kiddyGi vs Euler VS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
kiddyGi
This app transforms a phone into a musical instrument for children. Kids can wave the device to create animal sounds or play melodies, with the app continuing tunes if the first few notes are played. It offers an interactive and engaging way for young children to explore music.
- Use phone as a musical instrument
- Wave phone to produce sounds
- Animal sound effects
- Play melodies
- Automatic melody continuation
- Demonstration videos
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Let your kid use the phone as a musical instrument producing sounds when waved in the air like when ringing a bell! A cat meowing, a dog barking, a bird signing, and a piano and a laterna (old barrel music box) playing notes when phone is waved or playing whole melodies by their own in the pauses when not waved. Melodies are also automatically continued if the kid plays, intentionally or unintentionally, the first three notes of a melody. Press the "?" button available on all screens to see a video of a child demonstrating how the app is used. Let the ding-dang-dong begin! Copyright notices: The piano sounds are created by and copyright of Lawrence Fritts at the University of Iowa.
Euler VS
Explore a dynamic world of geometric art and visual synthesis with interactive touch controls. Design and play with harmonic motion and color systems, with options to expand your library through in-app purchases. Sync your creations from macOS for a seamless experience.
- Interactive geometric art
- Harmonic motion exploration
- Touch-driven visual synthesis
- 24 professional presets
- In-app preset packs
- Tap Tempo feature
- iCloud sync with macOS
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Discover a living world of harmonic motion, geometric art, and interactive visual synthesis. Euler VS Player brings the expressive visuals of the macOS app to your iPhone and iPad in a streamlined, touch-driven experience built for exploration, performance, and play. Play Anywhere. Create on macOS. Euler VS Player includes 24 professionally crafted presets, each showcasing unique combinations of periodic functions, harmonic oscillators, geometric transformations, and color systems. Interact with any shape using simple touch gestures to explore animations in real time. Design your own presets using Euler Visual Synthesizer for macOS, organize them into banks, for synchronization with your iOS device through iCloud. Preset Packs and Performance Tools Expand your library with premium professionally designed preset banks available as in-app purchases. For performance and live play, you can tap along to music using the built-in Tap Tempo feature. Tempo-enabled presets will pulse and animate in time with your rhythm. A fully automatic mode is also included, allowing Euler VS Player to cycle through all presets in a bank hands-free. Important Note Euler VS Player is an interactive visual tool. It does not react to external audio input. Tempo-based modulation is controlled manually using Tap Tempo or through automatic playback options.
Screenshots
Verdict
The clearest difference is in-app purchases: kiddyGi at none against Euler VS's 2. kiddyGi also leads on update cadence (every 2 days vs every 8 months) and iOS requirement (11.0 vs 15.2). Euler VS's advantage is ratings volume (5 vs 1). On price, rating, ads 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. Euler VS sells 2 one-off in-app purchases. kiddyGi asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for kiddyGi against 5.0 for Euler VS. That said, the two scores are not equally well evidenced: Euler VS has 5 ratings behind it against 1, so its average is the more settled of the two.
kiddyGi ships an update every 2 days, Euler VS every 8 months. The most recent releases landed on October 2, 2026 and September 23, 2026 respectively.
| Parameter | kiddyGi | Euler VS |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (5 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 5 — better |
| Update frequency | Every 2 days — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple TV — better |
| Requires iOS | 11.0 — better | 15.2 |
| Further details — not scored | ||
| Size | 40 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Stefan Nikolov | AllOneWord Software LLC |
Customer experience
kiddyGi
Euler VS
In-app purchases
kiddyGi
No in-app purchases
Euler VS
- Townsend '94 Bank$0.99
- King St. Garage$0.99









