Report updated Jun 24, 2026
Collins Dictionary & Thesaurus
For students, language learners, and professionals requiring access to comprehensive, offline-capable dictionary and thesaurus data.
Collins Dictionary & Thesaurus is an established reference app that is a paid app. With a 4.5/5 rating from 92 reviews, it shows polarized user reception.
What is Collins Dictionary & Thesaurus?
Collins Dictionary & Thesaurus is a comprehensive, offline-capable reference app for iOS that bundles unabridged dictionary and thesaurus data.
Users hire this app for reliable, professional-grade linguistic data that functions without internet connectivity, avoiding the ad-supported friction of free alternatives.
Current Momentum
v10.0 · 94mo ago
Zombie- Ships interface themes in latest release.
- Improved home page layout and speed.
What makes this app unique?
What Does It Look Like?
What Are The Key Features?
Look up words in the camera viewfinder and display results in seconds
Displays word predictions as the user types
Finds dictionary entries via voice input for unknown spellings
How much does it cost?
- Single purchase at $39.99
Premium one-time purchase model at $39.99, positioning the app as a professional-grade reference tool.
Who Built It?
MobiSystems
Providing professional-grade productivity and linguistic reference tools for mobile users. Enabling efficient document management and real-time communication on the go.
Portfolio
13
Apps
What other apps does MobiSystems make?
Quick Diagnosis & Treatment
MobiOffice・Word Docs・Excel・PDF
Webster’s College Dictionary
MobiPDF・PDF Text Editor・Reader
Collins Latin Dictionary
Advanced Dictionary&Thesaurus
Explore the full MobiSystems report
Portfolio breakdown, audience, momentum, and every app published by MobiSystems.
What do users think recently?
Analysis in progress, available soon
View the full user-sentiment analysis
Mood gauge, ratings & review-volume history, every praise / complaint / request, and sentiment over time.
What is the competitive landscape for Collins Dictionary & Thesaurus?
How's The Reference Market?
How does it evolve in the Reference market?
The app maintains a 4.54 rating across 92 reviews, signaling a stable niche for professional users despite the lack of recent updates since 2018. Its paid-only model limits mass-market adoption compared to ad-supported competitors.
Rank progression
9 active rankings tracked — 30-day window
Which niche is Collins Dictionary & Thesaurus in?
to look up word definitions and synonyms
Explore the full Language Learning Dictionarys niche
Every app in this space — 250 tracked, the niche's live rankings, and Marlvel's editorial take on the job-to-be-done.
The rivals identified
Nemeses(1)
With over 300,000 reviews and consistent updates, it is the dominant authority in the English language reference space.
Differentiators
- Integrates daily word games and quizzes that drive high daily active user retention metrics
- Provides real-time audio pronunciations and visual illustrations that exceed static text-based dictionary entries
- Maintains a massive, authoritative editorial team that ensures linguistic accuracy and cultural relevance
Head to head
The target app must pivot from a static reference tool to an interactive linguistic platform to compete with the engagement-heavy model of the market leader.
Contenders(3)
The industry leader in AI-driven translation, representing a significant threat to traditional static reference apps.
Differentiators
- Utilizes proprietary neural network technology to provide significantly more natural and accurate translations than competitors
- Maintains an extremely high release frequency, rapidly deploying AI model improvements to the mobile experience
Dominates the contextual translation niche, providing a functional alternative for users needing usage examples.
Differentiators
- Uses a massive database of bilingual documents to provide real-world usage examples for complex phrases
- Focuses on language learning and contextual accuracy rather than just simple dictionary definitions
A massive user base and high release velocity make it a primary alternative for general English reference.
Differentiators
- Features a robust word-of-the-day and trending vocabulary section that keeps content fresh for casual users
- Aggressive release cadence ensures compatibility with the latest iOS features and accessibility standards
Same space(2)
The default destination for general knowledge, acting as a massive indirect competitor for reference queries.
Differentiators
- Provides crowdsourced, real-time updates on biographical and encyclopedic entries that static dictionaries cannot match
- Operates as a non-profit, community-driven platform with zero monetization friction for the end user
A high-rated, specialized alternative for users seeking a comprehensive, offline-capable dictionary experience.
Differentiators
- Prioritizes a lightweight, offline-first architecture that functions without constant internet connectivity requirements
- Offers a clean, distraction-free interface that appeals to users who dislike ad-supported or subscription-heavy models
New entrants(1)
Aggressive expansion in the AI translation space with frequent updates targeting high-utility mobile users.
Differentiators
- Integrates real-time image and voice translation features that turn the phone into a live interpreter
- Optimized for Asian language nuances, capturing a specific market segment that general dictionaries often overlook
Compare Collins Dictionary & Thesaurus against every rival
All rivals in one side-by-side table — identity, store metrics, ratings & sentiment, and strategic intel — plus a head-to-head page for each.
The outtake for Collins Dictionary & Thesaurus
Strengths to defend, gaps to attack
Core Strengths
- Unabridged content library functions as a professional-grade reference barrier
- Offline-first architecture reduces dependency on constant internet connectivity
Critical Frictions
- Premium $39.99 price point exceeds category median for casual users
- No major feature updates since 2018 limits competitive relevance
Growth Levers
- Education partnerships offer untapped B2B distribution channels
- Wearable integration would capture on-the-go professional queries
Market Threats
- DeepL neural network accuracy outpaces static dictionary definitions
- Wikipedia zero-friction model drains general-knowledge query volume
What are the next best moves?
Pivot to a freemium model because the $39.99 barrier limits new-user acquisition → increase install velocity
The current paid-only model is a barrier compared to ad-supported competitors like Dictionary.com.
Trade-off: Pause the development of new interface themes — acquisition growth is more critical than UI polish.
Ship gamified daily quizzes because Merriam-Webster uses them to drive retention → increase DAU
Competitor analysis shows gamified learning is the primary driver for daily engagement in the reference space.
Trade-off: Deprioritize the camera search refinement — engagement loops are a higher priority than tool utility.
A counter-intuitive read
The app's lack of updates is not a failure but a reflection of a finished, high-quality product that serves a specific, non-casual professional segment.
Feature Gaps vs Competitors
- Daily word games and quizzes (available in Merriam-Webster)
- Real-time audio pronunciations (available in Merriam-Webster)
- Neural network translation (available in DeepL)
Key Takeaways
The app provides high-value, unabridged linguistic data, but its static, paid-only model is losing ground to interactive, freemium competitors, so the PM should pivot to a freemium model to capture casual users and drive daily engagement.
Where Is It Heading?
Stable
The reference market is shifting toward interactive, AI-driven, and freemium models that prioritize daily engagement over static data. This app remains stable for its professional user base, but it must modernize its engagement loops to avoid long-term erosion by more dynamic competitors.
The lack of feature updates since 2018 signals a maintenance-mode posture, which risks losing relevance to competitors with aggressive AI-driven release cycles.
The $39.99 price point maintains a professional brand identity but limits the user base to academic power users, narrowing the potential growth ceiling.