# Visual Attention Therapy vs Ratio S/Z

The clearest difference is price: Ratio S/Z at $2.99 against Visual Attention Therapy's $19.99. Ratio S/Z also leads on update cadence (every 3 months vs every 6 months). Visual Attention Therapy's advantage is iOS requirement (9.0 vs 11.0). On ads, in-app purchases, chart position and device support there is nothing between them.

Visual Attention Therapy costs $19.99 and Ratio S/Z $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Visual Attention Therapy ships an update every 6 months, Ratio S/Z every 3 months. The most recent releases landed on October 28, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Visual Attention Therapy | Ratio S/Z |
| --- | --- | --- |
| Price | $19.99 | **$2.99** |
| Rating | **[4.7 (495 ratings)](https://appshunter.io/ios/app/visual-attention-therapy/id539203206/reviews)** | — |
| Number of ratings | **495** | — |
| Positive reviews | 92.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#69** | #199 |
| Size | 10 MB | 25 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Tactus Therapy Solutions Ltd.](https://appshunter.io/developer/438070002) | [Marina Sauca](https://appshunter.io/developer/1207544243) |

## What reviewers say

### Visual Attention Therapy

[App page](https://appshunter.io/ios/app/visual-attention-therapy/id539203206)

**Currently charting:** #69 Top Paid · Medical (US App Store)

This app retrains the brain to scan from left to right, improving reading, concentration, and memory. It features two modes to help individuals with left neglect and professionals assess and treat visual attention deficits.

**Highlights:** Left-to-right scanning training, Visual attention deficit assessment, Target finding exercises, Immediate feedback with cues, Automated scoring and reports, Adjustable difficulty and layouts, Printable exercise options

**In-app purchases:** none


### Ratio S/Z

[App page](https://appshunter.io/ios/app/ratio-sz/id1207544244)

**Currently charting:** #199 Top Paid · Medical (US App Store)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Visual Attention Therapy free?

Visual Attention Therapy costs $19.99, with no in-app purchases.

### Is Ratio S/Z free?

Ratio S/Z costs $2.99, with no in-app purchases.

### Do Visual Attention Therapy or Ratio S/Z have ads?

Neither Visual Attention Therapy nor Ratio S/Z shows ads.

### Which is updated more often, Visual Attention Therapy or Ratio S/Z?

Visual Attention Therapy ships an update every 6 months, and Ratio S/Z every 3 months. Most recently, Visual Attention Therapy was updated on October 28, 2026 and Ratio S/Z on October 8, 2026.

### Which is more popular, Visual Attention Therapy or Ratio S/Z?

Visual Attention Therapy currently peaks at #69 in the App Store charts, and Ratio S/Z at #199. Chart position reflects recent download velocity rather than total install base.

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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.*