Action & Sound vs RobotVRM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Action & Sound
Transform your iPhone into a fun sound effect generator. Move your device in specific ways to trigger a variety of sounds, from sports actions to everyday noises. It's a playful gadget perfect for parties or breaking the ice.
- Motion-activated sound effects
- Over 70 sound effects
- 13 sound categories
- Interactive play
- Party and game friendly
- Regular updates planned
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Turn your iPhone into a playful gadget! Choose a sound effect from the list, then pretend your iPhone is that item and move it around. For example... Swing your iPhone sideways like a baseball bat... “Crack!” — the sound of a home run! Tilt your iPhone like a glass... “Glug glug... gulp!” — pouring sounds. Move your iPhone up and down quickly like a kitchen knife... “Chop chop chop!” — the sound of slicing vegetables. Wave your iPhone around like a lightsaber... “Vwoom... clash!” — just like in a sci-fi movie. Aim your iPhone like a gun... “Click... bang!” — realistic shooting sounds. If your motion matches the expected action, your chosen sound effect will play! Over 70 sound effects across 13 categories! - Sports - Cooking - Battle (swords, guns, lightsabers, etc.) - Everyday life sounds - Tool sounds - Gun loading & firing …and many more! Perfect for parties, drinking games, icebreakers, or simply spicing up your break time. Get ready to bring the fun anywhere! More sounds coming soon! We’re planning to add even more effects and items in future updates. If you have requests, let us know!
RobotVRM
Transform your phone into an AI-powered virtual robot using VRM characters. Enhance the experience with optional hardware for autonomous movement and AI-driven actions. New characters and movements are frequently added.
- Smartphone to AI robot transformation
- VRM character integration
- Optional autonomous movement hardware
- AI-driven character actions
- Customizable characters and backgrounds
- Regular updates with new content
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This app transforms your smartphone into an AI robot with VRM characters. Purchase the "RobotVRM Car" hardware to make VRM characters move autonomously based on AI decisions. RobotVRM Car https://shop.robotvrm.com/products/robotvrm-car Multiple movements are available for you to choose from. New movements and characters are regularly released and updated according to the latest AI developments! You can also customize characters and backgrounds! ****** IMPORTANT ****** This app requires separate OpenAI or Anthropic API keys. * Long-term usage may incur high API costs. Please refer to the RobotVRM list overview in the app for cost estimates. ****** IMPORTANT ****** RobotVRM founder saten's X account https://x.com/saten_work This app is based on Nike-chan's aituber-kit (MIT License era, before 2024/9/25), which was built upon pixiv's open-source ChatVRM. Nike-chan's X account https://x.com/tegnike aituber-kit (MIT License era, before 2024/9/25) https://github.com/tegnike/aituber-kit/tree/5c1be3dae7e38871839f37857e550b8f7387f718 ChatVRM https://github.com/pixiv/ChatVRM
Screenshots
Verdict
The clearest difference is price: RobotVRM at Free against Action & Sound's $0.99. RobotVRM also leads on update cadence (every 4 days vs every 6 months). Action & Sound's advantage is ads (none vs shown) and iOS requirement (12.0 vs 14.0). On 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
RobotVRM is free to download; Action & Sound costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Action & Sound ships an update every 6 months, RobotVRM every 4 days. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.
| Parameter | Action & Sound | RobotVRM |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | — | 1.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 6 months | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 45 MB | 8 MB |
| Age rating | 4+ | 12+ |
| Developer | Masanori Katsuta | RobotVRM |
In-app purchases
Action & Sound
No in-app purchases
RobotVRM
No in-app purchases
Questions
Is Action & Sound free?
Is RobotVRM free?
Do Action & Sound or RobotVRM have ads?
Which is updated more often, Action & Sound or RobotVRM?
Other comparisons
