Concise ISL vs VDI
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Concise ISL
Learn Irish Sign Language with a comprehensive video dictionary featuring around 1000 signs. Explore signs by category, search efficiently, and access offline content. Ideal for learners of all ages.
- 1000+ ISL signs in video format
- High-quality image support for signs
- Categorized sign organization
- Efficient search functionality
- Offline use after initial download
- Child-appropriate content
- Information on ISL history and grammar
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Concise ISL is an Irish Sign Language (ISL) video dictionary which contains approximately 1000 signs. This mobile app was developed by two young Irish engineers, one of whom is a life-long practitioner of Irish Sign Language, in response to the need for digital resources to support sign language learning in Ireland. Our aim is to provide a comprehensive ISL dictionary system in an easy-to-use form. --------------- Features --------------- Each sign contained within Concise ISL is presented in video form and accompanied by high quality images of the component signs for each hand. All signs can be sorted by category, an organisational approach chosen to support learning. Specific words and categories can be easily found within Concise ISL, using a simple and efficient search interface, swipe gestures, sliding menus and other intuitive interaction mechanisms. This app is designed to be child-appropriate, with the inclusion of a large number of signs in categories such as Animals, Colours, Food, Sports and many others. Through the inclusion of signs such as "texting", "tablet", "facebook" and many more, this ISL dictionary reflects the modern context of the language. Concise ISL currently includes approximately 1000 signs, a figure which we have continuously strived to increase. Concise ISL supports offline use. A data connection is required to download signs for the first time. These videos are then stored on-device for subsequent viewing offline. This approach allows the inclusion of such a large number of signs without imposing the consumption of a significant amount of on-device memory on all users. The video size has been carefully calculated to reduce bandwidth consumption. Concise ISL also includes a number of additional sections containing information concerning the history of ISL, the grammatical structure of the language and more. We hope you enjoy using Concise ISL! Kevin & MicheΓ‘l
VDI
Prepare for your Irish Theory and Driving Tests with this comprehensive app. It offers extensive practice questions, mock exams, and video lessons covering all essential topics. Designed by driving instructors, it aims to help learners pass faster and with less stress.
- 800+ official style theory questions
- Mock and custom theory tests
- Road signs and examiner questions
- Bonnet check and control lessons
- 40+ video driving lessons
- Updated for latest RSA syllabus
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Pass your Irish Theory & Driving Test with VDI: Irish Theory & Test Prep. The all-in-one learner app for Ireland. Built For learners by real driving instructors and updated for the latest RSA syllabus. Learn Faster Everything you need to pass the Irish Theory Test. β’ Theory Practice: 800+ official style question you must learn for your exam. β’ Mock Tests: Take real Theory test style exams until you are confident. β’ Custom Tests: Choose how many questions and topics you want to study. β’ Affordability: Most affordable theory test on the market. Master The Driving Test Everything you need to prepare for the driving test. β’ Road signs and questions asked by the examiners. β’ Bonnet check, secondary control, and hand signal questions. β’ 40+ video lessons on junctions, roundabouts, 3 test manoeuvres and much more. Why Choose VDI β’ Over 17,000 Learners already used VDI to prepare for their tests. β’ Trusted by over 100,000 learners online. β’ Updated for 2025 SA syllabus. β’ Helps your pass both tests faster, cheaper, and with less stress. Download VDI Irish Theory & Test Prep today and start your journey to a full licence.
Screenshots
Verdict
The clearest difference is price: VDI at Free against Concise ISL's $1.99. VDI also leads on update cadence (every 6 weeks vs every 25 months). Concise ISL's advantage is ads (none vs shown) and iOS requirement (9.0 vs 13.0). On review sentiment, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
VDI is free to download; Concise ISL costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Concise ISL ships an update every 25 months, VDI every 6 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | Concise ISL | VDI |
|---|---|---|
| Price | $1.99 | Free β better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Update frequency | Every 25 months | Every 6 weeks β better |
| Ads | No β better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported β better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 β better | 13.0 |
| Further details β not scored | ||
| Size | 25 MB | 65 MB |
| Age rating | 4+ | 4+ |
| Developer | Kevin Doherty | Ross Smith |
Customer experience
Concise ISL
VDI
In-app purchases
Concise ISL
No in-app purchases
VDI
No in-app purchases
Questions
Is Concise ISL free?
Is VDI free?
Do Concise ISL or VDI have ads?
Which is updated more often, Concise ISL or VDI?
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