Magnetometer... vs ZapLock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Magnetometer...
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Turn your phone into a real-time magnetometer and magnetic field measurement tool. Magnetometer uses your device’s built-in magnetic sensor to measure magnetic field strength in µT. View X, Y and Z axis readings, track changes, record measurements, review history, and export your data as CSV. REAL-TIME MAGNETOMETER • Real-time magnetic field strength in µT • Individual X, Y and Z axis readings • Total magnetic field strength • Absolute and relative measurement modes • Custom baseline for measuring relative changes • Calibration guidance to help improve sensor accuracy MAGNETIC FIELD ALERTS Set a custom threshold and receive optional sound and vibration alerts when magnetic field strength exceeds your selected level. RECORDING & HISTORY Record magnetic field measurements over time and review saved sessions later. • Live recording and timeline • Current, minimum, maximum and average readings • X, Y and Z measurement data • Recording timestamps and duration • Detailed graphs and statistics • Measurement mode and sample information • Rename or delete recordings • Refresh or clear measurement history CSV EXPORT Export recorded magnetic field data as CSV for spreadsheets, analysis, experiments or other projects. CUSTOMIZATION & EXTRAS • 4 visual styles: Dark Green, Light Green, Neon and Warm • Support for 77+ languages • Offline mode available with subscription • Ad-free experience available with subscription • Built-in feedback and suggestions USE MAGNETOMETER FOR Explore magnetic fields, compare field strength between objects or locations, detect magnetic changes, test your phone’s magnetic sensor, run experiments and demonstrations, or record measurements for later analysis. Magnetic field readings depend on your device’s built-in magnetometer and calibration. Nearby magnets, metal objects and electronics may affect measurements. This app is intended for general measurement, experimentation and educational use and is not a replacement for calibrated professional equipment. LICENSED APPLICATION END USER LICENSE AGREEMENT: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
ZapLock
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ZapLock turns any folder in Files into a locked one — and back — without moving it. Pick a folder: On My iPhone, iCloud Drive, Dropbox, Google Drive. ZapLock encrypts every file in place, keeps the folder's name and location, and leaves nothing readable behind. A folder locked on your Mac opens here; one locked here opens on your Mac. UNLOCK WITH YOUR ZAPQR SIGN-IN Opening a vault is a sign-in, not a password. Face ID and the passkey ZapQR already put on this iPhone, or a magic link if you prefer. Nothing to remember, nothing to send over chat, nothing to leak. FILES OPEN INSIDE ZAPLOCK Tap a file and ZapLock decrypts that one file, shows it, and wipes the copy the moment you lock, switch apps, or the auto-lock timer fires. Leaving the app always locks — the app switcher never sees an open vault. SHARE, AND TAKE IT BACK Share a vault with anyone who has a ZapQR account. Each person unlocks it on their own device, with their own key. Remove them and their access ends immediately — even a vault they have open locks itself within a second. YOUR KEYS STAY YOURS Every file is encrypted with AES-256. The key is split: one half never leaves this device's Secure Enclave, the other is released by ZapQR only while your sign-in and your share are valid. Nobody — not DaSecure, not your cloud provider — holds a whole key. File contents and file names never leave your device. PORTABLE BY DESIGN The vault format is open and documented, and the same on iPhone, iPad and Mac. A folder on a portable disk or inside a synced cloud folder carries its protection with it. ZapLock requires a free ZapQR account (auth.zapqr.ai). One universal app for iPhone, iPad and Mac. ZapLock Personal is an auto-renewing subscription: $4.99 a month or $49.99 a year (local prices vary). Payment is charged to your Apple Account; it renews unless cancelled at least 24 hours before the period ends, and you can manage or cancel it in your App Store account settings. Folders you already locked keep opening on every plan. Terms of Use: https://zaplock.io/terms Privacy Policy: https://zapqr.ai/privacy
Screenshots
Verdict
The clearest difference is ads: ZapLock at none against Magnetometer...'s shown. Magnetometer...'s advantage is iOS requirement (15.0 vs 17.0). 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. Magnetometer... sells 2 in-app purchases, starting at $1.99 per month and ZapLock sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | Magnetometer... | ZapLock |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 5 days |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 97 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Olga Ivanova | DaSecure Solutions LLC |
In-app purchases
Magnetometer...
- magnetometer_by_oliva_subscription$1.991 Month
- magnetometer_by_oliva_donation$1.99
ZapLock
- Personal (monthly)$4.991 Month
- Personal (founder)$29.991 Year
- Personal (yearly)$49.991 Year
Questions
Is Magnetometer... free?
Is ZapLock free?
Do Magnetometer... or ZapLock have ads?
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