Internal Waves vs Pebble
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Internal Waves
Create interactive particle art that responds to touch and music. This mindfulness experience offers a calming way to express yourself with light and motion, perfect for relaxation or creative exploration. Features AR mode for painting in your real-world space.
- Interactive particle art creation
- Music-reactive visuals
- Augmented Reality (AR) mode
- Multi-touch drawing
- Customizable particle effects
- Mindfulness and relaxation focus
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Discover calm, creativity, and connection through interactive particle art. Internal Waves – Particle Flow is a mindfulness experience that lets you draw, play, and express yourself with light and motion. Whether you're relaxing before bed or just need a moment to reset, touch the screen and watch beautiful, fluid particles respond to your fingers — or to your music. Features: Draw with your fingers using flowing, glowing particle trails Visuals that react to music — yours or built-in tracks AR mode (on supported devices) to paint with light in your real-world space Supports up to 10-finger multi-touch drawing Add motion drift, color variation, and more to customize your vibe No goals. No pressure. Just motion, sound, and light — designed to help you breathe, explore, and reset. Great For: Mindfulness and meditation Visual stimulation and relaxation Music lovers and visual artists Late-night winding down Just vibing out when you need a break Tap in and feel the flow. Internal Waves – Particle Flow is more than an app — it's a state of mind. App Store Connect and the Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Pebble
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End the bedtime battle. For real this time. If you're parenting a child with ADHD, autism, or sensory needs - or you live with time blindness yourself - you already know: generic bedtime apps don't get it. Stories without structure don't build habits. Habit trackers without joy don't last. Pebble does both - wrapped in a visual bedtime routine your child actually wants to come back to. HOW A PEBBLE BEDTIME WORKS 1. Gentle reminder - a calm cue at your chosen time. Built for parents with time blindness, so consistency happens even on the days your brain forgets. 2. Personalized visual routine - your child sees exactly what's next, in pictures, in the order that works for them. You can take photos of your own things - toothbrush, pyjamas, favorite teddy - and the app turns them into Pebble-style illustrations. 3. Story reward - finishing the routine unlocks a new bedtime chapter where your child is the hero. Their name is woven into the story, so they step into Pebble's world as themselves. WHY THIS WORKS FOR NEURODIVERGENT FAMILIES Pebble is a pillbug whose sensory feelers help him understand big feelings - built as a metaphor for emotionally sensitive children who feel everything more intensely. Predictability calms anxiety. Visuals reduce executive function load. Becoming the hero of the story makes the routine something your child owns, not something done to them. Together, they turn bedtime from a battle into a sequence the whole family can rely on. WHAT'S INSIDE - Original bedtime story chapters with your child's name woven in - Bedtime routine builder you can fully customize - Photo-to-illustration feature: turn your child's real things into Pebble-style art - Calm, gentle narration - No ads, no overstimulating content, no in-app purchases aimed at kids - Designed by a parent of neurodivergent children A TOOL FOR THE WHOLE FAMILY Pebble is built to be used together. A parent sets the routine, and the child follows along - it's a shared moment, not a screen to hand off. FROM THE FOUNDER I built Pebble because I needed it. My own kids needed structure that didn't feel like a fight, and stories that helped them name what they were feeling. Pebble is the app I wished existed when I was the parent kneeling next to a bed at 10pm wondering what I was doing wrong. You're not doing anything wrong. You just need a system that works the way your family's brains work. FREE TRIAL & SUBSCRIPTION Try Pebble free for 7 days. Subscribe to unlock a new story every day and full access to the routine builder. PRIVACY - No ads, ever - No data sold to third parties - No social features or chat Questions or feedback? dev@pebblekids.app Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://limited-wildebeest.super.site/privacy-policy
Screenshots
Verdict
The clearest difference is ads: Pebble at none against Internal Waves's shown. Internal Waves's advantage is update cadence (every 10 days vs monthly) and iOS requirement (13.0 vs 15.0). On price, in-app purchases and device support 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. Internal Waves sells 2 in-app purchases, starting at $2.99 per month and Pebble sells 2 in-app purchases, starting at $17.99 per month. Whichever you choose, the download price is not the number that matters.
Internal Waves ships an update every 10 days, Pebble monthly. The most recent releases landed on November 5, 2026 and October 28, 2026 respectively.
| Parameter | Internal Waves | Pebble |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 10 days — better | Monthly |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 133 MB | 80 MB |
| Age rating | 4+ | 4+ |
| Developer | Riley McKinnon | RENE HOLST LARSEN |
In-app purchases
Internal Waves
- Particle Flow Premium–Monthly$2.991 Month
- Particle Flow Premium – Yearly3 Days trial$9.991 Year
Pebble
- Pebble Kids (Monthly)$17.991 Month
- Pebble Kids (Annual)7 Days trial$119.991 Year









