Visual Vertical vs Sound Surge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
Sound Surge
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Sound Surge (powered by Sound Storm, LiSN & Learn) is an evidence-based auditory training program designed to help children with Spatial Processing Disorder (SPD)—a form of Auditory Processing Disorder (APD) that makes it difficult to understand speech in noisy environments. Children with SPD struggle to filter speech from background noise, making everyday conversations, classroom learning, and social interactions challenging. Sound Surge helps retrain the brain to process and separate sounds effectively, leading to improved listening, attention, and communication skills. How It Works: Through immersive gameplay, Sound Surge strengthens spatial listening abilities by training the brain to detect and focus on speech sounds. The auditory training helps kids to process and separate speech from background noise. This deficit-specific therapy improves speech intelligibility in noisy environments, helping children enhance their ability to follow conversations and engage in social interactions.The program is based on proven clinical research (Cameron & Dillon, 2008) and is designed for daily intervention at home or in therapy settings. Key Features: Clinically designed for children with Spatial Processing Disorder (SPD) 9 interactive galactic worlds with an engaging storyline Built on peer-reviewed research & clinical evidence Progress tracking for parents & professionals Simple, user-friendly interface for independent use Recommended: 5 days per week, 2 sessions per day Why Choose Sound Surge? Boosts Speech Understanding – Helps children filter out background noise and focus on important sounds. Enhances Communication & Confidence – Supports social interactions and classroom learning. Designed for Home & Professional Use – Effective for parents, audiologists, and educators. Take the First Step Toward Better Listening! Help your child unlock clearer, more confident communication with Sound Surge. Download today and start your child’s journey toward improved auditory processing!
Screenshots
Verdict
The clearest difference is price: Sound Surge at Free against Visual Vertical's $11.99. Sound Surge also leads on device support (3 vs 1) and iOS requirement (12.0 vs 16.6). 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
Sound Surge is free to download; Visual Vertical costs $11.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Visual Vertical | Sound Surge |
|---|---|---|
| Price | $11.99 | Free — better |
| Rating | 2.0 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 38 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 191 MB |
| Age rating | 12+ | 4+ |
| Developer | Clear Health Media | Acoustic Pioneer |
In-app purchases
Visual Vertical
No in-app purchases
Sound Surge
No in-app purchases






