Comparison

Visual Vertical vs Feather squadron 2

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

Head to head
About

Visual Vertical

This medical app offers a quick, accurate, and low-cost method for measuring subjective visual vertical. It's designed for neurologists and vestibular rehabilitation specialists to test patients, especially for brainstem lesions and otolithic function, using just an iPhone or iPad.

Highlights
  • Measure subjective visual vertical
  • Accurate and low-cost testing
  • Suitable for neurology and vestibular rehab
  • Tests for brainstem lesions
  • Evaluates otolithic function
  • Multiple readings and averaged results
  • Single, one-off readings
Features
Read full description

Visual Vertical makes high-grade subjective visual vertical (SVV) testing accessible to every practitioner — no expensive equipment required. SVV testing is a sensitive, validated measure for brainstem lesions and otolithic dysfunction, widely used in neurology and vestibular rehabilitation. Until now, accurate testing required bulky, costly apparatus. Visual Vertical changes that: all you need is your iPhone, a bucket, and a small piece of Blu Tack. How it works Mount your iPhone inside the bottom of a bucket using Blu Tack. The patient holds the bucket to their face and adjusts a line on screen until it appears vertical to them. The app records the deviation and calculates your result — accurate readings in minutes, at a fraction of the traditional cost. What you can measure - Left eye, right eye, or both eyes open - Single readings or full sequences across all conditions - One or three readings per condition, with automatic averaging Clean, minimal results screens make it easy to record and communicate findings.

About

Feather squadron 2

Features
Read full description

This app contains a variety of fun games for children to play (ages 5 and up) and we measure their listening abilities while they play! This app has a quick screening option for parents and teachers, and a comprehensive testing option for appropriate professionals only. This version has been localised for US English. Please see other versions for other countries/accents. For Teachers and Parents: If you think that your child has listening, language or learning problems that might be related to auditory processing, you can use our quick screening to find out if there are any concerns. If you are concerned, regardless of the screening results, we recommend you visit your local audiologist or speech-language pathologist and recommend this app to get your child's auditory processing abilities tested thoroughly as well as traditional hearing testing performed. This app contains a variety of fun games for children to play (ages 5 and up) and we measure their listening abilities while they play! Your specialist can then recommend the appropriate action including treatments and strengthening exercises based on these results. For the professional: Researchers for years have shown the importance of auditory processing abilities and their correlations to language, reading, and educational abilities. Professionals (audiologists, speech-language pathologists, educational psychologists, paediatricians, etc) have not been able to measure auditory processing abilities routinely. There are a variety of reasons given for this; time-constraints, cost-constraints, limited knowledge on how to administer, limited knowledge on how to interpret the findings. Now, the team at Acoustic Pioneer have created a fast, fun, and easy way to measure multiple areas of auditory processing using an iPad app! The assessment app has been developed and normed on over 1000 children. The results are analysed immediately and you will receive a report on the results for your client comparing their ability to that of same-aged peers and will come with recommendations including therapy options, suggestions for teachers, compensatory strategy suggestions, or other information that would be helpful.

Screenshots

Visual Vertical4 screens
Feather squadron 24 screens

Verdict

The call

The clearest difference is price: Feather squadron 2 at Free against Visual Vertical's $11.99. Feather squadron 2 also leads on update cadence (every 4 days vs every 38 months) and device support (3 vs 1). On ads and in-app purchases 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

Feather squadron 2 is free to download; Visual Vertical costs $11.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Visual Vertical ships an update every 38 months, Feather squadron 2 every 4 days. The most recent releases landed on September 24, 2026 and September 16, 2026 respectively.

Scorecard4 real differences · 6 level
Visual Vertical versus Feather squadron 2: the parameters behind the verdict, then further details
ParameterVisual VerticalFeather squadron 2
Price$11.99Free — better
Rating2.0 (5 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 38 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.614.0 — better
Further details — not scored
Size10 MB26 MB
Age rating12+4+
DeveloperClear Health MediaAcoustic Pioneer

In-app purchases

None

Visual Vertical

No in-app purchases

None

Feather squadron 2

No in-app purchases

Questions

Is Visual Vertical free?
Visual Vertical costs $11.99, with no in-app purchases.
Is Feather squadron 2 free?
Feather squadron 2 is free to download, with no in-app purchases.
Do Visual Vertical or Feather squadron 2 have ads?
Neither Visual Vertical nor Feather squadron 2 shows ads.
Which is updated more often, Visual Vertical or Feather squadron 2?
Visual Vertical ships an update every 38 months, and Feather squadron 2 every 4 days. Most recently, Visual Vertical was updated on September 24, 2026 and Feather squadron 2 on September 16, 2026.

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