Verticality Test vs SVV
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Verticality Test
Assess verticality, horizontality, and depth perception using your iOS device. This app offers a novel methodology for performing these tests anywhere, under any lighting conditions. A tvOS version is available for classical testing on Apple TV.
- Verticality perception tests
- Horizontality perception tests
- Profundity perception tests
- Novel testing methodology
- iOS device mobility
- tvOS version available
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With Verticality test you can perform easily the verticality perception, horizontality perception and profundity perception tests with all the mobility advantages of your iOS device. We developed a new methodology to allow you to perform the tests at any location with any illumination. For a classical performance of the tests you can use the tvOS version on an AppleTV 4thGen. Verticality and horizontality perception tests are well known medical tests to measure the otolithic function. WARNING: Verticality Test is not a medical device
SVV
This app measures your perception of verticality to assess gravity perception and vestibular function. It uses a simple line adjustment task to calculate deviations from the true vertical, aiding in the detection of vestibular asymmetry.
- Measures subjective visual vertical
- Evaluates gravity perception
- Detects vestibular asymmetry
- Adjusts perceived vertical line
- Calculates mean deviation and standard deviation
- Supports remote and game controllers
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Subjective Visual Vertical (SVV) is a test that measures the difference between a person’s perceived vertical and the true vertical. It evaluates gravity perception mediated by the otolith organs, vestibular nerve, and central vestibular pathways, and helps detect asymmetry of vestibular function. Using an audio/video remote control or a variety of game controllers, including those for Nintendo Switch, PlayStation, and Xbox, the user adjusts a displayed line until it is perceived as perfectly vertical. After repeating this procedure 10 times, the application calculates the mean deviation from the true vertical and the standard deviation.
Screenshots
Verdict
The clearest difference is update cadence: SVV at every 2 months against Verticality Test's every 4 months. Verticality Test's advantage is iOS requirement (11.0 vs 15.0). On price, review sentiment, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Verticality Test ships an update every 4 months, SVV every 2 months. The most recent releases landed on September 14, 2026 and September 7, 2026 respectively.
| Parameter | Verticality Test | SVV |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (2 ratings) — better | — |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | 2 — better | — |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Apple TV — better | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 62 MB | 2 MB |
| Age rating | 17+ | 4+ |
| Developer | Jorge Alberto Rey Martinez | Kuroda ENT Clinic |
Customer experience
Verticality Test
SVV
In-app purchases
Verticality Test
No in-app purchases
SVV
No in-app purchases
