# Alarmist LiDAR Motion Detector — Night Vision Alarm & Camera

> LiDAR-powered motion detector and security camera for compatible Apple devices. (iPhone/iPad app by Folding Sky Co.)

- Source: https://appshunter.io/ios/app/alarmist-lidar-motion-detector/id6756851395 (this page in markdown: same URL + `.md`)
- Developer: [Folding Sky Co](https://appshunter.io/developer/1842155029)
- Category: Utilities, Travel
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 17+
- Requires: iOS 18.0 · 14 MB
- Languages: American English, Japanese
- Released: 2025-12-22
- Data updated: 2026-09-07
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/alarmist-lidar-motion-detector/id6756851395/reviews.md

## What is Alarmist LiDAR Motion Detector?

_Requires LiDAR sensor: iPhone 12 Pro or newer, iPad Pro (2020 or newer). Must be a Pro version._

Turn your iPhone into a motion-activated security camera. Alarmist uses your device's LiDAR sensor to detect movement, capture a photo, and log every event in a detection history that syncs across your devices through iCloud.

- Detect motion and capture evidence automatically
- Review detection history with photos on any device via iCloud
- Run silent: disable the alarm and flashlight for quiet monitoring
- Works in complete darkness using infrared depth sensing

How it works:

1. Place your device on a stable surface, aimed at the area you want to monitor
2. Configure the detection zone and sensitivity (or use defaults)
3. Arm the app
4. Keep the app in the foreground with the screen on

When motion is detected, Alarmist triggers a loud alarm (overrides Silent Mode), turns on the flashlight, and captures a photo. Or switch to silent detection: no alarm, no flash, just a photo and a log entry. Silent detection works best in lighted or dim conditions where the camera can capture a usable image.

LiDAR fires invisible infrared beams and measures depth, not pixels. A person walking through a doorway creates a large, sustained depth change that is unmistakable. This means Alarmist works in complete darkness with no visible light and no camera image required.

Every detection event is logged with a timestamp and photo. Browse your history on the device or enable iCloud sync to see it everywhere. Configurable auto-retention (30, 60, or 90 days) keeps storage in check.

Alarmist is a convenience tool, not a security system. It cannot guarantee detection of all events and should never be your sole means of protection. The device must stay plugged in for extended use, the app must remain in the foreground with the screen on, and locking the screen or switching apps stops monitoring. Technology can fail. Test in your environment and understand its limitations before relying on it. You assume all risk.

I'm a solo developer in Portland, Oregon. I built this app because I wanted it -- something I could set on a nightstand and trust to watch the door while I slept. I named it Alarmist because, well, when you're asleep in an unfamiliar room, overreacting to danger is the whole point.

## Key features

- Motion detection with LiDAR
- Photo capture on motion
- Detection history log
- iCloud sync across devices
- Silent monitoring mode
- Infrared depth sensing for darkness

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Alarmist Pro | $19.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/alarmist-lidar-motion-detector/id6756851395/reviews.md

### 5/5 — This is Magic

*2026-01-09*

Wow this thing really works. If you leave it charging overnight you can point it at the door and it gives me peace of mind esp at Airbnbs

**Developer response:** Thank you so much for your kind words!

## Frequently asked questions about Alarmist LiDAR Motion Detector

### What devices is Alarmist compatible with?

Alarmist requires a LiDAR sensor, making it compatible with iPhone 12 Pro or newer, and iPad Pro (2020 or newer). The app must be a Pro version.

### Does Alarmist work in complete darkness?

Yes, Alarmist uses infrared depth sensing via LiDAR to detect movement in complete darkness without needing visible light or a camera image.

### How does Alarmist handle storage?

Detection events are logged with timestamps and photos. You can configure auto-retention for 30, 60, or 90 days to manage storage space.

### Can I monitor my home remotely with Alarmist?

Yes, Alarmist supports iCloud sync, allowing you to review your detection history with photos on any of your compatible devices.

### Does Alarmist have ads?

Yes, Alarmist contains advertisements. The app is free to download and use, with optional in-app purchases.

### How often is Alarmist updated?

The latest version, 1.7.0, was released on March 30, 2026. Updates are provided by the solo developer to improve functionality and reliability.

### What are the limitations of Alarmist?

Alarmist is a convenience tool, not a guaranteed security system. The device must remain plugged in, the app in the foreground with the screen on, and it cannot guarantee detection of all events.

### Is Alarmist suitable for children?

Alarmist has an age rating of 17+, indicating it is intended for mature users due to its security monitoring nature and potential for complex settings.

## Version history (last 5 releases)

### 1.8.0 — 2026-07-29

perf(detection): optimize motion analysis and frame processing
perf(detection): optimize sparse motion-mask erosion

### 1.7.0 — 2026-03-30

feat(alarm-history): SwiftData log with CloudKit sync and Phase 2 polish
feat(settings): add new detection mode and rename trigger section
fix(detection): sync derived thresholds when config changes in idle state
fix(tests): update stale expectations and remove brittle detector tests
fix(ui): unify pre-arm and armed visual trigger thresholds
perf(detection): eliminate per-frame heap allocations in hot paths
refactor: remove dead code across detection, settings, and session
refactor(ui): rename "Alarm History" to "Detection History" in all user-facing text

### 1.6.0 — 2026-03-14

feat(i18n): add String Catalog localization with English and Japanese

### 1.5.0 — 2026-02-11

fix(detection): harden long-run trigger gating and clarify baseline adaptation
fix(detection): tighten daylight spikes and normalize capsule spacing
fix(detection): tune day/dim/dark response and unify monitoring status UI
fix(detection): unblock dark-scene calibration and beep on readiness

### 1.4.0 — 2026-02-10

feat(analytics): add Firebase Analytics and ATT for conversion tracking
feat(analytics): integrate TikTok App Events SDK for conversion tracking
feat(ui): add prominent monitoring banner and reorganize overlay layout
feat(ui): enforce dark mode globally across all screens
fix(a11y): respect Reduce Motion for alarm flashing animations
fix(ui): dark-tinted glass for all UI bubbles and consolidate disclaimer
fix(ui): fix toast dismiss button and persist dismissal across sessions
fix(ui): use non-adaptive colors on dark glass to prevent light-mode shifts
chore: add build/ to .gitignore
chore: bump.
docs(analytics): add conversion tracking SDK integration plan
style(ui): remove dark pill backgrounds from crosshair and distance label

## More apps by Folding Sky Co

- [Cumbersome: AI LLM API Client](https://appshunter.io/ios/app/cumbersome-ai-llm-api-client/id6753016821)
- [Dense: AI News Digest Widget](https://appshunter.io/ios/app/dense-ai-news-digest-widget/id6755408172)
- [Busybody Web Screenshot Widget](https://appshunter.io/ios/app/busybody-web-screenshot-widget/id6757285099)
- [Endemic: Local On-Device AI](https://appshunter.io/ios/app/endemic-local-on-device-ai/id6760927382)

All apps by Folding Sky Co: https://appshunter.io/developer/1842155029

## Related topics

[motion camera detectors](https://appshunter.io/ios/topics/motion-camera-detectors) · [motion camera sensor](https://appshunter.io/ios/topics/motion-camera-sensor) · [motion sensor](https://appshunter.io/ios/topics/motion-sensor)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-07.*