Comparison

OpticALLY 3D Scan vs EMF Detector

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

OpticALLY 3D Scan

Capture precise 3D scans of your face with sub-millimeter accuracy using your iPhone's TrueDepth camera. Obtain detailed measurements for custom eyewear or digital avatars, with all processing done securely on your device.

Highlights
  • Sub-millimeter 3D facial scanning
  • Twelve clinical measurements
  • Export 3D models (.OBJ, .PLY, .USDZ)
  • On-device processing for privacy
  • More accurate than LiDAR
  • Custom avatar and eyewear design
Features
Read full description

Designed for the discerning. Powered by your iPhone's TrueDepth camera. Crafted entirely on-device. OpticALLY captures a sub-millimeter 3D scan of your face and computes the exact measurements an optician would take by hand — pupillary distance, bridge, temple, frame and lens width, and more — in seconds. No fitting room, no caliper, no guesswork. — FEATURES — ▸ Export your face in 3D Every scan can be exported as an .OBJ, .PLY, or .USDZ file. Drop it straight into Blender, Fusion 360, ZBrush, or Unity. 3D-print a digital twin, build a custom avatar, or design eyewear that fits only you. ▸ More accurate than LiDAR The front-facing TrueDepth camera projects thousands more depth points onto your face than the rear LiDAR scanner — delivering approximately 0.5 mm of measurement precision. The same hardware Apple trusts for Face ID, repurposed for optical-grade fitting. ▸ Twelve clinical measurements, in real time Binocular and monocular PD, bridge width, nose width, nose length, temple length, frame width, lens width, face width, face height, cheekbone width, jawline width. Every dimension your optician asks for, captured and displayed instantly. ▸ Privacy as a feature, not a footnote Every scan is processed locally on your iPhone. No cloud. No server. No data collected, transmitted, or stored. Your face is yours alone — measurements live in the app, and scan files are discarded when you close it, unless you choose to export them yourself. ▸ OpticALLY Pro Unlock the full measurement set, export, and on-device 3D mesh reconstruction with an OpticALLY Pro subscription. Restore prior purchases anytime from Settings. — REQUIREMENTS — OpticALLY requires an iPhone with a TrueDepth front camera (Face ID). iPads are not supported at this time. — PRIVACY — Privacy policy: https://wonmor.github.io/OpticALLY-iOS/ — TERMS — Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

EMF Detector

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Four new tools join the meter in 1.1: Radar, Metal Finder, Presence Meter and SLS-Style Camera. Every number on screen comes from your iPhone's own sensors. The magnetometer reading is real. What it means is up to you. THE METER: EMF Detector reads your iPhone's magnetometer and shows the live magnetic field in µT or mG. Each start calibrates a baseline for the room and tells you how steady it was. Readings are classed Calm, Weak, Potential, High or Extreme. - Meter | Graph switch; live 30-second graph with X, Y and Z toggles - Sensitivity presets, haptic and beep feedback - Record Mode: a clean full-screen view for filming - Siri and Spotlight shortcut into the meter THE TOOLS TAB (all four free to open): - Radar: a live compass radar driven by the magnetometer. When the field reaches Potential or above, a blip appears in the direction your iPhone faces. - Metal Finder: shows how far the field moves from its baseline, with a threshold, beep and vibration. It responds to magnets and magnetic metals such as iron and steel, not to gold or aluminium. - Presence Meter: shows how much your iPhone itself moves, from its accelerometer. Set it down and it reacts to bumps and vibration. - SLS-Style Camera: a live rear-camera view. Apple's Vision framework looks for human body shapes on your iPhone and draws a stick figure only where it finds one. People, mannequins, photos and TVs can show figures; an empty room shows none. Your live EMF reading stays on screen. RECORDING: Tap Record and walk the space; each spike is marked as it happens. Tap Stop for the timeline, spikes, baseline and peaks. Compare any two sessions side by side. FREE AND PRO: Free: the meter, graph, Record Mode, recording (3 most recent sessions kept), session detail, compare and all four tools. Pro adds: no ads; unlimited history; CSV export; radar skins (colour themes: Thermal, Night Vision, Vintage); Presence Meter recording, sensitivity and sound alert; SLS-Style Camera extras: Depth (LiDAR) on iPhones with LiDAR, a night-vision-style filter and photo capture. Without Pro, a rewarded ad unlocks one session's export while its screen stays open, or a time-limited trial of the Pro tool extras. The trial does not remove ads or unlock history or export. SUBSCRIPTIONS: EMF Detector Pro: Weekly $2.99 (3-day free trial), Monthly $4.99 (3-day free trial), or Lifetime $24.99, a one-time purchase. Prices are in US dollars; the App Store shows your local price. Free trials are for eligible new subscribers. Payment is charged to your Apple Account. Subscriptions renew automatically until cancelled. To cancel: Settings > your name > Subscriptions > EMF Detector Pro > Cancel Subscription. To avoid renewal after a free trial, cancel at least 24 hours before it ends. ADS: Free users see Google AdMob ads: a native card labelled "Ad" on the meter and tool screens, and occasional full-screen ads after you stop a recording, when you leave a tool, and when you go back from a saved session, a comparison or the instructions. No ads appear on their own in Record Mode or while recording. ENTERTAINMENT NOTICE: The magnetometer reading is real. What it means is up to you. Magnetic fields change near wiring, appliances, magnets, metal and other phones, and this app cannot tell those apart from anything else. It is made for paranormal-style entertainment and does not claim that a change in the field means a ghost is present. PRIVACY: No account. The camera works only in the SLS-Style Camera tool; images are processed on your iPhone and nothing is stored or sent unless you share or save a photo. Sharing usage data (Google Analytics for Firebase) is your choice, changeable in Settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ashaquavision.com/privacy-policy/emf-detector-ios/ iPhone only. Requires a device with a magnetometer.

Screenshots

OpticALLY 3D Scan2 screens
EMF Detector4 screens

Verdict

The call

The clearest difference is ads: OpticALLY 3D Scan at none against EMF Detector's shown. EMF Detector's advantage is update cadence (every 3 weeks vs every 4 months). On price, in-app purchases, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. OpticALLY 3D Scan sells 2 in-app purchases, starting at $4.99 per month and EMF Detector sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

OpticALLY 3D Scan ships an update every 4 months, EMF Detector every 3 weeks. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 8 level
OpticALLY 3D Scan versus EMF Detector: the parameters behind the verdict, then further details
ParameterOpticALLY 3D ScanEMF Detector
PriceFreeFree
Rating3.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size292 MB25 MB
Age rating4+9+
DeveloperWonmo SeongAshir Mehmood

In-app purchases

2 purchases

OpticALLY 3D Scan

Subscriptions2
  • Pro Monthly$4.991 Month
  • Pro Yearly$39.991 Year
1 purchases

EMF Detector

One-time1
  • EMF Detector Pro$4.99

Questions

Is OpticALLY 3D Scan free?
OpticALLY 3D Scan is free to download, with in-app purchases available.
Is EMF Detector free?
EMF Detector is free to download, with in-app purchases available.
Do OpticALLY 3D Scan or EMF Detector have ads?
EMF Detector shows ads; OpticALLY 3D Scan does not.
Which is updated more often, OpticALLY 3D Scan or EMF Detector?
OpticALLY 3D Scan ships an update every 4 months, and EMF Detector every 3 weeks. Most recently, OpticALLY 3D Scan was updated on October 5, 2026 and EMF Detector on October 7, 2026.

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