eSOMS Maintenance vs DHC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
eSOMS Maintenance
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The eSOMS Suite Mobile Maintenance application allows maintenance supervisors to sign on and off clearances and maintenance workers to sign on and off work order holders in the field. In the past this had to be done in a work planning office or at a kiosk, which is inefficient. With Mobile Maintenance workers can be briefed before the job in the field and then signed onto the clearance for protection immediately, giving a more accurate accounting of who is being protected by the clearance. When their work is complete they can sign off immediately in the field, eliminating the need to wait in line at a kiosk or office before leaving the worksite.
DHC
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To enroll to use the DHC-Mobile Maintenance app please contact: De Havilland Customer Service by email dehavillandcustomerservice@gilmore.ca or phone 1-800-795-6661. Bringing Paperless¹ Efficiency to Line Maintenance! This application requires a subscription to De Havilland Technical Publications. Using the DeHavilland Mobile Maintenance© application, line and heavy maintenance crews can enjoy the benefits of going paperless¹ by being able to store and access publication data instantly from their iPad© – without WiFi. This solution combines automatic publications and Temporary Revision (TR) updates in one application. De Havilland Mobile Maintenance© enables maintenance facilities to achieve paperless¹ operations simply and efficiently. Accessible Instruction for Continued Airworthiness (ICAs). Up to date. All in one place. Fast and easy, iPad© users simply enter their license code, then ‘sync’ the iPad© app to De Havilland Online Technical Publications. Updated publications are automatically downloaded, indexed and ready to use.in minutes, aircraft maintenance engineers can add text, add signatures to tasks and email them to the fleet maintenance personnel. Automatic revision updates. No more manually inserting revisions and Temporary Revisions (TRs) into De Havilland maintenance manuals. These are automatically inserted into the correct sections and distributed across every iPad© in the operator’s fleet by De Havilland Technical Publications. Valuable time is saved, and maintenance crews are always ready with the latest publications. ¹ Paperless refers to the process identified in the relevant aviation industry requirements pertaining to paperless operations. Use of the De Havilland Mobile Maintenance© application does not relieve operators and their maintenance control or engineering crews of their responsibility to comply with applicable airworthiness authority approved documents.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | eSOMS Maintenance | DHC |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 12 months | Every 8 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 9 MB | 92 MB |
| Age rating | 4+ | 4+ |
| Developer | Hitachi Energy USA Inc. | De Havilland Aircraft Company of Canada Limited |
In-app purchases
eSOMS Maintenance
No in-app purchases
DHC
No in-app purchases
Questions
Is eSOMS Maintenance free?
Is DHC free?
Do eSOMS Maintenance or DHC have ads?
Which is updated more often, eSOMS Maintenance or DHC?
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