PreNumbers vs DysViewer
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
PreNumbers
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PreNumbers is an application that provides basic pre-numeric skills. PreNumbers for iPad is available in 2 versions: - PreNumbers: Only a limited number of exercises can be used. An In-App Purchase is required to use all exercises. - PreNumbers PRO: All exercises can be used without limitation. Pre-numeric skills include: Sorting things by specific characteristics Dividing things into classes with specific characteristics Recognize and distinguish shapes Quantify and compare quantities Detect seriality (recognize logical sequences and continue) Recognize symmetries and patterns The application offers exercises for different skills in multiple difficulty levels. A simple presentation (forest theme) supports concentration on the essentials. A childlike design was avoided, to make the app appealing also for older children and adolescents. Completed exercises are recorded by the application to document the learning progress. To enable the use of this application with several people, a user manager is offered. Individual settings and results will be saved and can be loaded quickly. The exercises can be operated by alternative input devices such as external switches. Objectives: Train pre-numeric skills Playing Areas of application: Pre-school children Children and adults with learning disabilities
DysViewer
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DysViewer is a document reader for PDF and Word files, designed for dyslexic and low-vision users. Customize fonts, spacing, line and table colors, borders, and reading focus to make text easier to follow. Use word-by-word text-to-speech with language selection, save multiple user profiles, and read offline.
Screenshots
Verdict
The clearest difference is in-app purchases: DysViewer at none against PreNumbers's 1. DysViewer also leads on device support (3 vs 1). PreNumbers's advantage is iOS requirement (12.0 vs 15.0). On price and ads 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
Both are free to download. PreNumbers sells 1 one-off in-app purchase. DysViewer asks for nothing beyond the download.
| Parameter | PreNumbers | DysViewer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 8 months | β |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPad | iPhone, iPad, iPod β better |
| Requires iOS | 12.0 β better | 15.0 |
| Further details β not scored | ||
| Size | 42 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | IntegraTools GmbH | Amicale du Personel de l'institut pour Deficients Visuels |
In-app purchases
PreNumbers
- All exercises$44.99
DysViewer
No in-app purchases









