Audition Vocal Toolbox vs Siren's Spellbook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Audition Vocal Toolbox
This app offers vocal warm-ups, singing guidance, and music theory for singers of all levels. It includes targeted exercises, audition tips, and tools for understanding scales and keys, created by experienced vocal professionals.
- Categorized vocal warm-ups
- Vocal range options
- Pitch slider for warm-ups
- Customizable playlists
- Key Centre feature for ear training
- Audition tips & tricks
- Foundational music theory
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Audition Vocal Toolbox (AVT) is your number one go-to vocal warm up and singing app with a difference. Created by Singers, for Singers. No matter what kind of singer, musician or voice user you are, AVT will benefit you! AVT is a vocal warm up companion app for singers (of all levels), performers and teachers. It is perfect for use in vocal warm ups and performance practice, audition and recording preparation as well as during online and in-person voice lessons. The app includes foundational vocal education, singing guidance, a list of highly targeted vocal warm ups and exercises, audition and music theory instruction, and a tool to assist with scale and key understanding. AUDITION VOCAL TOOLBOX will help you maximise the potential of your vocal warm up and understanding of foundational vocal technique. AVT includes all the following: - Comprehensive set of categorised vocal warm ups based on voice pedagogy - 6 Vocal Range options + 1 especially designed for voice teachers and working professionals - Unique slider feature to assist with pitch during warm ups - Pre-made and customisable playlists of your favourite warm ups and exercises - Choice of vocal ranges and a midrange selection (for those who want a gentler start) - "10-minute Combo", “Gentle Warm Up”, “Midrange” options for a pre-planned warmup - "Key Centre" feature to help with key understanding and ear training - Vocal health tips - Audition tips & tricks - Foundational music theory - Notes feature to take note of practice times and your favourite songs - And MUCH MORE! Including ongoing updates with new content! Each warm up and exercise in AVT has been curated to help target specific areas of your vocal technique to help encourage healthy vocal warm up habits. The vocal warm ups and exercises are entirely devised, tested and recorded by the AVT team, with the regular feedback of a team of Australian and International vocal and music professionals. AVT does not record any audio when using the app. Our aim at AVT is to help you to enjoy the vocal warm up process. Dana Musil and Kym Mc, the creators and directors of Audition Vocal Toolbox, are both highly qualified music teachers and accomplished performers with national and international experience for over 15 years combined. TESTIMONIALS “AVT has been useful in not only my own professional work but with my students as well. For myself I have been able to use this on board the cruise ship as a way of warming up before I perform with my band. I don’t have access to a piano in my cabin so this has been a great tool to use just before going on stage. For my students, they are able to take this home and use it in their own practice…I’ve learnt a lot myself from using AVT” Kelly M – International Vocalist and Voice Teacher “AVT is a fantastic resource! It assists with teaching and helps me prescribe exercises for students to practice during the week. AVT encompasses technical exercises, aural components, tempo adjustment and voice support which is helpful for vocal development.” Elissa F - Speech Pathologist and Voice Teacher “Audition Vocal Toolbox is something that can be used in the studio or out. It has Bluetooth capabilities which can assist in rehearsals and warm ups for gigs. The unique features of Key Centre and voice support are fantastic additions!” Zak S – Performer and Musician Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Siren's Spellbook
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Siren’s Spellbook is the singers' companion for learning scales, modes, solfège, audiation, and the moods and characters of the Classical Modes, using the timeless Kodály inspired approach. The app helps singers study not only how of the Classical Modes sounds, but also how each parent scale and rotation feels, functions, and is traditionally named. Inside the free companion app for iPhone and iPad you can: • Hear scale demonstrations and technical studies of every scale with accurate tempo-based playback. • Learn to recognise and use the archetypal mood and character of the parent-scales and modes and use them in your singing and composition. • Learn the construction of character and mood archetypes, showing how interval tendencies combine into more complex modal identities. • Practice with a built-in metronome synced to the selected BPM. • Explore parent scales and modal rotations across pentatonic, diatonic, harmonic, melodic, neapolitan, double harmonic, Hungarian minor, whole-tone, augmented hexatonic, diminished octatonic, and chromatic families. • Access reference pages for Western modes and Carnatic/Karnataka pitch-set equivalents. • Sing the scales using the movable-Do solfège with chromatic alterations, octave markers, and a parent-relative rotational logic inspired by Kodály pedagogy. • Learn to use the Curwen hand signs to assist with visually and kinaesthetically anchoring the intervals with the solfège. The app is designed differently for each device: • On iPad, the complete Siren's Spellbook sheet music for all scales and modes is included with full workbook page viewing and inline playback controls as an IN-APP FULL SHEET MUSIC PURCHASE. • On iPhone, it works as a practical singing companion to the physical version of Siren's spellbook, which is available to purchase separately. The companion app has fast playback buttons for the exercises, making it easy to use alongside the physical book. The iPhone app does not include the sheet music, even with the full sheet music purchase. It is audio only. Siren’s Spellbook is especially useful for: • singers studying solfege and audiation • students learning modal colour and function • teachers working with Kodaly-inspired training • anyone wanting a deeper, more expressive understanding of scales and modes If you want to move beyond memorising note patterns and start hearing the inner character of each modal family, Siren’s Spellbook offers a structured and musical path into modal practice.
Screenshots
Verdict
The clearest difference is ads: Siren's Spellbook at none against Audition Vocal Toolbox's shown. Siren's Spellbook also leads on update cadence (every 2 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement 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. Audition Vocal Toolbox sells 2 in-app purchases, starting at $3.99 per month and Siren's Spellbook sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Audition Vocal Toolbox ships an update every 2 months, Siren's Spellbook every 2 weeks. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.
| Parameter | Audition Vocal Toolbox | Siren's Spellbook |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 756 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | K.M MCNAUGHTON & D MUSIL | Jordan Collin |
In-app purchases
Audition Vocal Toolbox
- Premium1 Month trial$3.991 Month
- Premium$39.991 Year
Siren's Spellbook
- Siren’s Spellbook iPad Sheet Music$14.99
Questions
Is Audition Vocal Toolbox free?
Is Siren's Spellbook free?
Do Audition Vocal Toolbox or Siren's Spellbook have ads?
Which is updated more often, Audition Vocal Toolbox or Siren's Spellbook?
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