EWN Mobile vs RubberSource
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EWN Mobile
Manage compliance and workforce development on the go. Perform performance evaluations offline and sync them automatically when connected. Access digital eCARDS for real-time verification of qualifications and certifications.
- Offline performance evaluations
- Automatic data synchronization
- Digital eCARD access
- Integrated QR scanner
- Real-time qualification verification
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EWN Mobile brings Compliance Management and Workforce Development to your mobile device. Take the E3 system to the field on your phone or tablet with features such as: MOBILE EVALUATOR TOOL Allows performance evaluations to be performed online and for the first time in the industry – OFFLINE. Download performance evaluations to complete later, offline in the field (without connectivity). AUTO SYNCHRONIZATION Upon completion of Performance Evaluations, EWN Mobile will automatically synchronize all completed offline evaluations to the E3 system as soon as a connection is available. DIGITAL eCARD Access all successfully completed qualifications and certifications for real-time verification. INTEGRATED QR SCANNER Scan eCARDs while in the office or in the field with the EWN Mobile integrated QR scanner (or any industry accepted QR scanner) to view/access all successfully completed qualifications. Your system should be as mobile as you are, which is why EWN is committed to being the “First in the Field” to bring you the best in safety, technology, and efficiency. Visit us: http://www.energyworldnet.com Like us on Facebook: http://www.facebook.com/energyworldnetinc Follow us on Twitter: https://twitter.com/ENERGYworldnet Link up with us on LinkedIn: https://www.linkedin.com/company/energy-worldnet-inc.
RubberSource
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RubberSource provides a complete lining system, technical service, material, cement, and repair material. This slide rule contains chemical resistance ratings that have been developed from various sources. The purpose of this data is to help you narrow the choice of materials when selecting the proper liner for your specific needs. For the best recommendations on specifying all your rubber linings, please check with RubberSource’s technical department. Allow a safety margin beyond the most extreme conditions you expect. Wear due to abrasion, impact, and temperature extremes.
Screenshots
Verdict
The clearest difference is iOS requirement: RubberSource at 12.3 against EWN Mobile's 14.0. 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.
EWN Mobile ships an update every 6 weeks, RubberSource every 3 weeks. The most recent releases landed on October 4, 2026 and September 30, 2026 respectively.
| Parameter | EWN Mobile | RubberSource |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (12 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Every 6 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 12.3 — better |
| Further details — not scored | ||
| Size | 37 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | ENERGY worldnet, Inc. | Avanaire Design, LLC |
In-app purchases
EWN Mobile
No in-app purchases
RubberSource
No in-app purchases









