Vocal Range Finder - Sing Whiz

What it does

Sing Whiz is a mobile vocal coach designed to help singers understand and improve their voice. The app's primary function is to accurately measure a user's vocal range by detecting their lowest and highest notes. Based on this data, it identifies their voice type (like Mezzo-soprano or Contralto) and provides a library of exercises focused on areas like pitch accuracy, breathing, and resonance. It's a tool for aspiring singers who want data-driven feedback and structured practice routines.

Where it shines

The app excels at providing immediate, tangible feedback. After a user re-takes the vocal range test, the summary screen at 01:45 doesn't just show the new result, it visually compares it to the previous one. Highlighting that the user's voice is now 'deeper by 57%' is a powerful way to prove value and motivate continued practice. Another strength is its real-time feedback during exercises. At 02:29, as the user sings, the interface shows their pitch accuracy with a trail of stars, making practice feel interactive and rewarding.

UX highlights

Interactive Vocal Test: The core range-finding feature (00:40) provides a simple, interactive way to measure voice. The visual feedback of a dot landing on the musical staff is intuitive.
Shareable Results: Tapping 'Share' (01:12) generates a clean, branded summary card of the user's vocal range. This turns a personal stat into a social asset, encouraging organic marketing.
Clear Exercise Categories: The exercise library is well-organized into logical categories like 'Warmups,' 'Pitch Accuracy,' and 'Breathwork' (02:15), helping users find relevant drills easily.
Visual Breathing Guide: The breathwork exercise at 03:57 uses a simple, expanding and contracting shape to guide the user's breathing, which is more effective than text-only instructions.
In-App Rating Prompt: The app uses a custom rating prompt (01:04) to gauge user satisfaction before potentially showing the official App Store review request.
Progress Visualization: The app shows a clear bar chart comparing the user's new vocal range to their previous one (01:45), making progress easy to see at a glance.

Monetization & growth

The app presents a soft paywall immediately after the initial onboarding (00:24) and again after key actions like re-testing the vocal range (01:56). The paywall uses several common tactics to drive conversion. It offers a significant limited-time discount (40%) and creates urgency with a prominent countdown timer. It also builds trust by featuring a scrolling carousel of positive user testimonials with star ratings. The app offers two subscription plans, yearly and monthly, with the annual option highlighted as a better value. There is no free trial mentioned.

Who it’s for

Sing Whiz is for beginner to intermediate singers, choir members, or anyone curious about their vocal abilities. It's ideal for users who want a structured way to practice without the cost of a personal vocal coach. The focus on fundamental skills like pitch and breathing makes it accessible to those just starting their singing journey. The progress tracking and data-driven feedback would also appeal to users who are motivated by measurable improvement.

Notes & opportunities

The onboarding process requires granting three separate system permissions (microphone, notifications, tracking) in quick succession (00:12 - 00:21), which could feel slightly overwhelming for some users. While gating the first test behind a paywall is a clear strategy, allowing one free test might demonstrate the app's value more effectively and increase conversion rates. The ad displayed on the main dashboard (02:07) feels a bit disruptive to the otherwise clean and focused user experience.