Sonic Motion vs Placed
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Sonic Motion
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Sonic Motion is an app that converts the values from the accelerometer, gravity, and rotation sensors into sound in real time. It plays sounds with a soft or hard tone depending on whether the sensor values are positive or negative. Select the motion of the X, Y, or Z axis and experience movement as sound!
Placed
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Find It Later, Remember Here, Where You Left It, Find Your Things, Save It. Find It, Never Lose Track! And so much more. Create a space, point the camera, and tap to save the exact location of tools, bins, gear, personal items, handoff spots, and reference points. Later, search semantically to recover what you marked, see what was nearby, and know when something was last placed there. Why people get it fast: - Mark real-world positions with AR - Choose visual marker styles for different situations - Save context like holder, purpose, and nearby items - Ask natural-language questions to find things later - Recover saved locations across your spaces Spatial Computer AI is built for the new habit of spatial memory: when you put something down, mark it once so you can get back to it fast. Free learning mode lets people try the behavior before they buy. Unlimited unlock removes the limits on spaces, saved marks, and semantic AI locate questions.
Screenshots
Verdict
The clearest difference is in-app purchases: Sonic Motion at none against Placed's 1. Sonic Motion also leads on iOS requirement (15.0 vs 26.0). Placed's advantage is update cadence (every 4 days vs every 15 months). On price, ads and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Placed sells 1 one-off in-app purchase. Sonic Motion asks for nothing beyond the download.
Sonic Motion ships an update every 15 months, Placed every 4 days. The most recent releases landed on October 9, 2026 and October 25, 2026 respectively.
| Parameter | Sonic Motion | Placed |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 15 months | Every 4 days โ better |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 โ better | 26.0 |
| Further details โ not scored | ||
| Size | 1 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Yoshiyuki Koyanagi | SpacePlant Corporation |
In-app purchases
Sonic Motion
No in-app purchases
Placed
- Spatial Computer AI Unlimited$19.99









