Device Motion Detective vs Volume Lock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Device Motion Detective
This utility app captures and stores detailed device motion data, including accelerometer, gyroscope, and magnetometer readings. Users can view real-time motion graphs or past records saved to the database. Data is recorded every second for up to 20 minutes per session.
- Raw accelerometer data recording
- Raw gyroscope data recording
- Raw magnetometer data recording
- Processed device-motion data
- Real-time motion graphs
- Past motion record viewing
- Data saved to database
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Detect the device motion detail information and save the information into the core data system. The user could view the past motion record from the data base system. The user could view the real time device motion list or the motion graph. The app can receive four types of motion: raw accelerometer data, raw gyroscope data, raw magnetometer data, and processed device-motion data (which includes accelerometer, rotation-rate, and attitude measurements). The current version could record the device motion data for 20 minutes when tap the record button once. After 20 minutes, the user could tap the record button again. During recording, the app will insert the motion data to the database every second. Only after recording the motion data, the feature of view record motion data will display the record information. In current edition, when the device shutdown, the database information will be cleared automatically. In short, the app may be useful to some engineering users or other users who need the detail device motion data. Best wishes.
Volume Lock
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Take total control of your device's sound. Volume Limiter: Parental Lock ensures a safe listening experience by letting you set precise maximum limits, perfect for protecting young ears. Whether you're a parent wanting to prevent your child from blasting videos at full volume, or you’re looking for precise audio control to protect your own hearing, this app is your ultimate sidekick. No more sudden volume spikes or accidental level changes—just consistent, safe, and curated sound. KEY FEATURES: • Parental Volume Lock: Set a maximum ceiling and lock it down. Your child stays safe, and your ears stay protected. • Parental PIN Protection: Prevent kids (or anyone else) from bypassing your limits. Lock the entire app behind a secure, custom PIN code. • Safe Hearing Protection: Designed to help prevent noise-induced hearing loss by maintaining health-conscious decibel levels. • Smart Timer: Set a countdown to automatically stop the volume lock service, ideal for managed screen time or bedtime. • Sleek Circular Controller: A modern, high-fidelity interface for precise percentage control. • Background Mode: Works silently in the background while your kids play their favorite games or watch videos. WHY PARENTS LOVE VOLUME LIMITER: The essential tool for hearing safety and parental peace of mind. Recommended for anyone seeking to prevent sudden volume spikes or protect long-term hearing health. Simple, effective, and reliable—the gold standard for volume management. Protect their hearing. Empower your parenting. Take control today. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy : https://sites.google.com/view/vllprivacypolicy/home
Screenshots
Verdict
The clearest difference is in-app purchases: Device Motion Detective at none against Volume Lock's 3. Volume Lock's advantage is update cadence (every 4 weeks vs every 13 months). On price, ads, 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. Volume Lock sells 3 in-app purchases, starting at $0.99 per 7 days. Device Motion Detective asks for nothing beyond the download.
Device Motion Detective ships an update every 13 months, Volume Lock every 4 weeks. The most recent releases landed on October 7, 2026 and October 25, 2026 respectively.
| Parameter | Device Motion Detective | Volume Lock |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 13 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 2 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | 方 沈 | Rizwan Rashid |
In-app purchases
Device Motion Detective
No in-app purchases
Volume Lock
- Weekly Premium$0.997 Days
- Monthly Premium$2.991 Month
- Volume Lock & Limiter Pro$14.99
Questions
Is Device Motion Detective free?
Is Volume Lock free?
Do Device Motion Detective or Volume Lock have ads?
Which is updated more often, Device Motion Detective or Volume Lock?
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