Comparison

cMate vs DjVu Reader & Viewer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

cMate

This app provides essential IMO phrases for seafarers and maritime students. It offers standardized navigational and safety communications in four languages to ensure clear and unambiguous interactions at sea.

Highlights
  • IMO phrases for seafarers
  • Four language support
  • Navigational and safety communications
  • Standardized maritime language
  • Clear and unambiguous communication
Features
Read full description

This application is intended for seafarers and those who study the sea English. cMate-SMCP contains IMO phrases in four languages (English, Russian, Spanish, French) As navigational and safety communications from ship to shore and vice versa, ship to ship , and on board ships must be precise, simple and unambiguous, so as to avoid confusion and error, there is a need to standardize the language used. This is of particular importance in the light of the increasing number of internationally trading vessels with crews speaking many different languages since problems of communication may cause misunderstandings leading to dangers to the vessel, the people on board and the environment.

About

DjVu Reader & Viewer

This app offers a modern and elegant way to read DjVu documents on iOS devices. It features high-quality rendering, a smart document tracking system, and a clean interface optimized for technical and academic material.

Highlights
  • High-quality DjVu rendering
  • Smart document tracking
  • Clean, intuitive interface
  • Dark/White mode options
  • Powerful search capabilities
  • Optimized performance for large documents
Features
Read full description

DjVu Reader is the modern, elegant solution for reading technical and academic DjVu documents on your iOS device. Experience crystal-clear rendering of complex documents with a clean, distraction-free interface designed for professional use. — KEY FEATURES — • High-quality rendering of DjVu documents with precise text and image display • Smart document tracking system to organize your reading (to-read, in-progress, completed) • Clean, intuitive interface optimized for academic and technical material • Dark/White modes options for comfortable reading in any environment • Powerful search capabilities to quickly find content within documents • Optimized performance for large technical documents and academic papers • Seamless document organization with smart folders and favorites (Coming Soon…) Whether you're a researcher, academic, student, or professional, DjVu Reader provides the perfect experience for your technical documents. — SUPPORT & LINKS — - Contact Us: support@djvu.app - Privacy Policy: https://djvu.app/privacy - Terms of Use: https://djvu.app/terms

Screenshots

cMate4 screens
DjVu Reader & Viewer4 screens

Verdict

The call

The clearest difference is review sentiment: cMate at 100% against DjVu Reader & Viewer's 25%. cMate also leads on in-app purchases (none vs 2) and update cadence (every 5 weeks vs every 4 months). DjVu Reader & Viewer's advantage is price (Free vs $2.99). On ads 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

CostPrice · In-app purchases · Ads · Monetization

DjVu Reader & Viewer is free to download; cMate costs $2.99 up front. DjVu Reader & Viewer sells 2 in-app purchases, starting at $2.99 per 7 days. cMate asks for nothing beyond the download.

UpkeepUpdate frequency

cMate ships an update every 5 weeks, DjVu Reader & Viewer every 4 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard6 real differences · 4 level
cMate versus DjVu Reader & Viewer: the parameters behind the verdict, then further details
ParametercMateDjVu Reader & Viewer
Price$2.99Free — better
Rating—4.2 (75 ratings) — better
Positive reviews100.0% of reviews — better25.0% of reviews
Number of ratings—75 — better
Update frequencyEvery 5 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS10.0 — better16.2
Further details — not scored
Size8 MB35 MB
Age rating+44+
DeveloperMaxim LukyanenkoYassir Hrout

Customer experience

cMate

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

DjVu Reader & Viewer

All ratings65 ratings
Positive81.5%
Neutral0.0%
Negative18.5%
Written reviews12 reviews
Positive25.0%
Neutral25.0%
Negative50.0%

In-app purchases

None

cMate

No in-app purchases

2 purchases

DjVu Reader & Viewer

Subscriptions1
  • Weekly Plan$2.997 Days
One-time1
  • Lifetime Plan$5.99

Questions

Is cMate free?
cMate costs $2.99, with no in-app purchases.
Is DjVu Reader & Viewer free?
DjVu Reader & Viewer is free to download, with in-app purchases available.
Do cMate or DjVu Reader & Viewer have ads?
Neither cMate nor DjVu Reader & Viewer shows ads.
Which is updated more often, cMate or DjVu Reader & Viewer?
cMate ships an update every 5 weeks, and DjVu Reader & Viewer every 4 months. Most recently, cMate was updated on November 3, 2026 and DjVu Reader & Viewer on October 30, 2026.

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