ePerf vs DocuNet Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ePerf
This application provides pilots with real-time aircraft performance calculations for any flight phase, offline. It aims to reduce cockpit workload, save fuel through takeoff thrust optimization, and eliminate paper-based materials for a more economical and efficient flight operation.
- Offline flight performance calculations
- Takeoff and landing performance
- Reduced paper cockpit materials
- Engine savings through thrust optimization
- Quick performance calculations
- Support for Embraer Commercial aircraft
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Get performance calculations in any phase of flight, anytime, anywhere! For airlines that seek for an economical paperless cockpit solution the ePerf is a tablet application that reduces costs and workload, and improves the aircraft performance. Our ePerf is fully stand-alone, calculating takeoff and landing performance offline in any phase of flight, anytime and anywhere. Benefits: - Less paper! Reduces or replaces paper-based material, saving weight in the cockpit; - Improved performance compared to printed performance books; - Engines Savings due to Takeoff Thrust Optimization - Saves time: quick performance calculations and lower workload; - Clean interface: straight-forward for pilots; - Analysis run offline: no Internet connection needed; - Support for all Embraer Commercial aircraft models; - Easy to update. Requirements: - Airport database compatible with ECAFM or IATA SCAP ADIS v1.0 (Airport database updates either via iTunes or wirelessly) Data enclosed in the application is provided for demonstration purposes only and shall not be used for operational purposes. Please contact Embraer for further information (opereng@embraer.com.br).
DocuNet Viewer
Access flight operations manuals offline on your iPad. This app provides fast, intelligent searching, bookmarking, and filtering for your entire manual library, ensuring you always have the latest information from all manufacturers.
- Offline manual access
- Tabbed multi-document viewing
- Fast intelligent searching
- Bookmarking
- MSN/audience filtering
- Layered manuals
- Automatic updates
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For airlines using Vistair's acclaimed industry leading Flight Operations Technical Publications service, this is the iPad application that you can deploy to your crew to enable them to access their flight operations manuals offline. *This app requires your airline to have a DocuNet contract with Vistair to function in an operational environment* Functionality includes tabbed, multi-document viewing, fast intelligent searching across your manual library with highlighted results, bookmarking, MSN/audience filtering and Layers for applicable manuals and access to your latest manuals of all manufacturers including Boeing and Airbus from the Vistair technical publications service. Updates are delivered directly to your iPad. Simple to use and navigate, its quick access and elegant design gives you access to your manual library wherever you are. The Vistair DocuNet service includes the full back-end management of content to all devices in your fleet and visibility of update and revision status down to each device with full access control.
Screenshots
Verdict
The clearest difference is rating: ePerf at 3.0 against DocuNet Viewer's 1.0. DocuNet Viewer's advantage is device support (3 vs 1). On price, ratings volume, update cadence and ads 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.
ePerf holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively.
ePerf ships an update every 2 months, DocuNet Viewer every 6 weeks. The most recent releases landed on July 17, 2026 and September 8, 2026 respectively.
| Parameter | ePerf | DocuNet Viewer |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | 1.0 (4 ratings) |
| Positive reviews | — | 7.3% of reviews |
| Number of ratings | 2 | 4 — better |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 53 MB | 166 MB |
| Age rating | 4+ | 17+ |
| Developer | EMBRAER S.A. | Vistair Systems Ltd |
Customer experience
ePerf
DocuNet Viewer
In-app purchases
ePerf
No in-app purchases
DocuNet Viewer
No in-app purchases
Questions
Is ePerf free?
Is DocuNet Viewer free?
Which has better reviews, ePerf or DocuNet Viewer?
Do ePerf or DocuNet Viewer have ads?
Which is updated more often, ePerf or DocuNet Viewer?
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