Doodle Spark vs SoundViz
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Doodle Spark
This app offers a simple, engaging drawing experience for toddlers. Children can create colorful rainbow trails, trigger fireworks, and watch their art glow. It's designed with no distractions, making it easy for young children to use independently.
- Rainbow brushstrokes
- Interactive fireworks
- Glowing, fading strokes
- Multi-finger drawing
- Guided Access support
- Distraction-free interface
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Doodle Spark is the perfect drawing app for little ones. With just a touch, toddlers can paint rainbow trails across the screen, tap to burst colorful fireworks, and watch their creations glow and sparkle. Designed from the ground up for young children — no menus, no ads, no distractions. Just a clean black canvas and endless color. Settings for parents stay out of the way behind a faint gear that only opens when it's pressed and held. Built-in Guided Access support lets parents lock the screen to Doodle Spark with a triple-click, so little hands stay safe and the fun never gets interrupted. Features: Rainbow brushstrokes that follow every finger Tap anywhere to burst a colorful firework Smooth glowing strokes that gently fade away Draw with up to 5 fingers at once Works in any orientation — turn the device and the drawing stays put Guided Access ready — lock to the app in seconds No ads, no accounts, no subscriptions, and no internet needed to draw Doodle Spark Plus (optional one-time purchase): Draw & Save mode keeps drawings on screen so you can save them to Photos Pick a single line color or keep the rainbow Choose the line thickness Plus is offered only in the parent settings, and buying it needs a parental check. Can be shared with your family through Family Sharing Doodle Spark is designed to be completely distraction-free. There are no pop-ups, no notifications, and nothing to accidentally navigate away from. Just hand it to your toddler and let their imagination run wild.
SoundViz
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SoundViz transforms the sounds around you into stunning real-time visual art. Whether it's your voice, music, or ambient noise, watch it come alive through 7 unique visualization modes. VISUALIZE YOUR WORLD Use your microphone to capture any sound and instantly see it rendered as beautiful, dynamic visuals. Every whisper, every beat, every note becomes a work of art. 7 VISUAL MODES - Waveform: Classic oscilloscope-style sound waves - Spectrum: Colorful frequency analyzer bars - Circular: Mesmerizing polar coordinate patterns - Particles: Explosive particle effects driven by sound - Kaleidoscope: Symmetrical, ever-changing patterns - Water: Ripple effects emanating from the center - Firework: Sound-reactive firework bursts SENSITIVITY MODES Choose from 4 sensitivity presets to match any environment: - ASMR: Perfect for whispers and subtle sounds - Quiet: Ideal for calm, indoor spaces - Normal: Great for conversation and everyday use - Live: Built for loud music and concerts CUSTOMIZE YOUR EXPERIENCE - 5 built-in color themes: Rainbow, Fire, Ocean, Forest, Neon - Custom color picker to create your own unique palette - Screenshot capture to save your favorite visuals - Clean, distraction-free interface with tap-to-hide controls SoundViz is perfect for music lovers, ASMR enthusiasts, content creators, educators, and anyone who wants to see the beauty hidden in everyday sounds.
Screenshots
Verdict
The clearest difference is in-app purchases: SoundViz at none against Doodle Spark's 1. Doodle Spark's advantage is ads (none vs shown) and update cadence (every 3 days vs monthly). On price, 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. Doodle Spark sells 1 one-off in-app purchase. SoundViz asks for nothing beyond the download.
Doodle Spark ships an update every 3 days, SoundViz monthly. The most recent releases landed on October 31, 2026 and November 9, 2026 respectively.
| Parameter | Doodle Spark | SoundViz |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 3 days — better | Monthly |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 11 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Matt Savage | MIZOU, CO., LTD. |
In-app purchases
Doodle Spark
- Doodle Spark Plus$0.99
SoundViz
No in-app purchases









