# DREX vs Number Therapy

The clearest difference is review sentiment: Number Therapy at 83% against DREX's 0%. Number Therapy also leads on rating (4.7 vs 1.0) and update cadence (every 4 months vs every 33 months). DREX's advantage is price (Free vs $29.99). On ads, in-app purchases and iOS requirement there is nothing between them.

DREX is free to download; Number Therapy costs $29.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Number Therapy holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Number Therapy has 266 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of DREX's written reviews are positive against 83% of Number Therapy's.

DREX ships an update every 33 months, Number Therapy every 4 months. The most recent releases landed on September 30, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | DREX | Number Therapy |
| --- | --- | --- |
| Price | **Free** | $29.99 |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/drex/id985520935/reviews) | **[4.7 (266 ratings)](https://appshunter.io/ios/app/number-therapy/id992597633/reviews)** |
| Number of ratings | 1 | **266** |
| Positive reviews | 0.0% of reviews | **83.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 33 months | **Every 4 months** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#192** |
| Size | 87 MB | 7 MB |
| Requires iOS | 10.0 | **9.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [University of Durham](https://appshunter.io/developer/924002071) | [Tactus Therapy Solutions Ltd.](https://appshunter.io/developer/438070002) |

## What reviewers say

### DREX

[App page](https://appshunter.io/ios/app/drex/id985520935)

This free medical app provides training and assessment to help individuals compensate for partial visual loss. It offers self-adapting reading and exploration exercises that adjust in difficulty as you learn. You can also choose to share your progress data confidentially with healthcare professionals.

**Highlights:** Compensate for partial visual loss, Self-adapting reading training, Exploration training exercises, Regular assessments, Optional data sharing with clinicians, Home-based, unsupervised training

**Features:** macOS Compatibility

**In-app purchases:** none


### Number Therapy

[App page](https://appshunter.io/ios/app/number-therapy/id992597633)

**Currently charting:** #192 Top Paid · Medical (US App Store)

Practice understanding, saying, and typing numbers to improve essential communication skills. This app helps stroke survivors and individuals with cognitive disorders build independence with number-related tasks like dates, money, and phone numbers.

**Highlights:** Practice understanding, saying, and typing numbers, Covers dates, money, phone numbers, and more, Thousands of unique exercises, Customizable interface, Progress tracking and recommendations, Email progress reports for therapists

**In-app purchases:** none


## Frequently asked questions

### Is DREX free?

DREX is free to download, with no in-app purchases.

### Is Number Therapy free?

Number Therapy costs $29.99, with no in-app purchases.

### Which has better reviews, DREX or Number Therapy?

Number Therapy is rated higher. DREX averages 1.0 out of 5 from 1 ratings, while Number Therapy averages 4.7 from 266 ratings.

### Do DREX or Number Therapy have ads?

Neither DREX nor Number Therapy shows ads.

### Which is updated more often, DREX or Number Therapy?

DREX ships an update every 33 months, and Number Therapy every 4 months. Most recently, DREX was updated on September 30, 2026 and Number Therapy on October 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*