eSOMS Maintenance was updated on November 3, 2026 and DHC on October 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*