Doc Reader I vs WABCO OptiLink™
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Doc Reader I
This app allows you to manage and read various document types directly on your iPhone, iPad, or iPod Touch. It supports downloading files from email and the web, editing, and emailing them as attachments. You can also print documents and transfer files to your desktop via iTunes.
- Download files from email and web
- Read PDF, Word, Excel, PowerPoint, iWork, Open Office, RTF, HTML, TXT, and image files
- Delete and email files
- Print documents
- Transfer files via iTunes
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DocReader is a document manager and reader for iPhone, iPod Touch, and iPad. It is a universal app which you can use it on iPhone, iPod Touch, and iPad. Feature: 1. Download files from email 2. Download documents from Internet/Web 3. Delete files in the app 4. Read PDF, MS Word, Excel, PowerPoint, iWork documents(Pages, Keynotes, Numbers), Open Office documents(ODT, ODS, ODP). 5. Email files as attachment 6. Support rotation 7. Open images(JPG, GIF, PNG, BMP, TIFF) 8. Read RTF, HTML, TXT files 9. Print documents from iPhone/iPod Touch/iPad 10. Transfer file between DocReader and desktop using iTunes file sharing
WABCO OptiLink™
This app provides wireless control and monitoring of trailer functions for truck drivers and fleet operators. It offers real-time data on axle load, tire pressure, and vehicle inclination, enhancing safety and operational efficiency.
- Wireless trailer function control
- Real-time condition monitoring
- Axle load and tire pressure monitoring
- Vehicle inclination alerts
- Brake pad and tire temperature monitoring
- Trailer suspension control
- Immobilizer function
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OptiLink™ is a mobile app that allows complete control of your trailer in combination with an OptiLink™ ECU (446 290 700 0), and makes your fleet more effective. Featuring a smart, modern design, OptiLink allows truck drivers and fleet operators to monitor and control available trailer functions wirelessly from an smartphone. It provides easy access to 19 separate trailer functions, controlling suspension, axles, braking and security functions. OptiLink is available in 17 languages. It provides real-time condition monitoring for drivers and fleet operators, delivering fast and easy access to a range of critical trailer data via a simple-to-use graphical interface. It helps to improve safety by allowing a trailer to be controlled from the cab or at a safe distance from the unit, and through a range of automatic alarms tasked to monitor safety-critical parameters and activities. Some of the functions are: Show Me Your Trailer - A simple tool designed to present trailer information at-a-glance. This includes trailer ID number, serial number, type and manufacturer. Axle Load - The OptiLink app presents axle load information, measured in tones and separated into total load across all axles and load on each individual axle. The function also provides an automatic warning when the axle load exceeds pre-programmed limits. Vehicle Inclination - Indicates the angle of inclination for the trailer, with an automatic warning if a defined threshold is exceeded. This is particularly useful for tipping trailers, verifying the trailer is horizontally-positioned before the load is emptied. BVA - A brake pad monitoring function for disc brakes displays the condition of brake pads and warns when worn pads require replacement. Tire pressure - Using the App, drivers and maintenance staff can monitor tire pressure and tire temperature. The battery status of the sensors is also observable and the system will warn users if any parameter moves outside of defined target ranges. OptiLevel™ - Using OptiLink, drivers and depot staff can control trailer electronic air suspension functions. From a smartphone, the user can: lift and lower the trailer chassis; select from a range of loading functions and select driving levels. Axle Control - Using OptiLink, drivers can control the function of lift (tag) axles, while the dynamic wheelbase functions OptiLoad™ and OptiTurn™ as well as Traction Help can be activated and deactivated. The app can also lock or unlock the steering axle. Finisher Brake - A Finisher Brake function for tipper trailers allows the driver to set the brake pressure in case of declining road conditions. Immobilizer - An Immobilizer function enables the locking and unlocking of the trailer brakes with a PIN, preventing a trailer from rolling or being stolen. TailGUARD™ - This blind spot monitoring system activates automatically when reverse gear is selected. OptiLink automatically shows the distances to objects behind the trailer and provides an audible warning with increasing signal frequency as distance shortens. OptiLink can also use the smartphone’s vibration function to provide a haptic warning.
Screenshots
Verdict
The clearest difference is price: WABCO OptiLink™ at Free against Doc Reader I's $2.99. WABCO OptiLink™ also leads on review sentiment (33% vs 7%) and iOS requirement (8.0 vs 15.6). Doc Reader I's advantage is update cadence (every 2 months vs every 47 months). On ads, in-app purchases and device support 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
WABCO OptiLink™ is free to download; Doc Reader I costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Doc Reader I ships an update every 2 months, WABCO OptiLink™ every 47 months. The most recent releases landed on October 5, 2026 and October 4, 2026 respectively.
| Parameter | Doc Reader I | WABCO OptiLink™ |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 7.4% of reviews | 33.3% of reviews — better |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months — better | Every 47 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 8.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 130 MB |
| Age rating | 4+ | 4+ |
| Developer | UMateY | ZF Friedrichshafen AG |
Customer experience
Doc Reader I
WABCO OptiLink™
In-app purchases
Doc Reader I
No in-app purchases
WABCO OptiLink™
No in-app purchases









