Comparison

Visual Attention Therapy vs Ratio S/Z

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Visual Attention Therapy

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
Currently charting
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RETRAIN THE BRAIN to move the eyes correctly by scanning from left to right across the screen. Strengthening this essential skill can improve reading, concentration, memory, attention to detail, and speed of processing. TWO POWERFUL MODES help brain injury and stroke survivors with left neglect improve at home while also helping occupational therapy (OT) and speech therapy (SLP) professionals to efficiently assess for right or left neglect and provide more effective treatment. * Use the Test mode to determine if and where a visual attention deficit exists. * Use the Practice mode to train scanning by finding targets in order. ++ SEE HOW IT CAN HELP – Download Visual Attention Therapy Lite for FREE! ++ ----------- CANCELLATION TASKS JUST GOT BETTER. This professional cognitive training app takes a familiar format for treating left neglect and transforms it into a dynamic, interactive tool for all ages. Visual Attention Therapy offers benefits that can only be achieved through technology: * Targets must be tapped from left to right, top to bottom in Practice mode, which trains users to slow down and scan the entire screen before they move on. * Immediate feedback with visual and auditory cues keeps users engaged. * Timed exercises increase motivation to work quickly and accurately. * Stop wasting time counting errors! Automated scoring includes data for accuracy by quadrant, time for completion, and mistakes in professional e-mailed reports. * Adjustable layouts and 10 levels of difficulty allow you to customize the experience to meet changing needs or multiple users. * Sidebar signal can flash in a variety of colors to draw attention to the left or right. * An endless variety of combinations eliminates the need to photocopy exercises, with the option to print screenshots when you need a traditional exercise. * Use only one target to focus on scanning, or use two targets at once to challenge users with working memory and alternating attention deficits. ----------- RACE AGAINST THE CLOCK to improve scores while improving cognitive and reading skills. Levels featuring letters can support literacy goals, while symbol-based levels challenge visual memory skills. It’s an occupational therapy dream come true! Visual Attention Therapy was developed by a certified Speech-Language Pathologist (SLP) and is used worldwide in speech and occupational therapy (OT) to help adults with left neglect after stroke and brain injury. It is also used with children with dyslexia and attentional deficits by reading specialists and neuropsychologists. DON’T JUST TELL YOUR PATIENTS TO LOOK TO THE LEFT – TRAIN THEM. Modernize your occupational therapy or speech therapy exercises with a left neglect training tool that improves stroke and brain injury rehab. DOWNLOAD IT NOW! ----------- Looking for something different in a stroke therapy app? Tactus Therapy offers a wide range to choose from. Find the right one for you at https://tactustherapy.com/find

About

Ratio S/Z

Features
Currently charting
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Ratio S/Z is an app designed by Andreu Sauca, an experienced speech therapist and phoniatrician. It has been conceived as a tool for the evaluation and the monitoring of voice rehabilitation. Purpose: The app registers the maximum expiration and phonation time and the calculation of the phonation quotient (or ratio S/Z) by using the highest of the three values in each. The ratio S/Z test is a crucial part in every protocol of voice exploration. There might be different professional purposes for taking the test. In addition to the exploration purpose, the ratio S/Z can be used as a re-evaluation in case of being monitoring or before being discharged. In some cases, it can also be prescribed as a training for different objectives (this app can be used both by the speech therapist and by the patient) or as a screening tool to detect voice problems among some collectives such as teachers. Procedure: With the aid of the chronometers integrated in the ratio S/Z, the professional registers three samples of the highest time taken in the production of the [s] and other three samples on the highest time production of the [z]. Each chronometer shows the obtained values and highlights the highest one in blue. Automatically, the app uses these values to calculate the S/Z quotient, which appears in green or in red to indicate whether it is pathological or not. The interpretation of results varies according to some parameters (age and gender) is accessible through a specific button. As the age and sex of the patient can vary the interpretation of the results, a button allows the selection of which kind of patient is undergoing the test. This will give us not only a more accurate result, but it will also evaluate the phonation time length, this is a novelty of this app. Characteristics: -Careful design to enable an easy access and a right understanding of the results. -Two chronometers with three partial storing boxes each individually resettable. -Selection of the type of patient according to age and gender. -Resounding examples of the requested sound. -Color code to identify the result fields and buttons. -Start, stop and reset buttons for each chronometer. -Informative window about the test. -Help window to ease the interpretation of results, adapted to it. -Export your results to pdf. -Languages: Spanish, Catalan, Italian and English. More soon.

Screenshots

Visual Attention Therapy4 screens
Ratio S/Z4 screens

Verdict

The call

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 chart position (#50 vs #199) and iOS requirement (9.0 vs 11.0). On ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

Visual Attention Therapy ships an update every 6 months, Ratio S/Z every 3 months. The most recent releases landed on October 27, 2026 and October 8, 2026 respectively.

Scorecard4 real differences · 7 level
Visual Attention Therapy versus Ratio S/Z: the parameters behind the verdict, then further details
ParameterVisual Attention TherapyRatio S/Z
Price$19.99$2.99 — better
Rating4.7 (495 ratings) — better—
Positive reviews92.3% of reviews—
Number of ratings495 — better—
Update frequencyEvery 6 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchases—
Best chart rank#50 — better#199
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS9.0 — better11.0
Further details — not scored
Size10 MB25 MB
Age rating4+12+
DeveloperTactus Therapy Solutions Ltd.Marina Sauca

In-app purchases

None

Visual Attention Therapy

No in-app purchases

None

Ratio S/Z

No in-app purchases

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 27, 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 #50 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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